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  Previous versions of jeetsukumaran's message #14790513 « FM Lens test for Centering (Mount tilt / swing) »

  

jeetsukumaran
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Re: FM Lens test for Decentering / Tilt


I've having difficult understanding what this means: "... but you will be actually taking a picture of the BOTTOM RIGHT and TOP RIGHT areas (Red Circle) since the camera is now upside down."

I guess it seems to me that the "picture" will be whatever is in the frame, which is largely the same throughout and includes the red circle and the subject (camera orientation nonwithstanding) ? I get that the relative positions of these will shift with respect to the camera's frame, the subject moving across each corner in succession. Is that all it means?

Or, to phrase it another way: is the technique to just put the subject in each corner successively by rotating the camera 4 ways?

EDIT: Perhaps someone could be kind enough to post examples o each of the full 4 images taken, in the orientation, etc. that they were taken (i.e., no cropping, zooming, or rotating) to help out my tired old mind? The images can be downsized greatly, of course, as they are not so much to assess the lens quality as the test itself.



Mar 14, 2019 at 09:06 PM
jeetsukumaran
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Upload & Sell: Off
Re: FM Lens test for Decentering / Tilt


I've having difficult understanding what this means: "... but you will be actually taking a picture of the BOTTOM RIGHT and TOP RIGHT areas (Red Circle) since the camera is now upside down."

I guess it seems to me that the "picture" will be whatever is in the frame, which is largely the same throughout and includes the red circle and the subject (camera orientation nonwithstanding) ? I get that the relative positions of these will shift with respect to the camera's frame, the subject moving across each corner in succession. Is that all it means?

Or, to phrase it another way: is the technique to just put the subject in each corner successively by rotating the camera 4 ways?



Mar 14, 2019 at 08:54 PM





  Previous versions of jeetsukumaran's message #14790513 « FM Lens test for Centering (Mount tilt / swing) »