Autofocus is the ability of a camera/lens system to automatically adjust the focus of the lens via a motor attached to the focus group of the lens. Contrast with manual focus.
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124 views
Should Canon 5D mk II autofocus be accurate enough for a f/1.2 lens?
What autofocus accuracy can be expected from an EOS 5DII or EOS 5DIII camera?
I have an EOS 5DII with f/1.2 and f/1.4 lenses. I have a lot of problems getting consistent autofocus with these lenses. ...
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2answers
3k views
What should I do when my Nikon AF-S lens won't auto focus?
I have a Nikon 35mm f/1.8G AF-S DX I bought for my Nikon D5100, it's only a couple months old, never been dropped or anything, and it all of a sudden won't auto focus. Anyone know if this is a simple ...
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6answers
6k views
How can I focus in very low light with my Canon 60D?
I'm using a Canon 60D and would like to focus in low light. I know Canons — in fact, all cameras — can struggle here with auto focus, but I'm talking about light so low that I wouldn't be able to see ...
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2answers
247 views
How to improve the PowerShot G12 shooting speed?
I have been using a Canon PowerShot G12 for about a year, and find it incredibly slow. In full auto-mode, with good lighting conditions, I feel the G12 regularly takes close to 0.5 s between the time ...
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1answer
2k views
Nikon D5100 Focusing Issue
The issue I have had is where the camera tries to focus and cannot focus. It just zooms in and out constantly and no matter what I do it will not focus and fire. The only way I have found around this ...
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2answers
331 views
How important is auto focus and aperture control in a macro setup?
I'm thinking of starting some amateur macro photography, and I'm not sure I want to go with macro lenses, due to their price.
I currently have the following lenses:
Canon EF 50mm f/1.8 II
Canon EF ...
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2answers
986 views
Why is my Canon 500D with kit lens having trouble focusing at higher focal lengths?
I have a Canon 500D with the kit lens. Recently I have observed that its not able to focus at higher zooms but it works at min zoom. To get it to focus, I have to zoom out or recompose and it works.
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2answers
1k views
Why are my pictures blurry/soft?
Ok so I shoot basically one thing....real estate. I am in the market for a new camera so I borrowed a friends canon 50d. I have been using a Rebel xti and been getting good results but I want to ...
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2answers
1k views
How to eliminate auto focus noise in video mode when using NIKON D7000?
You can hear the noise when taking a video w/ NIKON D7000 w/ normal lens. Is there any way to get rid of the noise? Will shotgun mic help?
Thanks in advance!
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1answer
897 views
Why did my 50mm f/1.8 Canon lens deactivate autofocus on Canon EOS 1000D?
I recently lent my 50mm f/1.8 lens to a friend who owns a Canon EOS 1000D. Afetrwards he told me that the camera had deactivated autofocus when he switched back to his kit lens (18-55). Is this ...
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2answers
195 views
Why is my lens focusing sound lounder than before?
I'm new to DSLR camera. I didn't mount a lens properly. The camera still allowed me to take photos, so I didn't notice the error.
After I had been using it for 10 minutes I noticed my error and ...
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2answers
173 views
Do I use the camera or lens switch to change between auto and manual focus?
I own Nikon D7000 with 18-105mm lens. I am bit confused how the auto focus and manual focus switching works, particularly with my gear. The confusing part is both the camera and lens have an A-M ...
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2answers
190 views
Can a drop of a camera+lens cause AF calibration issues on either — or both — the lens and the body? What are the mechanics involved here?
My question is, if you drop a camera, and you think you might have an AF issue, what are the mechanics involved that might cause a mis-calibration? I can imagine that the lens has movable parts -- ...
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3answers
420 views
Where is Canon 1100D autofocussing in low light low contrast conditions?
It's obviously my fault for living in the UK and expecting to want to enjoy my bird photography in grey January afternoons, but, I would appreciate some opinions on the following.
I took 150 shots ...
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1answer
205 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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2answers
321 views
Is there a secret way to make the Fujifilm X-Pro 1's autofocus point selection faster?
I think the answer to this is "no", but it may actually be available and I'm just not figuring out how to toggle the setting.
The X-Pro 1 has a wealth of AF points — 49 in EVF mode and 25 in OVF ...
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1answer
275 views
Why is my Canon Powershot A1100 focusing only on the bottom part of scenes?
I've been using a Canon PowerShot A1100 IS camera for the past year and it had been working just fine until I decided to change its settings. After I had serious trouble with it, I reset the settings ...
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1answer
64 views
Does using multiple batteries (via grip) improve AF speed?
I want to say I read somewhere that, particularly with heavier lenses (such as the 70-200 F/2.8), having two batteries in the portrait grip would provide extra juice to the AF motor and help it ...
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1answer
175 views
How do I make the focus point indicators stay long enough to select on the Canon 60D?
I have just switched from the Canon 500D to a 60D. Most of my work is property based, and this is therefore 90% internal flash shots where I often wish to pick out a particular spot for best focus.
...
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2answers
88 views
How can I be sure a lens will autofocus on my Nikon D5000? [duplicate]
Possible Duplicate:
What type of lens will auto-focus on Nikon bodies without a focus motor?
I have a Nikon D5000. For Nikon Lenses I know that I have to buy ones that are AF-S. Easy ...
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1answer
647 views
How can I make phase-detection AF more accurate with a Canon 650d and 50mm/1.8?
This is what I get pretty much every time when shooting in Live View mode using the Canon 50 1.8:
This is what I get when I'm lucky when focusing through the viewfinder:
This is what I get when ...
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1answer
1k views
Is back-button autofocus possible on the Nikon D7000?
A while back I asked about the purpose of back-button autofocus and got several answers. The Nikon D7000 lacks the "AF ON" button that's present in some higher-end cameras.
Is it possible to use ...
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1answer
216 views
Do AF-S lenses work with bodies with in-built motors?
I have D-5000 body (without AF motor in the body) and two AF-S lenses.
If I upgrade my body to more expensive body one with built-in AF motors, will AF-S lenses work (do autofocus) with new body ?
...
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3answers
97 views
Is focus hunting “normal behavior” for the Sony SEL18200SE?
I recently bought an NEX-6, the 24mm F1.8 (SEL24F18Z) lens, and the black 18-200mm F3.5-6.3 (SEL18200LE) lens. I love the 24mm lens, but I'm having a what I believe one would call a "focus hunting" ...
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1answer
162 views
Why is my ISO so high in auto mode?
New user of a Canon 7D - less than 50 shots taken.
Last night, I needed to take a quick picture of something that was on my cell phone with my Canon 7D
I propped the phone up against a white pillow ...
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2answers
314 views
EOS 60D manual focus/exposure selection only after half press
The 60D only lets you select exposure compensation (with the round wheel on the camera back) and AF point (using the 8-way button or the AF point selection button, depending on your settings) only ...
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1answer
404 views
Canon T2i doesn't seem to take crisp photos
I've been using my Canon T2i to do portraits for the last year now, and usually have really good luck with it. Most of my shots are up close, and turn out beautiful. However, it seems like when I ...
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1answer
293 views
Is Sigma 50-500mm EX DG HSM lens compatible with a Nikon D90 body?
Aloha,
Can anyone tell me if the Sigma 50-500mm EX DG HSM lens (non OS model) is compatible with a Nikon D90 body? I recently purchased this lens on eBay but it seems that the lens will not ...
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1answer
89 views
What settings affect how the focus points are displayed for my 7D?
My Canon 7d is about 2 months old. I used it for a shoot in DC, and it just isn't behaving as expected. When I try to focus, I get little black boxes in the focus frame. They used to be black, with ...
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2answers
117 views
Nikon D5100 intermittent focusing problem
I'm having this intermittent problem that the camera does not want to focus in auto-focus. When this happens I try to switch to manual on the lens, (both 300mm, and 55mm) but the toggle button will ...
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1answer
278 views
autofocus and maximum aperture of 60D [duplicate]
Possible Duplicate:
What are the aperture limits for autofocus on Canon DSLR cameras?
It is mentioned on page 79 of the EOS 60D manual that the center point AF is twice as accurate at ...
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1answer
1k views
How do I fix a lens with a problem returning to autofocus mode?
I bought a Canon EF 28-105mm f/3.5-4.5 II USM lens for my Canon 350D. It works mostly fine, except after switching from AF to MF, I can't return to AF mode.
After I switch MF->AF, the lens doesn't ...
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1answer
316 views
Problem with TTL autofocus on Canon 450d - is there a way to adjust?
I have Canon EOS 450D, and it seems, that camera have problem with autofocusing, when i'm looking through optical viewfinder. If I switch camera to liveview - autofocus works correctly, but slow.
The ...
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4answers
1k views
Why can't I take a photo in dark with auto focus, manual mode?
I'm dorking around with a Nikon D80 and I am a total beginner. I am trying to shoot some light trails but the darn thing doesn't even take a picture. I am in manual mode with the bulb setting. For ...
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2answers
239 views
Is there a way to use phase detection AF with live view on a Canon EOS camera?
On any of the EOS xx(x)D model that has the live view function, can the camera make focus using the AF collimators (instead of using contrast detection), as it's possible on the old Nikon D300 ?
If ...
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4answers
1k views
What low-cost ultra-wide angle DX lens will autofocus on my Nikon D5000?
I need a wide angle lens for low-light/club photography with my Nikon D5000. I was going to pick up this one, but then I realized that it won't autofocus on my body. What is the closest equivalent ...
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4answers
339 views
Autofocus performance of different brands at night
Are there huge differences in the ability to focus in low light between different brands and models?
I have a Pentax Kx with a Sigma 30mm 1.4. My problem is, that the camera's autofocus does not work ...
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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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3answers
169 views
What does infinity focus mean and when should I use it?
All my lens have focus ring where at the end there's an infinity symbol. What does that mean? If I'm taking landscape shot and what everything from near to far to be in focus, do I use infinity? Or am ...
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1answer
224 views
What happens when a Sony SLT camera is operated with mirror up?
What happens if you attempt to operate a Sony SLT (pellicle mirror) camera with the mirror up? Does the camera detect this condition? Will the camera shoot? What happens to autofocus--can the ...
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3answers
163 views
Why does my autofocus fail in windy conditions?
When I say windy, I mean inside 100+mph prop-wash, shooting from an open cockpit aircraft. The camera is an Olympus C-765 UltraZoom, which features a retracting zoom lens. It may be that manually ...
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2answers
395 views
Why are images with my Nikon D7000 and 70-200mm lens soft?
I'm having trouble getting sharp pictures with my D7000. I've tried it with a 70-200 and 18-70 and produce the same results. I've tried AF Fine Tune with one of those focus charts, but the value of 0 ...
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1answer
137 views
The future of AutoFocus [closed]
I bought a Nikon D5000. Back then I didn't know anything about photography, but it sounded like a really good intro camera. And so far it has been. I don't mind the DX format, and have invested in ...
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1answer
181 views
Which of the following lenses do fit on a Nikon D 3100
I've been given the following lenses from my neighbour; which ones will fit a Nikon D3100?
Sigma 28-200 mm F F3,8 - 5,6
Nikon Af 70-210mm F/4,0-5,6
Nikon Af 28-85mm F/3,5-4.5
Nikon 50 mm F 1.4
Nikon ...
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1answer
344 views
Is continuous autofocus in video a software or hardware function?
My camera (Sony alpha A580) does not natively support video autofocusing. When I was buying camera, I didn't think that was such important feature for me.
Now I want my camera to be able to autofocus ...
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2answers
343 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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2answers
183 views
What settings do I need for shooting a candid against the sky?
I have Canon 1000D. Most of the times I use canon 50MM F1.8.
I use evaluative metering and single point (center) auto focus.
What setting do I need to change to have metering of sky (say red of ...
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2answers
111 views
What might be causing my AF system to misfocus?
I have a Canon Rebel T1i with the default Canon lens.
When I shoot with it, I use Auto Focus and get the red dot indicators in the viewfinder as expected.
But even though it looks like the camera is ...
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1answer
82 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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1answer
396 views
How to find out perfect autofocus adjustment value? [duplicate]
Possible Duplicate:
What is the best way to micro-adjust a lens?
I have D7000 for some time and all of my nikon lenses were working fine. But I have bought Tamron 28-75 recently and it's ...
