Blog Archives
Mirrorless AF Calibration – Part 6: The Evidence
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. I’ll link back to the previous posts at various …
Mirrorless AF Calibration – Part 5: The Autofocus Processor
In previous posts, I’ve covered issues that might affect the AF Sensor and the Lens. The last part of the Autofocus System is the AF Processor – the brains behind the whole operation. When I talk about the AF Processor, I’m talking about a conceptual block of functionality – It may be a dedicated chip …
Mirrorless AF Calibration – Part 4: The Lens
The lens is a huge and critical part of the autofocus system, after all, it actually does the focusing. Far from being a single lump of glass, they’re actually intricate and complex systems of exotic crystals, metal and electronics which are designed to work in harmony to focus light of any visible colour to a …
Mirrorless AF Calibration – Part 3: On-Sensor Phase-Detect Issues
In part 2, we covered the operation of the AF sensor, so now it’s time to take a look at some potential problems that could occur at the sensor which may affect the sharpness of our final images. This post will specifically look at issues relating to the phase-detection process occurring on the image sensor, …
Mirrorless AF Calibration – Part 2: On-Sensor Phase Detect Autofocus
Overview Autofocus (AF) technology has revolutionised the world of photography, allowing photographers to capture sharp images quickly and consistently. One of the most popular and widely used autofocus technologies is Phase Detect Autofocus (PDAF). In this blog post, I’ll delve into the inner workings of PDAF so we have a solid foundation for understanding why …
Mirrorless AF Calibration – Part 1: You SHOULD Calibrate your Mirrorless Autofocus!
“Mirrorless cameras don’t need calibrating.” You hear that a lot, but is it true? At Reikan, we’ve been gathering autofocus calibration results for almost 10 years now from users of our FoCal software, which includes data from users of Nikon Z-series mirrorless cameras… and it suggests that you should calibrate your mirrorless camera. I wanted …