Oly 17mm F1.8 DOF scale

Started 1 month ago | Discussions thread
Peter Heckert2
Peter Heckert2 Contributing Member • Posts: 978
Re: Oly 17mm F1.8 DOF scale
2

For rather close distances probably all DOF calculators give unreliable results, because at close distances the lens probably actually has not 17mm but less.
Without knowing the lens construction this cannot be calculated exactly.
So when it is about close distances I would not be too surprised.

Edit:

This lens has 17mm for minimum distance and max magnification.
g/b=0.08, g+b=250,1/g+1/b=1/f, solve for f - Wolfram|Alpha (wolframalpha.com)

However the DOF calculator could assume something else.

 Peter Heckert2's gear list:Peter Heckert2's gear list
Olympus E-M5 III Panasonic Lumix G Vario 100-300mm F4-5.6 OIS Olympus 12-40mm F2.8 Pro Olympus 40-150mm F2.8 Pro Olympus 100-400mm F5.0-6.3 IS
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