Does the lens require MFA ?

Started Feb 14, 2013 | Discussions thread
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elfroggio MOD Senior Member • Posts: 2,608
Re: Does the lens require MFA ?

anand53 wrote:

This is unprocessed RAW image. 7D; 100-400 L IS USM + 1.4 X TC III. Aperture Priority. SS O.5/ f 8/ISO 640; AWB; Neutral PS.

Would appreciate to know if my lens requires MFA ?

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Save the tiger

It is extremely difficult to see if your lens/camera and the lens/tc/camera combination requires MFA from a single photo.

You need to get a chart and a controlled environment that guarantees that the focusing chart and your sensor are exactly parallel. Without the parallel between the sensor and the focusing cart you are only doing guess work. That's why using something like a brick wall doesn't work.

There are free charts on the Internet like:

BTW, your tagline is "Save the tiger". What does it mean?

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