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05-17-2016, 12:04 PM   #1
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Sensors & One Focal Length - Comparison (Pentax Cameras)

I often read about the effect of focal lengths used with different cameras / different sensor sizes.

Wanted to see / understand the effects in more detail. So I calculated some key numbers for different Pentax cameras and a single fictional focal length 15mm. Sensor sizes (mm dimensions) and pixel counts I got from product descriptions. Thought the results could be interesting for you too. Hope I calculated all values correctly.


Especially the comparison of angle of view looks interesting to me. Also what focal length do I need on which camera type to get an angle of view of 90.

05-17-2016, 12:06 PM   #2
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You may find this interesting as well, nice big table:
The Crop Factor Unmasked - Articles and Tips | PentaxForums.com

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05-17-2016, 12:15 PM   #3
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QuoteOriginally posted by Adam Quote
You may find this interesting as well, nice big table:
The Crop Factor Unmasked - Articles and Tips | PentaxForums.com
Thank you. This fits exactly my research!
05-17-2016, 01:43 PM   #4
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You have FF-equiv. FL in mm - what exactly do you mean by that? Do you mean equivalent FoV?

05-17-2016, 09:22 PM   #5
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QuoteOriginally posted by Imp Quote
You have FF-equiv. FL in mm - what exactly do you mean by that? Do you mean equivalent FoV?
It answers the question "What focal length would you need on FF to get the same FoV as on the "selected" (column) camera using a 15mm lens." Sound's a bit weird and complicated - I know.

Last edited by acoufap; 05-17-2016 at 09:27 PM.
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