08-13-2016, 09:25 PM
Obican: This is why I never switched screens. I've read too many stories of they screens having to be shimmed, and I just figured it was too much trouble to go through if I wasn't going to be sure of the result. Here is a thought though: I don't know what "Way off is, but don't forget the diopter adjustment may be able to compensate for that? I think that screen is for your eyes only and will not effect the cameras AF which is located below the flange. If so, -2 to +2 covers a pretty broad range. Please correct me if I'm wrong. I accidental popped something out of the screen area of an EOS film camera. But it still had no problem AF-ing.
@ brightcolors - Here is an interesting fact. The famous Dandelion chips and the notorious Chinese chips are offered with programmable capability. And the claim is that they allow MFA on a camera like a 60D that does not have in camera MFA (micro focus adjustment). The question, naturally is how? That question in turn leads to how do cameras like the 70D do it?
We know the camera does the AF-ing. We know the camera stores the AF MFA information based on a unique lens identifier. So, I guess the camera simply remembers what you tell it. So, the big news is now you can MFA manual focus lenses, and strangely enough you can use MFA even with cameras that do not make this feature available.
I have to admit:
- I question how good legacy glass really is.
- I suspect a lot of times the problem is me.
- If legacy glass is so inferior, than why did Canon disable AFC for manual lenses and require Chips on some cameras or the camera will pretend there is now lens there. Is a modern top lens maker afraid it can't compete with 30-50 year old lenses. If they believe that they need to up there game!
@ brightcolors - Here is an interesting fact. The famous Dandelion chips and the notorious Chinese chips are offered with programmable capability. And the claim is that they allow MFA on a camera like a 60D that does not have in camera MFA (micro focus adjustment). The question, naturally is how? That question in turn leads to how do cameras like the 70D do it?
We know the camera does the AF-ing. We know the camera stores the AF MFA information based on a unique lens identifier. So, I guess the camera simply remembers what you tell it. So, the big news is now you can MFA manual focus lenses, and strangely enough you can use MFA even with cameras that do not make this feature available.
I have to admit:
- I question how good legacy glass really is.
- I suspect a lot of times the problem is me.
- If legacy glass is so inferior, than why did Canon disable AFC for manual lenses and require Chips on some cameras or the camera will pretend there is now lens there. Is a modern top lens maker afraid it can't compete with 30-50 year old lenses. If they believe that they need to up there game!