Thank you for your explanation. So, the Optix is different in the sense that it's actually easier to change. What about micro AF adjustment, is it as easy as changing the aperture value?
Well, just like the actual micro AF adjustment built into Canon cameras, it needs some experimentation. I tried several settings, and after a couple of days ended up with the default - i.e. no adjustments needed, factory setting. I have a 100% accurate split focusing screen, so that makes it easier to adjust or play around with the setting.
Adjusting the AF Confirm takes more time, but is also easy. Furthermore, once one has set it, one will no longer need to set it again. In all adjustments, DOF button is the key. For adjusting AF Confirm:
There are 2 digits for AF Confirm adjustment, a range of 00 to 99. The default factory setting is 50. To finetune, try 55, 60, 75, etc. or the other way around 45, 40, 35 etc.
How does one enter these numbers ? We use the aperture wheel again. All one has to remember is that f/1.4 aperture is equal to zero. For the other numbers, one does not have to remember anything, just take the 1st digit of aperture as the number. So f/2.0 or f/2.8 are both equivalent to the number 2, f/4 is 4, f/5.6 is 5 and so on.
DOF x 3, roll wheel to select f/14 aperture, press DOF
Assume we want to try setting 70. So after doing the above :
Roll aperture wheel to select f/7.x, press DOF - this means digit 7
Roll aperture wheel to select f/1.4, press DOF - this means digit 0
That's it, check AF confirm focus if it suits you. No, then repeat procedure until you get it.
Try again next day to make sure.
It is easy once one starts doing it, intuitive. After setting, one can forget all about it already. The most used functions will then be the aperture and focal length setting.
It used to be that happypagehk was the only one selling this, now I realize there are others who have adapted the Optix chip. Even for Leica-R lenses, etc. All on eBay.
Anyway, here is one seller. Please watch the short video and see how it is done.
http://cgi.ebay.com/Contax-Canon-Ad...Accessories&hash=item5889c2e609#ht_3127wt_906