NikonGear'23
Travelogues => Future NG Events - and Location Reveries => Topic started by: Bjørn Rørslett on January 06, 2016, 13:38:26
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During the Scotland Event in May, 2016, there will be provisions for on-the-site CPU modification ('chipping') of your manual lenses for Nikon mount. Most likely, Erik ('Dr.Lens') and I will work together to provide a modification service. Many lenses can be done in a very short time, whilst others take longer. Thus I need to have an overview of what lens(es), if any, the participants are interesting in having modified.
In accordance with the underlying idea of Nikongear, prices will be kept to the minimum. The modification itself will be £10 for NG Supporters, £20 for ordinary members. In addition, you pay a nominal price for the CPU and mounting hardware. The exact price of the latter depends on the overall interest, but again will be kept to the lowest possible level, perhaps down to £30 per lens (I'll refine the estimate later).
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I definitely wil have a few lenses for chipping.
16/2.8 AI-S (chip is broken)
28/2.0 N.C AI-converted
105/2.5 P.C AI-converted
When they are worth it:
20/3.5 UD AI-converted
24/2.8 N.C AI-converted
50/1.4 S.C AI-converted
55/3.5 P.C Micro AI-converted
135/2.8 Q.C AI-converted
200/4.0 Q.C AI-converted
Probably a few Nippon Kogaku lenses for cleaning.
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Hm. We're looking to busy days ...
Doubt there will be much time for cleaning of lenses, though, if the amount of chipping work piles up.
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[redacted] *Sourced answer to my question.
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Yoou can add my 400/5.6 ED AIS to the list . . . .
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The followings firmly need:
# micro nikkor 105mm f/4;
# Nikkor 105mm f/2.5 AI
# Nikkor28mm f/2 AI;
# Voigt 90mm f/3.5 apo lanthar SL;
# PN11 ring (not sure it's doable and I am aware that's would be a bigger job)
According to the final price:
# Zoom Nikkor 36~72mm;
# Nikkor 300mm f/4.5 ED (non IF)
# Micro nikkor 55mm f/2.8 AIS (but there is some play in the focusing ring which is still quite firm although it was recently serviced).
# Micro-Nikkor 55mm f/3.5 which I plan to do its AI conversion.
# Nikkor 55mm f/1.2 AI, but I know that will be a huge challenge, regarding the thinness of the flange (or the big rear glass !)...
That's it ! :)
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Really a huge interest I chipping here I see :o ::) ;D and Bjørn has set the price at bargain level.
Please be aware that some lenses are a whole lot more difficult and time consuming to chip than others... So... Given we only have few days let's see how much we manage to do ;)
PN11 is really easy to chip...
The 55mm 1.2 Ai is one of the only lenses that we have not yet chipped, the reason being that the rear element is larger than that of the 50mm 1.2 Ais. It's actually just as difficult to chip as a Noct Nikkor...
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We might have to change the price for these modifications as Erik tells me I have been overly optimistic :D
Besides, as the interest in this project seems huge, probably not all lenses can be done on the spot - Erik won't see anything of the countryside :D
I'll go through the suggested lenses and make a priority list from them. Some are easier than others and what Erik and I can do is setting up the CPU and drill the required holes, then let the NG participants take over to complete the mission. A kind of "drive-in" self-service as it were.
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Still got some chips in stock and need to learn how to do the chipping - and I appear not to be part of the gathering :D
Main remaining question still is (besides the exact tools used)
you drill (and countersink) two holes for the screws that hold the contact blocks
BUT is there a thread cutting procedure as well or is this worked like screws in wood?
(maybe it's the wrong place here - if so, sorry)
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The holes in the contact block backing plate has threads for the two screws.
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To add to what Erik states: the metal backing plate accepts screws for metal not the wood-screw type. In fact, the latter type will damage the rear guard. The factory screws have heads of a dedicated shape that can be sunk easily so as not to chafe on the camera's mount.
The lateral tolerance for positioning of the holes in the bayonet mount is quite tight, that is why we prefer using a drilling template (jig). The metal thickness of the mount rim should be 0.8-0.9 mm as the screws are designed to come flush to the rear surface of the metal plate. Remember there might be other lens parts inside so screws could easily snag on these if they were longer. Older bayonets are thinner and might be acceptable even without additional metalwork on them to make them the correct thickness. Newer mounts need trimming.
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probably not all lenses can be done on the spot -
the NG participants take over to complete the mission. A kind of "drive-in" self-service as it were.
That is absolutly fine for me. I understand in case of rushing lenses to process you have to restrain each attendant in order to make everybody happy.
And I am sure there will be many further occasions to get together again... :D
So, i will be more than happy to help if needed (drill, file) but I am completely ignorant about the programming stuff... ;)
I guess one of the log cabins will turn into assembling lens factory... ;D
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We could set up a "do it yourself" shop ... People can take their Dremel with them and we all pitch in for a crate of beer and/or whisky. That'll be entertaining and likely to create a raucous and lively mood after a while :D
I have extra jigs and mounting hardware. No problem. Programming can be done on the spot if I bring my remedies.
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I will do the dishes. :D
My eyes are not good enough for those tiny screws. :(
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Thank you Erik And Bjørn for the feedback and valuable insights. I think I have go further improve my imagination of all these parts (was a spontaneous question, its years ago since I have made my last considerations) and some disassembling/reassembling training.
BTW a chipping- do it yourself workshop would indeed be a fine idea
(Wolfgang, lets buy a Dremel at first) ;-)
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A familiar set up for Dr Lens :)
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A familiar set up for Dr Lens :)
Dr Lens seems so busy that he has to work overnight ! ;D
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Nice colors Jakov! :o My hairdresser just called,,, ::)
What on earth are we working on? so many moons ago,,, ;D
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The pink workshop :-*
I cannot remember what you were working on, and you have worked on so many lenses over the years that it's no wonder we cannot keep track any longer.
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Jakov, you shot him with an IR camera. So now the challenge is to find out on what trip you brought your IR camera :D
Perhaps there is some EXIF info that could be useful?
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The exact time and date is in the title of the photo.
We were in CPH the three of us, and as far as I can tell, during that gathering I had some cans falling all over me :)
Which lens was worked on would be a wild guess...
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True enough. A lot happened on that CPH visit to Erik. Might be an 85/2? Or PC-Nikkor? or what have you.
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Doesn't look like a Nikkor...
Anyway
(https://farm1.staticflickr.com/766/23254376960_4bdca4281d_o.jpg) (https://flic.kr/p/BqUL6N)_EGL6893 (https://flic.kr/p/BqUL6N) by Erik Gunst Lund (https://www.flickr.com/photos/erik_lund/), on Flickr
A lot of fun we had :o
(https://farm1.staticflickr.com/655/23550072515_683338eddc_k.jpg) (https://flic.kr/p/BT3h62)_EGL9791 (https://flic.kr/p/BT3h62) by Erik Gunst Lund (https://www.flickr.com/photos/erik_lund/), on Flickr
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Bjørn during the pink workshop :)
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Pink Tuborg beer can, that's truly something new ;) He He Fantastic Jakov!
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What no Haggis to go with the beer and whisky? I am shocked! :o :o :o
We could set up a "do it yourself" shop ... People can take their Dremel with them and we all pitch in for a crate of beer and/or whisky. That'll be entertaining and likely to create a raucous and lively mood after a while :D
I have extra jigs and mounting hardware. No problem. Programming can be done on the spot if I bring my remedies.
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This is how it was done in the old days:
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Brute force approach. Well done, Erik.
I guess this is the stray light baffle of your 300 mm f/4.5, Jakov?
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I think you might be right Bjørn!
A Bimetal blade will outlast any Dremel disc many times ;)
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The EXIF says 58mm @f/2.8.
Erik must have borrowed his Noct for this image because I do not own a 58mm lens???
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Here is another 58mm @ f/2.0
It could be that Erik was chipping my 105/4 micro?
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End result, shot with D700+58mm @ f/11.
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Apparently you are right, Jakov. 105 Micro it is.
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Indeed and shot with my Noct-Nikkor ;) 300mm 4.5 came a bit later,,,
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Not chipping as such, but I was hoping that Erik might help with a Mamiya Sekor 500/5.6 that I have and is not achieving infinity focus...
Would that be possible?
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Sorry I have not worked on anything like this lens, would not know where to begin.
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Sorry I have not worked on anything like this lens, would not know where to begin.
The lens is manual focus and quite simple in construction.
I have opened it easily to take out the sliding shade, which had a dent and had come stuck (during shipping I think). There was also a light baffle that had come lose inside and I put it back in place.
I suspect someone experienced like you might form an idea on how to restore infinity focus.
I'd be happy if you were willing to just have a look at it, with no promise to fix it.
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Naturally I can have a look ;)
It's just also a big thing to haul to Scotland camera and all,,,
You could poste some images of it maybe it can be done online,,, by the NikonGear community ;D
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Naturally I can have a look ;)
It's just also a big thing to haul to Scotland camera and all,,,
You could poste some images of it maybe it can be done online,,, by the NikonGear community ;D
Thanks, I'll be driving so that is not a problem for me.
But yes, I can definitely show pictures, I will open a thread later when I am back home.
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Naturally I can have a look ;)
It's just also a big thing to haul to Scotland camera and all,,,
You could poste some images of it maybe it can be done online,,, by the NikonGear community ;D
Yesterday I could not get to it, but I now have some pictures in this thread:
http://nikongear.net/revival/index.php/topic,2827.new.html#new (http://nikongear.net/revival/index.php/topic,2827.new.html#new)
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I only now found this thread today - having been very busy lately - and am very interested in trying to have my
Fishey 16mm/2,8 chipped
plus , less urgently my
Micro 55mm/2,8
105mm/2,5
all AI-S lenses and in my psession for very looong time
I myself am just to much of a coward to do it myself without help
and really looking ahed to meeting you all in person
best, Martin
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Should be pretty trivial all of them.
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OK, preparations for the NG Scotland Event have commenced. I'll be in Scotland already May 1st so need to know what lens(es) people are keen on having CPU-modified in order to bring the appropriate parts.
Please just add your name and the lens(es) to this thread. No obligations, monetary or otherwise, are incurred.
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16/2.8 AI-s
20/3.5 UD
35/1.4 N (9-blade)
105/2.5 PC
55/1.2 SC
28/2.0 NC
135/3.5 QC
In order of priority/time/money/etc...
All are factory AI-d
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I know Bjørn will go through these with a firm scrutinizing eye - But 55mm 1.2 is a no chipping lens :)
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The chipping of 55mm Ai could be done similar to the 50mm 1.2 Ais that is with a Dandelion CPU inserted inside the F-Mount, I have already half half promised I will try to modify his 50mm 1.2 Ais when we meet up for NikonGear does Photokina 2016,,, Maybe you will attend this year as well Chris, then I could also see to your other patients,,,
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Here are my ''patients''...
According to the same Chris Dees' criterias :
# 105mm f/4 micro nikkor;
# 90mm voigt apo lanthar;
# 60mm f/2.8 Leica R macro-elmarit (F mount converted) but not sure it's possible (no mechanical connection with Nikon body). I will post a picture of the rear lens.
# 300mm f/4,5 ED (no IF) nikkor;
# 28mm f/2 AI nikkor.
I would love to chip my 55mm f/1,2, but I know it's hard to do (grind the rear element).
Cheers, Francis.
Below, rear Leica macro elmarit.
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Yes 'touching' the outside of the rear element is required ;)
There is a break-down here:
http://nikongear.net/revival/index.php/topic,276.msg38641.html#msg38641 (http://nikongear.net/revival/index.php/topic,276.msg38641.html#msg38641)
So yes a high risk operation,,,
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BTW - WOW Some nice glass your are bringing! An honor to work on such fine glass, some the Nikkor crown jewels listed here already ;)
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Thank you, Erik, to remind me the thread where I saw ''butchering the glass'' ! ;D
Also, I saw the the Leica telyt that You and Bjørn have F mount converted. So, that gives me some hopes about my Leica macro elmarit. :)
However, I guess the f/stops are not mentioned in exifs as there is no mechanical connection with Nikon bodies ?
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The chipping of 55mm Ai could be done similar to the 50mm 1.2 Ais that is with a Dandelion CPU inserted inside the F-Mount, I have already half half promised I will try to modify his 50mm 1.2 Ais when we meet up for NikonGear does Photokina 2016,,, Maybe you will attend this year as well Chris, then I could also see to your other patients,,,
Thanks Erik, there's no hurry.
I already marked the date of Photokina 2016 in my agenda, just find a good moment to tell my wife. :D
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Thank you, Erik, to remind me the thread where I saw ''butchering the glass'' ! ;D
Also, I saw the the Leica telyt that You and Bjørn have F mount converted. So, that gives me some hopes about my Leica macro elmarit. :)
However, I guess the f/stops are not mentioned in exifs as there is no mechanical connection with Nikon bodies ?
The CPU for this lens has to be "G". Meaning you dial in the aperture you wish to shot at, keep the lens wide open for maximum accuracy in light metering, then just flip the aperture to the wanted setting and shoot. For pre-set lenses this takes almost zero additional time, without any preset ring it is a little more cumbersome.
If you feel the actual aperture is not worth recording and don't mind the lowered accuracy in metering, you can dial in the wide-open aperture value and set the lens directly to the shooting aperture. Will also work because the camera now just thinks the sun has gone behind a cloud :D
Modifying your Leica lens, as seen in the pictures posted previously, is a breeze.
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Modifying your Leica lens, as seen in the pictures posted previously, is a breeze.
That's a good news, Bjørn, can't wait ! :D
So far, whichever stop I set, the exposure was always correct (Aperture mode).
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Is chipping the only activity that will be going on or is more basic lens maintenance also in the cards?
I could do with some help (i.e. closely supervised guidance) with a stiff AI 35/1.4 and an AF 16/28 with oily aperture blades.
In case someone is willing to help, info on what I should bring for the task is also needed.
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Hopefully we'll be doing some photography too?
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Hopefully we'll be doing some photography too?
Indeed!
I meant during the time when some intend to do some lens DIY.
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As long as there are enough suitable JIS screw drivers available, everyone interested can try their hand at basic maintenance ...
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I have a few I would like done ....but I can see this is popular, and we need to take some photographs :).
So I would be happy if just get my 105mm f2.5 AIS chipped this time.
Cheers
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I'll bring plenty of hardware for chipping with me. So no fears.
We'll drill holes everywhere....
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As long as there are enough suitable JIS screw drivers available, everyone interested can try their hand at basic maintenance ...
Great, thank you Bjørn.
Looks like it could be very instructive :)
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I'll bring plenty of hardware for chipping with me. So no fears.
We'll drill holes everywhere....
Cool ! :)
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We could set up a "do it yourself" shop ... People can take their Dremel with them and we all pitch in for a crate of beer and/or whisky.
My tools are ready to be packed...
Now, a practical question for Bjørn and Erik: which currency would you prefer : GPB or Euros ? (I haven't got any Danish or Norwegian crown.. ;D).
Bank transfert is of course possible.
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Paypal in any currency will do for me.
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All right, then !
See you Saturday, guys !
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As announced the chipping itself is for free, but for the parts; CPU contact block, pins and screws you pay Bjørn
A small donation, say 10£ pr lens for consumerables, grinding discs, files and drills would be appreciated :)
Looking forward to meet up with all of you :)