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Proposing changes to terminology and lens FOV as per #3255

Open sandyol55 opened this issue 2 years ago • 4 comments

First git commit so apologies in advance for any errors.

sandyol55 avatar Jan 21 '24 17:01 sandyol55

Closes #3255

aallan avatar Jan 22 '24 11:01 aallan

Ping @davidplowman for verification.

aallan avatar Jan 22 '24 11:01 aallan

The whole field-of-view vs. angle-of-view vs. field-angle vs. angular-field-of-view all seems rather confusing! I suppose angle-of-view or field-angle is probably better for angular measurements because field-of-view is sometimes regarded as being a distance, not an angle?

Anyway, changing the terminology seems fine to me. I notice the actual numbers have changed too - do I understand that someone has obtained or measured more accurate numbers?

davidplowman avatar Jan 22 '24 13:01 davidplowman

From an 'optics' background FOV is generally the most common term to describe the property.

The values have been changed to reflect the predicted FOV values when a lens of each focal length is used with the actual HQ and GS sensor format dimensions. The previous values appeared to be the FOVs obtained if the lenses were to be used with sensors that matched the maximum image format that the lenses had been designed for.

Edit: #3255 also had a comment on correcting the F/# in the 16mm table which I'd missed in the commit/PR. In the Aperture entry the F1.4 to 1.6 should, I believe, be F1.4 to F16.

sandyol55 avatar Jan 22 '24 14:01 sandyol55

Good to merge.

nathan-contino avatar Mar 01 '24 17:03 nathan-contino