Laowa 7.5mm F2.0 lens test
Olympus EM1 II with Laowa 7.5mm
- I just received the Laowa 7.5mm F2.0 lens (ordered
it directly from Laowa via web-preorder).
- I did a small test to check the lens sharpness at different
apertures. Initially I took pictures of a newspaper page at different
- The problem was that to cover the complete frame with the
newspaper page I had to place the camera at a distance of 24cm from the
newspaper page. But like this, at F2 the depth of field is so shallow
that the image regions out of the centre are blurred due to lack of
depth of field.
- So I did a different test, taking shots of the view from
the window of a building. The closest parts of the scene were about 6-7
metres from the camera (the first lamppost from the left and the tree
in tht bottom centre). Even at F2, all parts of the image would
be in focus (with the bottom right better in focus than the bottom left
at the largest aperture, because the bottom left was closer to the
camera). The camera was on a tripod:
- Olympus E-M1 Mark II (20 MP) with Laowa 7.5mm F2.0 lens
mounted on a
- The lens was manually focused in the centre of the image.
- I triggered the camera with a smartphone and the Oly app to
avoid camera shake.
- All images are out of camera JPEGs (auto WE, natural mode,
ISO 200). No processing applied.
- Not knowing what lens was being used, the camera didn't
apply any in-camera corrections (geometric distortion, vignetting,
- That means that when processing the RAW image, it should
be possible to correct distortions, vignetting and aberrations.
Bottom corner, left
Bottom corner, right
High resolution sample images
- At F2 the centre has almost the maximum sharpness.
Sharpness in the centre improves at bit until F4-F5.6, but F2 is
already sharp in the centre.
- The corners are sharp at F4 and sharpest at F5.6.
- In the unprocessed image there is visible vignetting until
- Chromatic aberrations are visible, mostly in the corners,
at all apertures. These are easy to remove this when processing the RAW
Left side: out of camera JPEG; right side: processed RAW image after
chromatic aberration removal; 200% view; image taken at F4