Moving along the chart, around 50% of all DSLRs would benefit from an adjustment of up to 7 units! At that sort of adjustment, that’s a significant visual change improvement and just shows that it really is pretty much essential to calibrate your DSLR to get the best from your lenses. We can again see that around 97% of DSLRs require an adjustment of at least 1 unit. The chart below shows the percentage of all Nikon DSLR cameras and lenses tested with FoCal that require certain AF Fine-tune values (ignoring direction), across all tested lenses: Part 2: On-Sensor Phase Detect AutofocusĪlthough this post is about mirrorless calibration, I wanted to briefly touch on DSLRs, with their old-school technology of an SLR camera, using a separate phase-detect autofocus sensor.Part 1: You SHOULD Calibrate your Mirrorless Autofocus!.This post is part of a series looking at on-sensor phase-detect autofocus, the whole autofocus system, and why mirrorless autofocus might still need some calibration.
I’ve used information from the Camera Database at FoC a l IQ (April 2023 data) for this information.
I’ll link back to the previous posts at various places – there’s a lot of information in them.įirst, we’ll take a look at some empirical evidence gathered from FoCal user results uploads which show the sort of focus adjustment required for cameras.
This is the culmination of a series of posts about how the whole autofocus system works and what issues might still lead to a requirement to calibrate lenses even though the autofocus measurements are now obtained from the same sensor as the image is captured from.
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