Expanding dottune values to 150

[martinMK]

Is there any way to expand dottune values from 100 to 150? I have some old lenses that need a lot of focus correction. 100 is not cutting it.
I downloaded the source files and there is a range expand integer in dottune.c is this the range expand factor that overrides canon default 20?
Can some help me compile this module. Tried 2 times to download cygwin. Failed.

[chris_overseas]

It sounds like the maximum theoretical values are +/-127 (as per http://www.magiclantern.fm/forum/index.php?topic=4648.msg27254#msg27254), though I doubt that's ever been tested. As far as I know you're the first person that's ever needed to go beyond 100.

[garry23]

I know this link has been posted before: but it represents good background.

http://learn.usa.canon.com/resources/articles/2011/af_microadjustment_article.shtml

[martinMK]

It is mostly for old lenses M42/p6/ medium format etc..

I would like to have focus confirm in the viewfinder. Most of my work is done in studio and most of the time I work through the viewfinder.

I can get razor focus with live view but it slows me down drastically.

[Audionut]

I thought there was a reason why values over 100 were not valid, but can't recall now.  I recall others trying (or requesting at least).  Have you read through the dottune thread?

[martinMK]

I think it was me in dottune thread asking 
I have few problems compiling. I had made changes to the dottune code.. but can't compile/make. I have problems with cygwin..

[nikfreak]

You might want to use a prebuilt vm. I linked one last year:
http://magiclantern.fm/forum/index.php?topic=7579.0