Why I Prefer the E-5 over the OM-D

Started Mar 27, 2013 | Discussions thread
dave gaines
dave gaines Veteran Member • Posts: 9,183
Why I Prefer the E-5 & ISO 100

I have an Olympus C-8080 with ISO 50. The max ISO is 400 but I rarely use it. ISO 200 is the max acceptable on that camera. It also has a 2/3" sensor and a minimum aperture of f/8. The min aperture was due to diffraction limits for the sensor size, which is true for all small sensor P&S. The C-8080 camera needs a low ISO 50 so you can open the aperture and still get an exposure in bright light.

The E-5 needs a low ISO 100 for similar reasons. The diffraction limit is around f/13 for 4/3. You need a lower ISO to avoid smaller apertures. I suspect the OM-D has the same diffraction limits, so why it doesn't have ISO 100 is a mystery to me. Most of the lenses are slower so you need a faster ISO to get an equivalent exposure.

ISO 100 on the E-5 is good for reduced noise, but the DR is less than at ISO 200. I use it for tripod work where long exposure is not a problem. I use it when I want more detail from the shadows and DR is not an issue due to uniform lighting in the scene.

Contrary to what some people who've never owned an E-5 want to theorize, the exposure is shifted 1 full stop. You have to shift exposure 1 stop or you get blacker, less detailed blacks and you won't peg the whites to the right (expose to the right) if you don't adjust exposure, compared to ISO 200 or ISO 400.

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 dave gaines's gear list:dave gaines's gear list
Olympus C-8080 Wide Zoom Olympus E-330 Nikon D800E Nikon AF-S Nikkor 70-200mm f/2.8G ED VR Nikon AF-S Nikkor 14-24mm f/2.8G ED +7 more
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