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Grinding the base of nikkor lenses
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PostPosted: Mon Apr 30, 2007 11:57 pm    Post subject: Grinding the base of nikkor lenses Reply with quote

I am considering grinding the base of the Nikkor wideangles that I have in order to make them mountable on the 5D.
These are quite beaten-up lenses already so surely not going to be ever elected as surviving representants of the species.
The part that I am planning to grid is the one that prevents them to be mounted, that is, the solid part that protrudes from the black base of lenses such as

24mm/2.8
28mm/2
28mm/3.5

I mean NOT the lug (the part that moves and serves for the automation), only the solid fixed part that protrudes and server (presumably) as back glass and lug protection.

I am 100% sure that the part I am planning to grind has no use for mounting the lens on Canon cameras. What I am wondering about instead, is if this part in indispensable to mount the lenses on the Nikon cameras, or if it's just a protection that can be removed without problems.

Does anybody know?


PostPosted: Tue May 01, 2007 12:38 am    Post subject: Reply with quote

Excuse me, sir, you'll have to contact Orio or Attila, they're the
administrators of this site and they might know... Laughing

Orio, my pick would be to ask Rick Oleson. Or, grind the one that is
most expendable and see....

Bill


PostPosted: Tue May 01, 2007 5:38 am    Post subject: Reply with quote

Orio,
Along with what Chris and I have suggested, here are some points to
ponder courtesy of www.despair.com :

MISTAKES
It could be that the purpose of your life is only to serve as a warning
to others.

LOSING
If at first you don't succeed, failure may be your style.

Just kidding, but seriously, do post your results.
Bill


PostPosted: Tue May 01, 2007 12:40 pm    Post subject: Reply with quote

COMPLETE SUCCESS !!!!

I have ground the 24mm f/2.8, and now:

1- I can mount it on the 5D

2- I can focus it to infinity with it

3- I can still mount it on the FM2 and keep the exposure automatism

YO-HOO!!!!!!!

I have learned two things from this experience:

a- how to succesffuly grind a lens
b- that the past tense of "to grind" is "ground"

Now, to quote Dr. Emmett Brown, I can dedicate the rest of my life to solve the second of the Universe's big mysteries:

THE WOMEN .

p.s. I will publish a tutorial on my website. Very Happy


PostPosted: Tue May 01, 2007 12:52 pm    Post subject: Reply with quote

Here's the first pic with the NIKKOR-N-C Auto 24mm/2.8 on the 5D



p.s. the moire on the window blinds is due to resize.


Last edited by Orio on Tue May 01, 2007 1:10 pm; edited 1 time in total


PostPosted: Tue May 01, 2007 1:09 pm    Post subject: Reply with quote

Congrats! And a great pic, too! Is the "Mikkor" a Korean copy? Laughing
Good choice for experiment if it was... Wink Looks like you'll be doing
some more grinding.

Bill


PostPosted: Tue May 01, 2007 1:12 pm    Post subject: Reply with quote

katastrofo wrote:
Is the "Mikkor" a Korean copy? Laughing
Bill


What? Where? Cool Laughing


PostPosted: Tue May 01, 2007 1:17 pm    Post subject: Reply with quote

katastrofo wrote:
And a great pic, too!


Yes, in fact there is just a little barrel distortion, much acceptable, I was fearing worse, I think it's quite remarkable for a non-Zeiss superwide!

The color saturation is a bit on the poor side compared to Distagons, Flektogons and MIRs, but I was expecting this, I am not a fan of Russian and German lenses without reason!


PostPosted: Tue May 01, 2007 3:55 pm    Post subject: Reply with quote

I have also successfully ground the 28mm. f/2 Very Happy