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Format Equivalent Depth of Field: a Non-Alcoholic Demonstration (Micro Four Thirds vs Full Frame)

Making Sharp Images previously discussed several key areas involving depth of field:

I find these subjects challenging to explain in ways avoiding jargon and too-involved technical aspects, and they took me myself some years to grok. Yet they are extremely useful in practice, particularly for those shooting cameras of different format sizes (e.g., Micro Four Thirds and/or APS-C vs full frame 35mm vs medium format).

Real lenses on real cameras show it best

But now I am really gruntled* to demonstrate and thus demystify how depth of field has its f-stop format-equivalence.

Format-Equivalent F-Stop: Micro Four Thirds vs 35mm Full Frame (Pellegrino)

Includes standard, HD, UltraHD and also full-res MFT (4608 pixel wide) aperture series from wide open through f/11 for your viewing pleasure.

Gear for this piece: Olympus OM-D E-M1 with Panasonic Leica 25mm f/1.4 comparing to the Leica M Typ 240 with Leica 50mm f/2 APO-Summicron-M ASPH.

* Nearly as gruntled as my purring house cat proudly presenting a fresh-caught garden gopher on the doormat. Good kitty. Mitigated by my wife getting disgruntled with me for borrowing all her Pellegrino. I explained that a case of red wine with just the right label (ahem) would be even better, but that idea flew about as well as a hog.

Depth of field at f/2 (MFT)
Olympus OM-D E-M1 + Panasonic Leica 25mm f/1.4 @ f/2

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