This is the ninth post in a series of Nikon D850 tests. The series starts here. In this post, I reported on the autofocus accuracy of the Nikon D850 using both contrast-detection (CDAF) and phase detection (PDAF). As Horshack pointed out, in AF-S mode with PDAF, the camera does not refocus if it likes the phase… [Read More]

This is the eighth post in a series of Nikon D850 tests. The series starts here. At least one person has complained that their Nikon D850s have the wrong flange focal distance, so that the lenses think they are a different distance from the sensor than they really are. This can be a serious problem for… [Read More]

This is the seventh post in a series of Nikon D850 tests. The series starts here. Actually, this isn’t really a D850 test. It’s a test of a Nikon 105 mm f/1.4 lens that happens to be mounted to a D850. The performance of the combination is what I’m testing. We saw some anomalies in the D850… [Read More]

This is the sixth post in a series of Nikon D850 tests. The series starts here. I decided to do my downhill-with-a-tailwind test for autofocusing accuracy on the D850 with the Nikon 105 mm f/1.4 lens. This test uses a static flat, easy-to-focus-on target and bright light (in this case, f/1.4 at 1/800 seconds at ISO… [Read More]

This is the fifth post in a series of Nikon D850 tests. The series starts here. I made a series of dark-field exposures at ISO 1000 at all the timed shutter speeds that the D850 supports, with LENR off. I measured the rms read noise in counts (data numbers, if you prefer) in a 400×400 pixel… [Read More]