51–60 of 147 posts
Earlier quoted context omitted.
I must be old -- I vividly remember the Nikon crowd crowing loudly online forums (fredmiranda.com I'm looking at you) about how Canon broke backwards compatibility when they moved from FD to EF. Whereas you could slap an F-mount lens from the 1950s on any Nikon DSLR ever made, no problemo. (Remarkably, this continues to be true!)
Too bad Nikon practically stopped making DSLRs
Am I spoiled by expecting these images to be dynamic? I remember some wonderful posts with graphs you could interact with.
I always wanted to build a controller for Canon Telephoto lenses to use them with c-mount cameras and control the focus from a PC. Might be helpful for that.
Am I spoiled by expecting these images to be dynamic? I remember some wonderful posts with graphs you could interact with.
In case anyone else was looking for it, this article from the same author covers the more algorithm-y question of how a camera body decides to actually use these motors when you press the "focus" button: https://exclusivearchitecture.com/03-technical-articles-DSLR...
I can't find any articles on how a camera body decides what is and isn't a desired subject. I'm guessing there's some amount of machine learning-type stuff involved in that, seeing as how they can detect human (and bird?) faces?
I've always wanted to know how the various autofocus systems worked. This page is incredible. I wish there was another one with the Nikon autofocus systems since that's what I actually have. I still have several lenses with autofocus that don't have an AF motor in it at all, the motor is in the camera body instead there's a tiny screw on the lens mount that transfers the motor rotation to the autofocus parts in the l…
Tolerably modern Nikon lenses have in-lens AF I believe.
Nikon has a complex ecosystem keeping generally the same mount for many decades and general support for it, where others developed a specific autofocus mount when they moved towards those systems.
Such a cool website. In case anyone else was looking for it, this article from the same author covers the more algorithm-y question of how a camera body decides to actually use these motors when you press the "focus" button: https://exclusivearchitecture.com/03-technical-articles-DSLR... I can't find any articles on how a camera body decides what is and isn't a desired subject. I'm guessing there's some amount of mac…
Traditionally, cameras would just focus using the single focus point the photographer has selected, or if they have selected a larger area focusing mode, the camera would typically pick the closest point of a group of points, assuming that that's usually what the photographer is interested in. (Remember that traditional (D)SLRs have a discrete AF sensor with at most a few dozen focusing points to choose from!)
In tracking AF modes (eg. Canon's Servo AF), depending on settings, the camera tries to avoid sudden shifts in focus even if a foreground object momentarily occludes the original target. Tracking AF also has to predict the subject's motion to prevent the focus from lagging behind a fast-moving subject. Higher-end cameras allow configuring the AF behavior in terms of how reactive vs "sticky" it should be when tracking a subject, and how linear the subject's motion is expected to be.
[1] https://www.canon.com.hk/cpx/en/technical/pa_Overview_of_65-...
Earlier quoted context omitted.
Tolerably modern Nikon lenses have in-lens AF I believe.
Newer Nikon lenses have a few motor types but if I'm not mistaken they support old mechanical (body driven) aperture and focus drive as well (the D6 and somewhat recently F6 film camera were still for sale) Nikon has a complex ecosystem keeping generally the same mount for many decades and general support for it, where others developed a specific autofocus mount when they moved towards those systems.