70D - To MFA or Not to MFA That's the Question

Started 7 months ago | Discussions thread
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Myer
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70D - To MFA or Not to MFA That's the Question
7 months ago

I read that part of the manual and Canon's position is that you really shouldn't have to adjust unless . . . .

I've read in other places MFA is your fine adjust and will invariably make your focus sharper in only slightly.

I've read several articles each explaining a different approach to MFA.

My lenses are 15-85 and 70-300L.

I did a non-scientific test which probably has no value.

I placed a page of print on the floor.

Stood at a 45 degree angle (app).

Set to ISO200

Set the lens to maximum wide angle.

Set the shutter speed so that the lens was wide open.

Shot a picture.

Then set the lens to maximum telephoto.

Set the shutter speed so that the lens was wide open.

Shot a picture.

Then I redid the whole process with the other lens.

I checked all 4 images.

I all cases the center lines were sharp.

In all cases when I move higher (back) or lower (front) the print move from being sharp to being blurred. The blur for front and back started about the same distance from the sharp lines and decreased at about the same rate.

Did all that tell me anything?

Now, any suggestions what I should do next other than use the camera which I've been doing (being retired I have time on my hands - maybe too much)?

Canon EOS 70D
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