autofocus

  1. S

    Autofocus not working on Tamron 28-300mm VC PZD lens (for Canon)

    Hi! I'm suddenly experiencing an auto-focusing issue with my Tamron 28-300mm Pzd VC f3.5-5.6 lens for full frame sensor cameras (Canon mount). I've never encountered this before with this or any other lens. And there was no gradual deterioration: from one day to the next, autofocus just started...
  2. P

    NIKKOR AF-S Micro 40mm. Autofocus problem

    The lens itself is very good. I use it with the Nikon D3100 to do a lot of timelapse of flowers opening. That's from bud to fully open flower. A single session can take several hours so everything gets bolted down solid in a quiet room with no disturbance. Not much latitude for focal-depth so...
  3. L

    Canon 80D continuous AF problems

    Hi! The continuous autofocus (eg. AI Servo in Canon-ese) works fine for my 80D when shooting in live mode. . . which is something I literally never do, always opting to use the viewfinder. I use back button focus, but once I lock focus (single-point) on a subject while using my viewfinder, it...
  4. A

    Focus problem with the Sigma 24mm 1.4 Art

    Hey, ich have the Canon T6i/750D with the Sigma 24mm 1.4 Art lens. I also bought the Sigma USB Dock and tried to calibrate it. I haven't had problems with the first three calibratable distances (0.25, 0.35, 0.6) but when I shoot at distances which are further away than those like 2, 5, 10, 20...
  5. Meisshi

    I have Canon T2i. I think I want Sony A55. Help me a little bit?

    Hi friends! My first post. I wanted to find a place where many knowledgeable people could weigh in. Here's my "story". I am by no means a pro or know as much as actual photographers, but I wouldn't say I'm a complete beginner either. Four years ago I bought Canon Rebel T2i, which is pretty...
  6. B

    Canon EOS M/50mm 1.8

    I have the Canon EOS M with the 50mm 1.8 lens. When I press the shutter button half way to autofocus, the shutter closes but doesn't reopen. When I press the button again, it opens. Everything works fine on manual focus and the autofocus works with my other lenses. Any help would be greatly...
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