Repair: New-Nikkor 85mm f/1.8

Hello, everybody. I would like to apologies for not posting much these days and I also can not answer your questions as fast as I used to because I am suffering from hay fever. It is difficult and it affects everything I do. In fact, I was supposed to cover CP+ for you but it’s too much trouble for me to go there in this state. The medication helps but I get dizzy if I take it and I feel like I am looking-through a large aperture lens. Everything is “bokeh” in my vision and it’s not fun. Speaking of bokeh, I will show you a nice lens for that in this post and it is the type of bokeh that will make you happy. Stay with me and listen.

Introduction:

Today, we will talk about a lens that was considered to be one of Nikon’s “bokeh kings” in the past. They can be had for cheap because many of them doesn’t come with the Ai-ring upgrade and many people poo-poo manual focus lenses in favor of the new autofocus or VR equipped lenses. I will show you why this lens is worth hunting and how it can be of great use to you creatively when you know how to use this lens. Read and enjoy!

IMG_5895The New-Nikkor 85mm f/1.8 is considered to be a classic. It is a good upgrade to the lens it replaced (Nikkor-H 85mm f/1.8 Auto). It has a new barrel to be consistent with the New-Nikkor theme. Nikon made a masterpiece when they designed this lens and it was a difficult act to top. In fact, it kept its place in many photographer’s bag even if it was replaced by the Nikkor 85mm f/2 Ai and Nikkor 85mm f/2 Ai-S that came after it. Many consider that the drop in lens speed is a downgrade and despite the fact that the newer lens is smaller, many people still love this lens a lot because of how well it performs.

The Nikkor-H 85mm f/1.8 Auto is an amazing lens it filled the missing focal length for the F-mount. Nikon has the Nikkor-P.C 8.5cm f/2 for the S-mount but there was no 85mm lens for the F-mount until the Nikkor-H 85mm f/1.8 Auto debuted and it quickly became a big hit. The lens in this article is not only a cosmetic upgrade but was also re-calcutated so it can now focus closer and give better results at closer distances. It’s big and heavy but it is well-balanced even when mounted on smaller cameras like the Nikon FM.

The optical formula of this lens is simple, it only has 6 elements in 4 groups and that is a big thing because you have less air-to-glass surfaces. Lenses with less elements will give you a more natural look in general because light gets “processed” and “filtered” on each element it passes through. Less elements also means that it is less vulnerable to flare and ghosting because there are less surfaces for light to reflect from.

Some people claim that this lens is superior to the lenses that succeeded it and I can tell it is not without basis that such a claim came to be. I shoot with both lenses and I can say it has a different look to its rendering and the performance can be better in some regards. I will do a side-by-side comparison one of these days when I am in the mood but you know me as somebody who is not interested in these sort of things and I will only do this just to illustrate my point. Regardless of which lens you get, you are assured that you will have a great portrait lens that’s also amazing for general photography.

The following sets of images were shot at f/1.8, f/2.8 and f/4 respectively. This should give you an idea of how this lens performs and which aperture to use to get the look that you want. I will use the word “look” a lot in this introduction because I use this lens just for the unique rendering it gives to my pictures. I choose lenses like I choose my airbrushes or paint brush and it all depends on what kind of look I am after. The good thing about it is that this lens changes character as you stop it down and this will help you a lot when it comes to making artistic decisions. Some people just want to shoot a lens wide-open and while that is OK, you will want to examine and learn to use your lenses by seeing how it performs on every useful aperture. This will help you determine if a lens is rubbish or if it’s worth keeping. Gladly for this lens, I can confidently say that this is a keeper! Look at my samples and judge this lens for yourself. I would like to use some portraits that I took with this lens but I don’t want to show people pictures of family and friends for the sake of privacy but you can trust me when I say that this lens is stunning for portraiture.

(Click to enlarge)

I shot the boring pictures above on purpose to show you how this lens performs when it comes to chromatic aberration and similar artifacts. Lenses with large openings tend to fare poorly here but that also means that these lenses have better “3D pop” because the uncorrected “flaws” add to the unique look of this lens. Wide-open, you can see a bit of magenta and green tinting on the highlights which quickly goes away by f/2.8 and you’ll also notice a little but of blooming on the highlights which you can use to your creative advantage. It’s also clear that the lens is sharp wide-open.

(Click to enlarge)

People buy this lens for the bokeh and it doesn’t disappoint in this department. The balls look pleasing wide-open but the 6-sided iris quickly shows its ugly face at f2.8 and by f/4 the balls look polygonal. Some people like this polygonal look and to be honest, I prefer this look sometimes. It all depends on your creative taste and direction.

(Click to enlarge)

This set reminds me of the opening scene of the Welcome to the Jungle MTV. You get a bit of elongated bokeh balls with this lens because of the huge front element. The good thing is the balls look evenly-illuminated and you don’t get any harsh edges or concentric rings on the bokeh balls. It all looks very natural and delicate to say the least.

(Click to enlarge)

This lens shines when it comes to shooting subjects at closer ranges. The center is sharp wide-open but the very thin DOF makes it difficult to focus. The subject seemingly pop in front of you and the vignetting also helps give you this illusion. It gets better as you stop it down a bit and the background still looks nice and creamy. The vignetting is now gone and the frame looks evenly-illuminated. I shot this against the sky just to show you how the vignetting looks on this lens.

(Click to enlarge)

Here are more sample shots. I shot some foliage in the background on purpose so we can see if this lens is capable of making terrible bokeh. Foliage is notoriously difficult to shoot when not in-focus and it will show if a lens has terrible bokeh or not by exhibiting what I call the “double bokeh” effect. Just like our previous samples, the lens performed great in this set and is very consistent. I had to over-expose my shots at f/1.8 to help mitigate the vignetting. Lenses with large apertures tend to behave like this so it can’t be helped.

(Click to enlarge)

These were shot with Fujifilm Industrial 400 and this should show you how bad the flare is when you shoot this with film. These were probably shot at f/5.6 and you can see that it flares terribly when not using a hood. You can use this for your creative license though.

(Click to enlarge)

As previously mentioned, this lens is great when shot near its minimum focus distance. It is sharp and focusing close amplifies the lens’ ability to produce a very soft background. I like it for its painterly-effect and very natural-looking rendering. The pictures that come out of this lens look neutral and it doesn’t have a color cast as far as I can see.

(Click to enlarge)

This lens is great for use in low-light applications. These were shot at ISO1600-3200 and it is great how this lens performs in this environment. Shooting this lens wide-open is what this lens is all about, just click on the image and zoom-in at the teeth of the mask to see if I was joking or not.

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Some more samples using Fujifilm Industrial 400. I beg you to click on the pictures to see the larger versions. These were shot from f/2.8 to f/4 or so and you can see just how good the lens is. The rendering looks so natural and “organic” compared to the modern lenses that top the charts with their sharpness and other metrics. You cannot judge a lens using numbers and charts alone, the “intangibles” is what makes a lens special or not. I can say that the pictures have a delicate feel to them, the bokeh is also exquisite and smooth. The patterns of the straw hats renders beautifully, a lens with terrible bokeh will render them terribly and the lines will look “busy” and rough.

FH000032Here’s another picture with straw hats in the background. Patterns with high frequency will render terribly if a lens has poor bokeh. The blurred chin straps will also look bad, it looks nice here and it doesn’t exhibit the ugly “double-line” bokeh. This is a term used for describing long objects that have been blurred but the blurred line looks like it has split into 2 separate lines and hence “double-line”. Take a look at the details of the lady’s straw hat and here eyelashes. Her skin also looks nice with a subtle glow at the highlights, this is due to spherical aberration that was deliberately calculated into the lens’design. If this was not intentional then it should have been gone by now since I took this at f/4 I think. I love this shot a lot. Some people will pay plenty of money for a German lens just for that!

FH000029This picture is exquisite! I think I took this at f/4 or so, the details look so crisp and I love how the lady simply “pops” because of the 3D effect. If only I can show you the negatives, you can really feel the depth of the pictures and seeing scanned pictures give it no justice to say the least. Also notice that the lens is well-corrected since chromatic aberration isn’t present in this picture in areas of high contrast.

FH000033Some people like polygonal highlights and some people don’t. This has a 6-bladed iris and the bokeh balls will look hexagonal even if you stop the lens down a bit. I would prefer it to be 7-sided since an odd-numbered iris looks more organic to me. The focus was off by a bit here but you can still see how beautiful this lens renders skin. This lens will be very good for shooting portraits because it’s sharp but not too sharp as to render every detail in your subject’s skin. This makes for more flattering portraits and can make your model look younger. I love how this lens separates the subject from the background.

(Click to enlarge)

Contrast looks nice but not overwhelming as some Zeiss lenses from the post-war years tend to be. It still looks natural while retaining a nice contrast. The color is saturated but it doesn’t look “cartoonish” as some lenses will tend to make scenes like these look. When I say “cartoonish”, I am just describing how un-natural the colors look. The choice of film also has a big role here but the lens is half of the equation. This gives a “vintage-look” to your pictures and you can use this to set yourself apart from the competition.

(Click to enlarge)

The pictures above should give you a good idea on how this lens performs in real-world use. The pictures all look very natural and pleasing. The rendering is “soulful” and look very unique in such a way that the images look “dense” and thick with environmental effects. Environmental effects is a jargon we use at work to imply that an image has the “look” and it doesn’t look flat like a computer-generated image. This is why we are using older lenses because newer lenses are usually so well-corrected that we lose these small things that make an image look unique and natural.

(Click to enlarge)

The samples above were shot with Fujifilm Industrial 400. Having seen my test shots, can you tell which photo was shot using which aperture? I love how this lens performs and it shows here in these samples. This lens was calculated during the film era so it makes lots of sense to take sample photos using film. Even with a bottom-shelf film, the lens renders beautifully. The details are sharp and the tones are rich. These were scanned at the shop using a cheap scanner and even with that the quality looks nice, I love it!

This is probably the most holistic review of this lens on the net. Not only did you observe how this lens performs with digital but you also saw how this lens works with film! Not a lot of folks online talking about this lens and whatever information is available is spread around the net. I hope that I can generate some interest with this article.

That’s it for the introduction. I took plenty of photos this time because I want you to see what this lens can do. Again, you shoot this lens for the unique look of the images it gives and not for other things like pin-sharp centers wide-open. Although this lens can also be sharp wide-open, it is no-match for modern lenses that almost peak at the center when it is shot wide-open but ask yourself this question: do the modern lenses have this unique look? Maybe not a lot of modern lenses can do that. Let’s now begin with the teardown!

 

Before We Begin:

If this is the first attempt at opening a lens then I suggest that you read my previous posts regarding screws & driversgrease and other things. Also read regarding the tools that you will need in order to fix your Nikkors.

I highly suggest that you read these primers before you begin (for beginners):

Reading these primers should lessen the chance of ruining your lens if you are a beginner. Also before opening up any lens, always look for other people who have done so in Youtube and the internet. Information is scarce, vague and scattered (that is why I started this) but you can still find some information if you search carefully.

I highly recommend that you also read my working with helicoids post because this is very important and getting it wrong can ruin your day. If I can force you to read this, I would. It is that important!

For more advanced topics, you can read my fungus removal post as a start. This post has a lot of useful information here and there and it will be beneficial for you to read this.

About Me:

I am a photographer based in Tokyo who scours the junk section of the camera shops here on a regular basis. I started this hobby of fixing old lenses and cameras because I kept on getting scammed before when I purchase online. This turned out to be a blessing because I now buy junk lenses for a fraction of the price and then fix them to add to my now-growing collection. This allowed me to buy gear that were otherwise off-limits to me if I were to get them in better condition.

I was a scale modeller before who built models for other collectors for a very longtime, got an education as a dental prosthodontist (but didn’t pursue dentistry) and growing up in a watch repair shop gave me the useful skills that would help me in this craft. Fixing my car also contributed some know-how.

Having mentioned the above, I will tell you now that I am not a professional repairman! So please take what I do with a grain of salt and I will never be held responsible for anything wrong that will happen to you and your project. I hope that the pros would guide and teach us but nobody is writing anything.

As my collection of repair notes grew, I get requests from people with similar interests and from professionals who just needed some notes just in case. Now, I am sharing my library with you for your entertainment and reference. I hope that you find my work useful.

Disassembly (Lens Barrel):

I got this lens from the junk section of Alps-Do Camera and despite having a stiff focusing ring, the optics looked clean with only traces of mild fungus and dirt. It was clear that it was used heavily by the previous owner and that is a good sign because I know that this lens was a keeper for him.

Just like most smaller Nikkor primes, you will want to extract the objective first and keep it in a safe place while you work on the lens barrel. The lens barrel is simple enough for somebody with moderate experience to work on but there are some things that you will have to pay attention to so please follow this carefully.

IMG_5897Look for the small set screw in the front ring and carefully remove it. It may be sealed or glued with lacquer so place a drop of alcohol first to dissolve it just in case, wait a while and then unscrew it using the correct-sized driver.

IMG_5898The front ring should come-off easily. If yours is stuck, just repeatedly saturate the screw hole from the previous step with alcohol and then use a pair of rubber gloves to help you grip it better. Like what I always say, Nikkors made in this era uses plenty of glue.

IMG_5899The front ring secures the objective so you can extract it as soon as it’s gone. Please don’t ever try and remove the screws near the rear end of the objective’s casing because this is how the iris mechanism is calibrated. You adjust your iris’ size by loosening these screws and then turn the iris mechanism until you get the proper iris opening size. This is set at the factory so make marks to remind you how they should go back should you decide to dismantle the iris for cleaning.

IMG_5901Now that the objective is gone, you can now safely work on the lens barrel without being afraid of damaging the delicate glass. To dismantle the lens barrel further, remove these screws from the bayonet mount. If you are new to this, be sure to read my fundamentals on working with screws. These are sometimes glued so be careful and always remember to use the correct JIS screw drivers for these. Japanese lenses DO NOT use Philips drivers!

IMG_5902The bayonet mount can now be safely removed. There is nothing connected to it so don’t be afraid to pull it away.

IMG_5903The aperture ring can now be removed. Be sure to clean it very well because germs and dried lubricants tend to hide under this thing.

IMG_5904The metal grip is secured with these screws. Carefully remove them using a driver that’s a perfect fit for them because using a bigger driver will scar the beautiful knurling and a smaller one will strip the head really quick.

IMG_5905The grip can now be safely removed. The sleeve can also be removed at this point but it’s sometimes glued with contact cement and if that’s the case just use solvents and saturate it at its seams.

IMG_5906The rubber grip can be removed easily but be careful not to tear it. The front bezel of the focusing ring is removable so you can safely remove the rubber ring but that front bezel is almost always glued and it is more trouble removing it that just outright removing the rubber grip while the bezel is still there.

IMG_5907At this point, be sure that your lens barrel is set to infinity and keep it that way while you work with the lens barrel. The focusing ring can be adjusted as you can see here. Take a lot of notes and pictured before you proceed.

IMG_5908The focusing ring is secured by these 3 screws. Carefully remove them after taking notes and pictures of the focusing ring’s position.

IMG_5909The focusing ring can now be safely removed.

IMG_5910Before I proceed I made a scratch to remind me how the helicoids should be aligned and positioned while the lens barrel is focused to infinity, this will be of great help later when it’s time to reassemble this thing. The helicoid key keeps the helicoids in-sync as you turn the main helicoid, it also secures the helicoids and it can be removed by extracting these 2 screws. Do take note of which side of the helicoid key is facing the front of the lens. It is also very important to take note of the inner helicoid’s position at this point.

IMG_5911The helicoid key can now be removed. It slips underneath one of the helicoids. That tiny screw at the middle of it is used to widen the helicoid key’s tongue. Never remove it!

IMG_5912Now that the helicoid key is gone, the helicoids can now turn beyond the range set by the helicoid key. Turn the main helicoid until the lens barrel collapses all the way and make a diagonal mark to remind you that this is how far the main helicoid can go. Later when you reassemble it, you should get the same thing or close to it by a factor of less than 1/3 of a mm. This will help you determine if you reassembled it properly or not.

IMG_5913Time to separate the helicoids. Begin by separating the main helicoid from the outer one. Mark where they separated because this is also the same spot where they should mesh. I highly recommend that you read my article on how to work with helicoids. Many people get stuck here because they failed to mark where their helicoids separated.

IMG_5914The inner helicoid’s movement is constrained by these 2 stops. Carefully remove these so you can proceed but do take notes on which stop should go where so you won’t jumble it later on during reassembly. These are sometimes not identical and is sometimes adjusted at the factory with a file.

IMG_5915You can now remove the inner helicoid. As always, mark where your helicoids separate!

IMG_5927Don’t remove this thing. It comes into contact with the stops and you adjust this so that your lens can focus to infinity. Just forget about this for now and worry about it later on.

IMG_5928This is the rear view, remember not to damage this thing.

IMG_5916To remove the coupling forks for the iris you must first remove the plate that secures the assembly by extracting these 3 screws.

IMG_5917Carefully remove this screw. This screw is delicate and it’s couples the aperture ring to its fork inside the lens barrel.

IMG_5918This retainer ring can be removed by a lens spanner. Do not remove it unless you know what you are doing because this ring secures all those tiny bearing balls. My lens needed a thorough cleaning to kill the germs so I had to do this, otherwise I would just skip this.

IMG_5919See what I mean? To prevent me losing any bearing balls, I place a pan underneath so it will catch anything that fell from the lens barrel.

IMG_5920Unscrew this abutment so you can prevent any damage to the spring.

IMG_5921Everything can  now be safely removed.

IMG_5922This plate can be removed by extracting these screws. If you didn’t remove the retainer for the bearings then you can remove the whole assembly by just unscrewing these.

IMG_5923The plate can now be removed. Take note of its position before you remove it.

I was expecting this to be of a conventional design but this is a little bit more complicated than I expected and is more in-line with the more expensive lenses of the era just like the New-Nikkor 55mm f/1.2 lens. This makes sense because this used to be a premium lens in its day. Thankfully, disassembly was pretty straight-forward and it was an easy lens for me to work on. It took me about an hour to completely dismantle the lens barrel and do a thorough cleaning of every important part (excluding the ball bearings).

Disassmbly (Objective):

The objective is of conventional design and it should be easy to work with. Just be careful with the big and heavy glass elements and be patient because just like the lens barrel, it’s also glued at the factory on most parts. Use the proper tools to clean and open this and it should be fine. I didn’t work on the iris mechanism because mine’s clean anyway. if you have an oily iris problem then you should look for other lenses in my Lens Repair list and look for one that has a similar-looking iris mechanism and then use that to help you get it done. I will admit that I was tempted to open it but I got lazy.

IMG_5930The rear element is secured by this collar and it can be removed with your bare-hands.

IMG_5931Carefully extract the rear element with a lens sucker and note which side is facing front. Notice that I marked mine with a Sharpie. I also made 6 lines to note that this is the sixth lens element. The marks were made at the leading edge of the element so I will easily see which side should be facing where. Never ever put a lens element back the wrong way!

IMG_5934The rear optical block can be removed just like this.

IMG_5932The front element is secured with a retention ring. Mine was glued so I had to use lots of alcohol to saturate it before I could remove it. I will get back to it later and let the alcohol do its thing and soften the glue for me.

IMG_5933The front optical block comes off like this. I used a rubber friction cup to unscrew it.

IMG_5935This collar can be unscrewed just like this. It is sometimes glued so be careful.

IMG_5936Remove this doublet and be careful not to touch this with alcohol or any solvent. That is going to dissolve the optical cement and it will cause a bigger problem that is not easy or cheap to fix. This can be very tight at times so don’t force it. It’s sometimes set so tight it is possible to create a vacuum. If this happened, just open the front elements to break the seal and release the air pressure. You can also push the element out from the front, too.

IMG_5937At this point, the glue on the front element’s retainer ring has softened and it was easy to remove it with a lens spanner.

IMG_5938Extract the front element with a lens sucker.

That’s it for the objective. Always remember to put it back in the correct direction and it should be fine. It doesn’t matter if you start from the rear or front. If yours is clean and it just has a little bit of dust then just leave it alone.

Conclusion:

It took me the whole night to work on this lens. It took me more time to finish this due to the fact that I had to put those annoying bearing balls back to their rails. Remember, if it is not dirty or you don’t have the skill for this thing just leave the bearing alone!

IMG_5924Putting back the ball bearings is very time-consuming. Begin with a few balls until you reach this point.

IMG_5925Carefully fill the race with balls until you can barely move the ring. If that happened, slip one ball at a time by wiggling the ring and letting the ball fall into position.

IMG_5926Once you are done, secure the assembly by putting the ring back. Don’t tighten it to the point where the balls cannot move freely. I also secured it by dabbing lacquer to the ring so it won’t undo itself accidentally.

IMG_5929Here it is now, nice and clean, no more fungi!

IMG_5927Reassemble your lens but leave out the focusing ring for now but don’t forget to reinstall the front ring so your objective won’t drop to the floor. Adjust your lens’ infinity focusing by adjusting this thing. Read my post on how too adjust your lens’ infinity focus if you are new to this. Once your lens is able to focus to infinity, make sure that the stop is secured by tightening its screws and make sure that the helicoids will stop turning as it reaches infinity. Remove the front ring and reinstall the focusing ring. Make sure that the symbol for infinity is dead-center with the focusing scale and tighten the focusing ring’s screws.

IMG_5939Here is the lens now, it is now squeaky-clean! All I need to do is to reinstall the rubber. It is very important that you calibrate your lens so that it can focus to infinity perfectly. It is very important because if you got it wrong then your lens will not focus properly down the whole range of the scale. Luckily, it’s easy to adjust this lens.

That’s all for today. I was considering skipping this weekend or just posting something a bit shorter but I just cannot let you down so I just did what I think is right. This blog is a big part of my life and I put a lot of effort in maintaining this. See you guys again in the next blog post. I will do a couple of Contax-related articles next so I hope that you stay for it. I consider the Contax (and Zeiss) to be Nikon’s ancestor when it comes to design and philosophy (sort of) so it’s very important that we look into this as well if you are really serious with studying Nikon’s history and how things came into being. Thanks for being there and I would like to tell you that we are hitting more than 30,000 views consistently! This is a big thing for a small blog with very limited readership. My goal is to hit 50,000 by the end of this year, can you help make that happen? Thanks again and I promise that I will do my best to keep this blog going despite being busy or sick. Ric.

Help Support this Blog:

Maintaining this blog requires money to operate. If you think that this site has helped you or you want to show your support by helping with the upkeep of this site, you can simple make a small donation to my paypal.com account (richardHaw888@gmail.com). Money is not my prime motivation for this blog and I believe that I have enough to run this but you can help me make this site (and the companion facebook page) grow.

Buy me a roll of film or a burger?

Thank you very much for your continued support!

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Helping support this site will ensure that this will be kept going as long as I have the time and energy for this. I would appreciate it if you just leave out your name or details like your country and other information so that the donations will totally be anonymous it is at all possible. This is a labor of love and I intend to keep it that way for as long as I can. Ric.

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8 Comments (+add yours?)

  1. Danny Hoffman
    Mar 04, 2018 @ 16:41:41

    I’m a 72 year old man and a very amateur photographer who loves reading your stuff. Have arthritis in my hands. Had to switch from my nikkormate cameras to the Canon auto focus, but love my EL- FT2-FT3 and my very favorite X-700 do not like digital love film, will donate have a nice bugger on me. Thanks Dan Hoffman

    Reply

  2. Trackback: Repair: Nikkor 85mm f/1.4 Ai-S | Richard Haw's Nikon Maintenance Site
  3. Trackback: Repair: Nikkor 85mm f/2 Ai | Richard Haw's Classic Nikon Repair and Review
  4. Trackback: Report: Nikkor Prototypes (Part 3) | Richard Haw's Classic Nikon Repair and Review
  5. Trackback: Report: Nikkor Prototypes (Part 5) | Richard Haw's Classic Nikon Repair and Review
  6. Bob
    Nov 09, 2018 @ 00:08:47

    Hey Ric, I’ve been reading your articles for a while and have greatly appreciated and enjoyed the content. I have repaired at least a dozen lenses because of your help. However I recently picked up a Nikkor H auto 85mm 1.8 non ai in good cosmetic and optical condition. I have successfully disassembled and cleaned it it but the aperture is in bad shape; only 4 of the 6 blades have the pins left, the other 2 must have snapped or fell off and therefore can not be used. I tried using 3 blades just to see, but it is an undesirable look for me. Do you know of any cheaper lenses that I could steal the aperture blades from? The lens is in good shape otherwise and I would like to save it if possible. I was going to use some from a Nikkor q 135mm 3.5, but the blades were too short (I’m guessing the focal length and max aperture play a great role). Hope your doing well and thanks again for the great content

    Reply

    • richardhaw
      Nov 09, 2018 @ 00:43:06

      Hello, Bob.
      The blades are usually unique to their lenses. If you still have the pins you can restore them with care. A very small amount of solder can help. With the right technique you can supply the solder in a very thin manner and coat the junction ONLY. This trick requires that you heat the pin for a couple of minutes so the tin will glide on its surface. do use some flux. Ric.

      Reply

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