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Advantages/Disadvantages to sending in camera along with lens for calibration?

Started Dec 21, 2013 | Discussions thread
WilbaW
WilbaW Forum Pro • Posts: 11,643
Re: Advantages/Disadvantages to sending in camera along with lens for calibration?

Y Hafting wrote:

For the matter of the test chart, id say make sure your focus target is vertical. Focussing on something that is 45 degrees to the camera is an almost sure way to have it focus on the wrong spot.

If that something has detail up and down the slope, yes, you'll get focus on the nearest detail, but a proper focus target designed to be used that way is perfectly fine.

It is good to have a distance scale at 45 degrees or so, but the focus target should be aligned with the focus plane.

A perpendicular target is best if it's not close, and it that case you want a scale at a lower angle, seeYou Can't Test Autofocus with a Slanted Target  in Digital Photography Myths.

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