Author Topic: Scotland NG Gathering 2016: Lens Chipping Service  (Read 14963 times)

Erik Lund

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #45 on: March 22, 2016, 17:15:23 »
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,,,
Erik Lund

rosko

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #46 on: March 22, 2016, 18:03:18 »
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.
Francis Devrainne

Erik Lund

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #47 on: March 22, 2016, 18:14:13 »
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
So yes a high risk operation,,,
Erik Lund

Erik Lund

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #48 on: March 22, 2016, 18:22:09 »
BTW - WOW Some nice glass your are bringing! An honor to work on such fine glass, some the Nikkor crown jewels listed here already  ;)
Erik Lund

rosko

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #49 on: March 22, 2016, 18:59:51 »
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 ?
Francis Devrainne

Chris Dees

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #50 on: March 22, 2016, 20:55:01 »
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
Chris Dees

Bjørn Rørslett

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #51 on: March 22, 2016, 21:01:18 »
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.

rosko

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #52 on: March 22, 2016, 21:49:34 »
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).
Francis Devrainne

simato73

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #53 on: April 14, 2016, 22:50:57 »
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.
Simone Tomasi

Bjørn Rørslett

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #54 on: April 14, 2016, 22:55:16 »
Hopefully we'll be doing some photography too?


simato73

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #55 on: April 14, 2016, 22:59:27 »
Hopefully we'll be doing some photography too?

Indeed!
I meant during the time when some intend to do some lens DIY.
Simone Tomasi

Bjørn Rørslett

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #56 on: April 14, 2016, 23:02:39 »
As long as there are enough suitable JIS screw drivers available, everyone interested can try their hand at basic maintenance ...

BEZ

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #57 on: April 14, 2016, 23:17:05 »
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
Bez

Bjørn Rørslett

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #58 on: April 14, 2016, 23:20:03 »
I'll bring plenty of hardware for chipping with me. So no fears.

We'll drill holes everywhere....


simato73

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Re: Scotland NG Gathering 2016: Lens Chipping Service
« Reply #59 on: April 14, 2016, 23:29:58 »
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 :)
Simone Tomasi