AF microadjustment tricks

[Ken Foss]

Arash, I assumed the difference probably had something to do with the registration of the transmissive lcd screen in the viewfinder. The difference between the focus point in the viewfinder and the focusing point on the LV screen is about 2 inches with my 300mm lens at 75 feet. I am probably nit-picking but I was curious if others see the same thing. This could definitely be problematic if it was any more. Ken

[arash_hazeghi]

Arash, I assumed the difference probably had something to do with the registration of the transmissive lcd screen in the viewfinder. The difference between the focus point in the viewfinder and the focusing point on the LV screen is about 2 inches with my 300mm lens at 75 feet. I am probably nit-picking but I was curious if others see the same thing. This could definitely be problematic if it was any more. Ken

yes Ken, it's the transmissive LCD screen that is right behind focusing screen. 2" can cause issues, I will check with mine tonight and let you know. Good catch!!!

[gschlact]

Aresh -
thanks for the most excellent write-up.
I had noticed that your AF / MF slider changed within the EOS utility.
I might have missed it, but can you please explain? AFter thinking about it, it doesn't make sense to me that you would want the new test shot to be captured in manual mode, but rather only after you dialed in your step-adjusting into the MF setting in the camera and did a new AF.

Thanks again,
Guy

[arash_hazeghi]

Aresh -
thanks for the most excellent write-up.
I had noticed that your AF / MF slider changed within the EOS utility.
I might have missed it, but can you please explain? AFter thinking about it, it doesn't make sense to me that you would want the new test shot to be captured in manual mode, but rather only after you dialed in your step-adjusting into the MF setting in the camera and did a new AF.

Thanks again,
Guy

Hi Guy,

Not sure which slider you are talking about, everything is done with AF here...

[gschlact]

Hi Guy,

Not sure which slider you are talking about, everything is done with AF here...

Look at your Post #3 and Post #8 with the screen capture of the EOS Utility control panel. I am referring to the 'slide' that changes AF to MF right next to the shutter button.

-Guy

[arash_hazeghi]

Look at your Post #3 and Post #8 with the screen capture of the EOS Utility control panel. I am referring to the 'slide' that changes AF to MF right next to the shutter button.

-Guy

Oh I see, you are right that must have been an error, that slider is inactive anyway (will only work if you toggle the MF switch on the lens). always set the lens switch to AF for MA.

Best

[Daniele Morasca]

Hi Arash,

I've found the post really interested. I'll test my "home made calibrated" 300 2.8 in the field in the next week-end.

I would like to know if I could translate in italian your method, to share to my Italian friends.

Thanks for the effort.

[arash_hazeghi]

Hi Arash,

I've found the post really interested. I'll test my "home made calibrated" 300 2.8 in the field in the next week-end.

I would like to know if I could translate in italian your method, to share to my Italian friends.

Thanks for the effort.

Feel free to do so Daniele, I will be happy if it will be of any use to my photographer friends, lol but do leave a link to BPN website, sure more hits will make master James happy :D can't believe this has had 5000 hits!!!!