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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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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2answers
252 views
Enable Auto focus after timer on Nikon D800?
I'll start with an apology if everyone knows this but me.
I bought a Nikon D800 about a month ago (adore), but the wireless remote I used for the D7000 is not compatible. No worries, I'll just ...
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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 ...
3
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3answers
401 views
Why are there no autofocus tilt-shift lenses? or, why do tilt-shift movements appear to be incompatible with phase-detection autofocus?
I have never seen or heard of an autofocus tilt-shift (perspective control) lens. It seems like perspective control movements prevent phase-detection autofocus from working correctly; for example ...
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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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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
3k views
Are Nikon lens double the cost of Canon auto-focus lens?
Are Nikon lenses double the cost of canon Camera? Point in case, below.
I am an amateur photographer and my usual requirements are:
Portraits with nice Bokeh
Macro (flowers, insects etc.)
Day ...
3
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1answer
98 views
What factors influence whether a lens and camera combination front or back focus?
I know that sometimes a lens/body combo needs to be micro-adjusted to attain ideal focusing behavior, and that this is usually because of sample variation, but which parts of the lens and/or body are ...
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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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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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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
146 views
Skin tones become yellower/ oranger when flash is on
When I take pictures of people, the yellow and red tones seem to be enhanced and the result is a more jaundiced complexion in best case scenario and orange and a bit shiny if their skin is a bit oily. ...
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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.
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2answers
173 views
lens care: compressing lens without full-time manual focus when camera is off?
The lens manuals for my lenses without "full-time manual focusing" warn not to use the focusing ring when it's in Auto-Focus mode. I assume that even applies when the camera is off, but am I being ...
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2answers
217 views
Do point and shoot cameras have a metering sensor?
I have a Pentax point and shot camera and I tried to convert it to Infrared. I was successful to remove the front IR filter from CCD and then I had a 760 nm IR filter to kick start with the infrared ...
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2answers
809 views
Why can't my camera autofocus in low light with a small aperture?
My question is not about "how to focus in the low light" or "how to focus a camera". The question is why the camera is unable to auto-focus in low light with high f numbers?
In these conditions, I ...
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2answers
272 views
How To Fix Badly Functioning Shutter Release-Button?
I have a compact Pentax OptionM10 which I bought in 2006 and sometimes shutter-release button works only when pressing it on edge and under specific angle, but mostly as I apply little pressure which ...
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2answers
563 views
All my photos were blurry
I recently did a shoot of a baby and my 6 year old son, and I got some fantastic shots that were super sharp. I then did another shoot of a 6 year old and toddler and every single photo was slightly ...
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0answers
40 views
Budget Nikon setup - future problems due to AF-S vs AF? [duplicate]
Possible Duplicate:
Is the lack of AF Motor on the Nikon D5100 an important factor?
I am just starting up as an amateur photographer to venture into DSLRs. Being on a tight budget, I am ...
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1answer
223 views
I almost cannot switch to manual focus on my Canon 17-40 f/4 L lens
Usually troubles with autofocus are related to a non working AF. I've got the opposite issue: AF is working too well. Actually, it is ALWAYS working, and I cannot turn it of.
Even when I switch to ...
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2answers
660 views
How can I determine if my Sigma 10-20mm lens copy is appropriately sharp and focusing right?
I just purchased a Sigma 10-20mm lens (Canon mount) and based on the reviews I was aware that many people receive copies of the lens that are soft or don't focus properly. I purchased from B&H, so ...
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1answer
317 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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1answer
582 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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3answers
439 views
Is there a Canon equivalent for Nikon's AF-ON focus system?
I'm very new to photography, and have been reading a lot about concepts and techniques. Yesterday, my brother gave my kid a gift of a professional photography session. I saw the photographer had Nikon ...
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3answers
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What does STM mean on a Canon lens?
The upcoming Canon 40mm f/2.8 has a designation of STM on the lens. What does this mean? What are the advantages of having it and does it replace an older technology?
We have a terminology thread ...
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4answers
1k views
How do you use the different autofocus points on your DSLR?
My Nikon D300 has quite a few autofocus points. There's a button I can operate with my thumb to change the autofocus point but I find that quite difficult to use. So I almost exclusively use the ...
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2answers
827 views
Shutter half-press to focus possible in Live View mode on EOS 50D?
When not in Live View mode and when the lens is set to AF mode, when I press the shutter button half way on my Canon EOS 50D it causes the camera to auto-focus, as expected. In Live View mode, I have ...
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2answers
734 views
Is it really better to not half-press to focus with the Fujifilm X-Pro 1?
Fujifilm's new camera uses contrast-detect autofocus, and the current Internet hand-wringing is over whether this is a horrible critical flaw or not. As often happens in such discussion, a bit of ...
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1answer
178 views
What autofocus zone selection mode should I use for action/event shooting?
I have a Canon 7D, and typically shoot everything I do in its single-point autofocus zone select mode, because I usually want fine control over exactly what the camera is focusing on and I often find ...
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1answer
249 views
How can a teleconverter allow manual focus lenses to autofocus?
I've found that some discontinued teleconverters, such as the Pentax F 1.7x AF Adapter and Nikon TC16A, enable autofocus with manual focus lenses. How is this possible? Does this system have any ...
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2answers
1k views
How do I keep my Nikon D5100 from attempting to autofocus with every shutter press?
I have a Nikon D5100 and the auto focus works fairly well most of the time. But there are times when I have a subject in focus and want to fire off multiple shots fairly quickly. I do not need to ...
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1answer
238 views
Why does the Fujifilm X-Pro 1 have fewer AF points in optical viewfinder mode?
From the Fujifilm X-Pro 1 manual:
When AREA is selected for AF MODE in the shooting menu and S is selected for focus mode, the electronic viewfinder
and LCD monitor offer a choice of 49 focus ...
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3answers
1k views
Are there cheap or DIY focus assist solutions for the Canon 5D?
I want a better autofocus system for low light. Low light auto focus is my biggest bane.
I use a 5D so the options are AF on a flash like the 430 or 580. I happen to use the Pocket Wizard TT1 so I ...
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2answers
3k views
Why does Canon and Nikon limit or disable autofocus beyond certain f-numbers?
One thing that I've noticed with Canon DSLR camera is they will disable or limit autofocus when the lens is below certain aperture values, which are specified in my answer to What are the aperture ...
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4answers
505 views
How important is auto-focus with a 50mm lens?
I have a Nikon D5000. I have wanted the 50mm AF-S as a portrait lenses for a while, but it was sold out forever. I finally broke down and got the older 50mm AF. Good lens, but no auto-focus on my ...
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1answer
244 views
When is it really necessary to use AF assist light?
I find the AF assist light to be distracting at times when I'm trying to take a candid shot without disturbing the human subjects or taking pictures of pets (they hate getting the AF light in their ...
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3answers
558 views
When a camera auto-focuses, is the current focus distance reported from the lens to the camera?
The question says it all -- does the camera "know" how far the subject is from the lens, i.e. what is the current exact focus distance set at the lens?
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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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1answer
4k views
Can I fine tune the autofocus on my Canon 60D to be more accurate?
I noticed that some of my lenses auto-focus more accurately then others. (Assume perfect light conditions and fast shutter speed) Zooming-in on say the center focus point (if only the center focus ...
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3answers
1k views
Which lenses typically don't focus properly on the Canon 60D?
I currently have the 18-200mm kit lens for my canon 60D. I am thinking of getting the 10-22mm wide angle lens as a second lens. So far with my kit lens I havent experienced any focusing problems or ...
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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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3answers
2k views
What do the AF-A, AF-C, and AF-S autofocus settings mean?
My camera has these settings for autofocus, and I don't know what they mean. I suspect "A" is "Auto", and "C" is "continuous", but I have no idea what "S" is.
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4answers
567 views
Will I regret buying an older lens that doesn't autofocus or have image stabilization with my Nikon D5000?
I am planning to buy a Nikon Normal AF Nikkor 50mm f/1.8D Autofocus Lens.
It doesn't autofocus on the D5000 but for the price, I think it's a good choice of lens for portrait.
What do you think? ...
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3answers
1k views
Is the Canon 600D Al servo autofocus up to the task of following moving subjects?
Has anyone tried shooting fast moving subjects (birds, cars, running animals) with Canon EOS 600D using Al servo autofocus? I am thinking of getting this DSLR but the internet reviews are a bit ...
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2answers
248 views
How to verify that Nikon SB-28DX AF-assist is working?
I have a Nikon SB-28DX which I am using with an F5. I understand from the instructions how to turn the AF-assist illuminator off. But, how do I verify that it's working? Does it still work with ...
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2answers
21k views
What's the difference between cross-type autofocus points and regular ones?
What's the difference between different autofocus point types (cross vs point and such)? Cross points seem to be a "feature" — why?
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1answer
529 views
What is EOS iTR AF?
I have read references to this feature on some Canon DSLR cameras and am wondering what benefits or uses it has.
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4answers
5k views
How do camera body motors compare to in-lens motors for focusing?
What is the difference between using a motor on the camera body and the motor built into lenses?
Aside from how both compare in terms of speed, what differences would I notice if I use a body with a ...
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1answer
435 views
Auto-focusing problem on a Canon 500D with a EF-S 18-55mm 1:3.5-5.6 IS(standard kit lens)
I'm having problems with the lens. I've tried auto-focusing with my other lenses, and it works fine. It can only auto-focus one way, i.e. the focusing ring is still able to move, but only able to turn ...
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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 ...
