Yesterday  I reported on the performance of this Schneider enlarging lens on a Cambo Actus-attached GFX 50R wide open. In the corners, the results were good but not great, so I repeated the test with the lens stopped down to f/5.6. Test protocol: Manual exposure, the same for all images 12 meters target distance ISO… [Read More]

The Schneider 90/4.5 Apo-Componon HM is an enlarging lens that I happen to have lying around from my film days. I remembered it as a great enlarging lens. I wondered how it would perform in a completely different role: as a camera lens. This is asking the lens to perform well outside of its comfort… [Read More]

Earlier, I reported on the great news that the Sony 135 STF (apodized) A-mount lens covers the GFX sensor with zero vignetting. Yesterday I examined sharpness, both on and off axis, using a slanted edge and a Siemens Star for a target, and found the lens quite sharp on axis, and soft in the corners…. [Read More]

Earlier, I reported on the great news that the Sony 135 STF (apodized) A-mount lens covers the GFX sensor with zero vignetting. Yesterday I examined sharpness, both on and off axis, using a slanted edge and a Siemens Star for a target, and found the lens quite sharp on axis, and soft in the corners…. [Read More]

I’ve already reported on the great news that the Sony 135 STF (apodized) A-mount lens covers the GFX sensor with zero vignetting. Now I’m going to look at sharpness, both on and off axis, using a slanted edge and a Siemens Star for a target. Here’s the scene: And here’s just the target area, as… [Read More]