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Author Topic: Focal length of Canon TS-E lens on MFDB?  (Read 178 times)

lowep

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Focal length of Canon TS-E lens on MFDB?
« on: October 30, 2019, 06:25:37 am »

I hear some Canon TS-E lenses (like the 90mm f2.8) have an image circle capable of covering a larger (approx 645 size) sensor. When this is done, what would be the 35mm equivalent focal length?
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Doug Peterson

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Re: Focal length of Canon TS-E lens on MFDB?
« Reply #1 on: October 30, 2019, 06:40:02 am »

Focal length is focal length.

So a Canon 90mm looks the same as a Rodenstock or Schneider 90mm.

For equivalent FOV between formats I suggest to skip the math and use our tool:
https://www.dtcommercialphoto.com/support/lens-visualizer-tools/

Aram Hăvărneanu

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Re: Focal length of Canon TS-E lens on MFDB?
« Reply #2 on: October 30, 2019, 07:25:50 am »

If you use a 90mm lens on a 44x33 sensor, the horizontal field of view will be like a 74mm lens on full frame. The vertical field of view will be like a 66mm lens.

If you shift the lens to do some image stitching, the total field of view that you can capture is exactly the same for every sensor size (but you might need more or less images to capture the same field of view).

I created this table https://xw.is/wiki/Focal_length_equivalents_between_formats.
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