Comparison of the Olympus M.ZUIKO 17mm f/1.8 Prime Lens from aperture f/1.8 to f/5.6 for overall image apperance, distortion and vignetting, center sharpness, horizontal resolution, vertical resolution and diagonal resolution, off-center elements, corner elements and chromatic aberration.
All images were taken with the same Olympus O-MD E-M1 mk. II at ISO 200 and aperture priority mode starting from f/1.8, f/2.8, f/4.0 and f/5.6.
Camera was mounted on a tripod with in-body image stabilization (IBIS) turned off.
Shutter delay of 2 sec. was set for all shots.
Some thoughts about my lens: As you noticed from the sample images, my lens has a very significant decrease of image quality towards the top-right corner, especially at f/1.8. It becomes less noticable once I stop down to f/4.0 or even f/5.6. But the entire right half of the frame is suffering from this issue. Viewed at normal size, this is not so noticable but above 100% crop it is clearly visible. A little bit disappointing.
With best regards,
Markus
