The focus-motor tag has no wiki summary.
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1answer
88 views
Misfunction of Canon EF 50mm f/1.8 on manual focus?
I have a Canon T3i (600d) and two lenses: EF-S 18-135mm and EF 50mm f/1.8.
While working with manual focus, I can shoot out of focus (on purpose) with the 18-135 (as expected).
But with the EF 50mm, ...
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2answers
330 views
What kind of AF-motor does a Nikon D7000 body have?
I am a novice in the SLR photography world and am going to buy my first camera. I intend to take occasional videos. I guess if the AF-motor is screw and gear type, the clicking noise will ruin the ...
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1answer
79 views
Can I use a Cosina AF 28-300mm f/4-6.3 with a Nikon D5100 if I focus manually?
The Cosina AF 28-300mm is an autofocus zoom for Nikon F-mount (body must have AF motor).
Can I still use it with the D5100, provide that I will have to manual focus?
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2answers
166 views
Can I control if the in-body AF motor is used instead of the lens AF motor on my Nikon?
I have Nikon D7000 with 18-105mm. I know that the camera body has the AF motor and the lens itself has the AF motor too. I was wondering can I control which AF motor should be used while autofocusing. ...
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1answer
204 views
Why does my D70s no longer focus my Nikkor 70-300, but still focuses the 18-70?
At first I thought my lens was dead but after switching to my other D70s it worked fine.
So, here's the issue:
One of my D70s bodies can no longer auto-focus my Nikkor 70-300 lens. Switch to a 18-70 ...
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3answers
362 views
SLR camera with inbody motor verse AF- S lens [duplicate]
Possible Duplicate:
How do camera body motors compare to in-lens motors for focusing?
Can I save money on lenses by buying a Nikon camera with an in-body autofocus motor?
I would like to ...
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2answers
296 views
Why can't AF-S lens (with broken auto-focus) work with bodies that have build-in motor?
Background: I have a Nikkor 70-300 AF-S G. Somehow, the VR and AF systems stopped working.. It was working perfectly fine, then for 2-3 months it stayed inside the bag, in a wardrobe, without even ...
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5answers
270 views
Do all cameras with autofocus need motors?
Do all autofocus cameras need motors to drive the lens? I would have thought today's modern electronics rendered motors obsolete.
7
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1answer
581 views
What technical reasons prevent Canon's new hybrid AF working with non-STM lenses?
Canon's new Rebel T4i (a.k.a. EOS 650D) has a new "hybrid AF" mode, which allows continuous AF during video, but only when used with one of the new STM lenses.
I've seen chatter on the web forums ...
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2answers
221 views
What would cause a Pentax SDM lens to stop autofocusing, and what can I do?
I've read many reports that the SDM autofocus motor in some Pentax lenses may stop working after several months or years of use. Why does this happen, and is there anything I can do to prevent ...
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1answer
261 views
How do ultrasonic motors allow continuous manual focus?
I understand the basic pros and cons of ultrasonic lens motors — called USM by Canon, SDM by Pentax, or SWM by Nikon. One of the chief benefits is that they allow "always on" manual focusing — you ...
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1answer
183 views
Can I save money on lenses by buying a Nikon camera with an in-body autofocus motor?
I have dilemma what camera is better Nikon D5100 or D90. The first one is newer but the second one has lens servo ("screwdriver") motor. My question is: can I save some money overall with the more ...
4
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1answer
357 views
What is an auto-focus motor?
I recently bought a Canon 550D, and I read it has an auto-focus motor, which not all cameras possess. I'd like to know what it is, and what I can do to keep it running smoothly; AFAIK the manual ...
