Thank You all guys.
The was not problem with my lens.
Some problems with my brain.
After some experiments i have adjusted lens to +20, and now it is fine.
Sorry for stuppid questions.
A.Erekhinski wrote:
Thank You all guys.
The was not problem with my lens.
Some problems with my brain.
After some experiments i have adjusted lens to +20, and now it is fine.
Sorry for stuppid questions.
Mind sharing what you did wrong. I never have to do any micro adjustment with my N lenses so far.
Glad your lens is performing well after the lens micro adjustment.
As I said before I had a similar problem with my copy front focusing on objects greater than 10ft away until I programmed some micro adjustment into the lens.
The adjustment in Conurus's firmware in the lens conversion is more powerful than normal Canonin camera adjustment as you can make separate adjustments for close, far and middle distances.
I also wonder if differences between 1ds3 AF and 5D2 cause this with this lens?
Except my other N lenses, 85/1.4 and 70-200 didn't need microadjustment.
ManWearPants
What I did wrong? - First of all, I did not see any frontfocus, maybe because I checked the lens not enough thoroughly. So I went to panic instead to do more series of test.
But after reading some answer here on forum, I repeated tests again and again, and, of course, received evidence about frontfocus. Unfortunately I did not find anywere the correlation between the value of frontfocus as I see it with LensAligne ruler and the value which I need to set for microadjustment, therefore I have to try a number of different value. I started with 38, tried 30, 25, and stopped at 20.
wayne seltzer
I executed the adjustment with 5DII for entire focusing range, shortly checked with it, then tried the lens with 1DsIII at different distances. After adjustment the lens works fine on both cameras, but on 5DII there was some misses time to time, not on 1DsIII . (I used only central AF point so far).
For simplicity, u can contact Bo-ming. He keeps a database of all the lenses he converted and shld be able to tell u why your lens require such high MA values. I would assume he tests all his converted lenses on 5D2.
ManWearPants wrote:
...u can contact Bo-ming...
There is no necessity because lens works properly now.
I assume previous owner may have did some experiments with microadjustment, as when I tried adjustment first time, "one shot" indicator of camera blinked many times.
A.Erekhinski wrote:
Thank You all guys.
The was not problem with my lens.
Some problems with my brain.
After some experiments i have adjusted lens to +20, and now it is fine.
Sorry for stuppid questions.
Your questions are definitely not stupid. This is one of the great things about FM - people like to help! I am glad that you got it fixed, don't forget to post images!
Thank you, Andrew.
Pictures will be by all means, but a little later -
now there is snowless, gray, dusty winter, so there are virtually nothing to shot.
Usually in early spring, we are heavy snowfalls, and I hope to try the lens extensively.
