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Home โ†’ Reviews โ†’ Cameras and Lenses โ†’ Olympus OM-D E-M1 Review

Olympus OM-D E-M1 Review

By Nasim Mansurov 30 Comments
Last Updated On April 11, 2020

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ISO Performance at low ISOs (ISO 200-800)

Let’s take a look at how the Olympus OM-D E-M1 performs at low ISOs. Here are some 100% crops at ISO 100, 200, 400 and 800:

Olympus OM-D E-M1 ISO 100 Olympus OM-D E-M1 ISO 200

As expected, both ISO 100 (boost) and 200 are very clean.

Olympus OM-D E-M1 ISO 400 Olympus OM-D E-M1 ISO 800

ISO 400 adds a tiny bit of noise, but the image is still very clean. Pushing to ISO 800 we now see some more noise, but there is still no loss of details in the image, including in the shadows.

Olympus OM-D E-M1 Sample Image #6
E-M1 + LEICA DG NOCTICRON 42.5/F1.2 @ 43mm, ISO 200, 1/200, f/1.8

High ISO Performance (ISO 1600-25600)

Let’s see what happens when ISO is boosted to much higher levels:

Olympus OM-D E-M1 ISO 1600 Olympus OM-D E-M1 ISO 3200

ISO 1600 increases the amount of noise and the grain size now looks bigger and more noticeable, especially in the shadows. Increasing ISO to 3200 nearly doubles noise and now we are starting to see some artifacts in the shadows. There is a little bit of color loss in the shadow areas. Both ISO levels are very usable though and a single pass of noise reduction software will deal with it pretty well, since most details are preserved.

Olympus OM-D E-M1 ISO 6400 Olympus OM-D E-M1 ISO 12800

Further increasing ISO to 6400 adds a lot more noise and now we are at a point, where we are starting to lose details in the shadow area. And by ISO 12800, the image looks pretty much unusable to me, although down-sampling the image might produce acceptable results for the web. The last available ISO level is 25600, which is way beyond my comfort level:

Olympus OM-D E-M1 ISO 25600

I would never use such high ISO level on the OM-D E-M1, because there is a heavy loss of detail and color throughout the image.

Let’s see how it fares against other cameras. Select the next page below.

Olympus OM-D E-M1 Sample Image #17
E-M1 + LEICA DG SUMMILUX 25/F1.4 @ 25mm, ISO 200, 1/125, f/1.4

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