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Aperture comparison of micro-four thirds vs DSLR

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#1 FranzoMCK

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Posted 02 January 2013 - 11:53 AM

Hi,
recently I got my new Olympus OM –D with the 12-50 mm lens kit and a Nauticam Housing, it is my first time with a mirrorless micro 4/3 system.
I would like to know if the depth of field and the f stops are similar to the DSLR cameras?
Thanks.

#2 FranzoMCK

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Posted 04 January 2013 - 04:44 AM

Depth of field is also affected by the focal length and sensor format.
My question originates when I was reading Martin Edge, The Underwater Photographer, Fourth edition 2010. . Page 152 , and he makes the following postulate:
Being much smaller than SLRs in terms of lens and sensor size, etc., apertures have different values. For readers using digital compacts underwater, I would like you to relate a compact aperture of f4 as being comparable with f8 on an SLR

Since 4/3 is an intermediate format between compact and DSLR, could I assume then that f 4 in Compacts is similar to f 5.6 in 4/3 and f8 in DSLR?

thanks again






#3 Alex_Mustard

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Posted 04 January 2013 - 04:51 AM

As an approximation you are correct.

This shot with a fisheye on M43 at f/5.6. To achieve similar depth of field and corner sharpness I would have used f/8-9 on DX (APS-C) and f/11-13 on FX (full frame).

Posted Image

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Nikon D4 (Subal housing). Nikon D7100 (Subal housing). Olympus EPL-5 (Nauticam housing).


#4 FranzoMCK

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Posted 04 January 2013 - 05:57 AM

Thank you Dr. Alex, you are the Boss !!!





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