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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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1answer
21 views

How do I achieve autofocus while zoomed in on a face, if surrounding elements hold more contrast?

I recently bought a new camera, a Panasonic FZ1000, and noticed on more than one occasion when I was photographing my wife in a posed situation, and I choose to zoom in a little for the shot, the ...
0
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0answers
68 views

Why does my photo become blurry in manual focus?

When I'm shooting in auto-focus mode, the pictures that I got are crystal clear but when I'm using it in manual-focus mode with the same conditions, the photos become blurry. I also have a question ...
2
votes
2answers
124 views

For those that can afford fancy teleprimes is it preferred to use AF or MF for birds?

Context I'll be using a Nikon 300mm/f4 on my Sony a6000 and seeing what birds I can get with it. The Sony 55-210mm is what I've been using but it lacks the reach and native teleconverters. ...
4
votes
1answer
217 views

How do I auto-focus an EOS M when stopped down to kill the ambient?

I'm trying to do take some portraits with two off-camera strobes. I want a dark background, so I'm using a high f-stop and high ISO to kill the ambient, relying on the strobes to light the model. But ...
-1
votes
2answers
92 views

Is it possible to use more than one focus point on the Nikon D3200? [closed]

When focussing with the D3200, is it possible to select more than one focus point? If so, how?
2
votes
2answers
58 views

Fine tuning a lens focus [duplicate]

I just got a 35mm f/1.4 lens and wanted to see if it has any focus issues to be fixed. So I got this kit and not sure what exactly I should have done but I focused on the middle of that bar code like ...
0
votes
0answers
37 views

Why can't my Canon T5/1200D focus on my subject? [duplicate]

I try to take a basic picture of the baby laying on the couch, the focus goes in and out over and over won't snap the picture, when/if it does its blurry? Can't get a simple quick pic of the baby?
0
votes
1answer
53 views

Does the EF-S 18-55 STM make noise when it autofocuses? [closed]

I'm planning on buying a Canon 70D with the kit lens, an 18-55mm IS STM lens, to film tutorial-style videos (and for other purposes as well). I know that sometimes you can hear cameras autofocusing in ...
2
votes
2answers
137 views

Why doesn't autofocus work after using manual focus for a while on my Nikon DSLR?

I bought a Nikon D3200 DSLR with 18-55 and 70-200mm lens. I was taking photos for week in autofocus mode, where I have to press shutter button halfway to focus. And then I switched to manual, where I ...
3
votes
3answers
158 views

What is AF-L needed for? [duplicate]

After quite a lot of reading even, I am not being able to grasp the rationale behind the AF-L part of AE-L/AF-L button on Nikon D5300. If the camera is set to AF-C, then the concept of locking focus ...
1
vote
3answers
113 views

Is it normal for phase-detect autofocus to be inaccurate with a Canon EOS 750D and EF-S 18-55mm lens?

I'm using an EOS 750D with an EF-S 18-55mm IS STM lens. I often have trouble getting accurate focus using the viewfinder autofocus. Live view autofocus works fine. Here are two crops of the same ...
0
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2answers
51 views

Autofocusing multi v single point at a party [duplicate]

Context I've shot at a party at night recently. I've used mainly multi point (continuous) tracking as it makes more sense, as random events may come and go. Question My friend suggests that I ...
0
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3answers
131 views

Is autofocus important for ultra wide angle lenses?

I want to know if autofocus is important for ultra wide angle lenses, for casual users. I mean, users like my mom. I don't mind about manual focusing, but I suspect that wide angle lenses will focus ...
1
vote
1answer
123 views

Why doesn't my “Nikkor AF” lens autofocus on my Nikon D3300?

I recently got a new lens for my Nikon D3300. I now have 3 lenses; the other two that I have came with the camera and work great but when I put my new lens on, it will only manually focus. If I go to ...
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votes
1answer
45 views

Autofocus with canon EOS 1200d [duplicate]

Can my EOS 1200d autofocus with1.4x canon teleconverter and canon 300 mm f4 lens. What will be my maximum aperture using both of these.
0
votes
1answer
49 views

Good Photographs with Moto G2 Camera [closed]

I have got a MOTO G2 Mobile with 8MP front camera, usually i get best shot from my phone but is there any way so that i can capture best pictures with a mobile camera everytime?
1
vote
1answer
82 views

Using one focus point in autofocus mode - interval timer shooting - NIkon d7000

I was working on some selfportraits using interval timer shooting and I found that the camera focuses one of 3-4 shots on the subject. Obviously, it recognizes the face but most of the times, it has ...
2
votes
2answers
78 views

How can I turn off auto focus when using the remote with my Nikon D7000?

I have a remote with my D7000 and it's hugely frustrating that it auto focuses when using the remote. The whole reason I want it is for speed and to not move the tripod. I have looked through the ...
6
votes
3answers
198 views

Why isn't infrared AF assist beam the default when available (instead of irritating strobing)?

I have an entry level Canon camera with a built-in flash. When I try to photograph people at night the camera fires some pre-flashes to help with focus. While I do understand its necessity, some of ...
3
votes
2answers
93 views

Shallow DOF: continuous or single AF mode?

When I take a portrait with settings which result in a DOF shallow enough that the subjects' movements risk missing focus on the eyes, should I use continuous AF mode - is the continuous AF fast ...
0
votes
1answer
66 views

Canon 1100D auto focus issues

I'm having a rather odd issue with my Canon 1100D, whenever looking through the viewfinder to take pictures the auto focus will not work. I am unable to release the shutter, the same goes for manual ...
0
votes
1answer
93 views

Nikon D750 + Nikkor 18-35mm - How to enable full autofocus?

I recently got this powerful duet (before I had Pentax K-r), sadly I can call myself a total beginner even I used dslr previously... as I used it with auto mode. However I am learning slowly now, but ...
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0answers
37 views

What is the 4D autofocus and how is it different from the continuous servo in Nikon?

I just saw a new auto focus term 4D focus introduced by Sony in one of their cameras. How is it different from the continuous servo in Nikon ? Are both the same ? or totally different ? And what ...
0
votes
1answer
35 views

How can I make the 580EX II “probe flash” on a 7D MkII?

I've bought the 580 EX flash used, it's my first external flash. And I'm playing around with it to get some experience. One of the problems I've noticed in very dark environments is that the autofocus ...
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0answers
22 views

Why does AF mode go back and forth and not find focus while MF works perfectly? [duplicate]

It's the same with the Olympus 14-42 lens and with the Panasonic 45-150 - my Olympus E-PL3 rarely works correctly in AF mode; 90% of the time the focus goes back and forth before being secured in a ...
2
votes
4answers
728 views

Simply bad focus or too big aperture?

I have made a mistake with this image: ISO 400 | 1/1700s | f/2 I used manual Aperture mode and set it to F/2 (now I believe this is too much). Kids were one meter away. It was light cloudy ...
3
votes
1answer
77 views

What is “hybrid AF”, and how does it compare to other autofocus technologies?

I've heard of some new cameras — particularly mirrorless cameras — with a feature called "hybrid autofocus". What does this mean, and how does it relate to the traditional approaches of contrast and ...
0
votes
3answers
109 views

Does having an autofocus motor in body vs lens affect image stabilization or image quality? [duplicate]

In terms of image quality and image stabilization, what difference does it make to have an autofocus motor in-body vs.in-lenses ? The question How do camera body motors compare to in-lens motors for ...
0
votes
1answer
60 views

Does the Sigma 70-300 AF-D lens have an autofocus motor?

If I buy an AF-D lens, the Sigma 70-300mm for Nikon D3200, from Amazon, will it have an autofocus motor? There's a listing with "Built in Motor for Nikon". What does this mean?
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0answers
53 views

Canon 6D Auto Focus Erratic Behavior

I have a 2 year old Canon 6D which I use primarily for landscape photography and taking shots of my grandkids. It exhibits a strange behavior at times when I lift it to my eye to compose a shot. ...
3
votes
1answer
76 views

How can AF adjustment be inconsistent across lenses?

How is it that sometimes a lens will work fine on a camera body without adjustment yet others need some AF micro adjustment tweaking. I would imagine that the accuracy of the AF system with regards to ...
1
vote
1answer
93 views

What is the Autofocus type in Nikon D3300?

What is the autofocus type in Nikon D3300, Is it phase detection or contrast detection ? Or both ? If both then when is phase detection used and when is contrast detection used ? I was looking in the ...
1
vote
2answers
225 views

Does autofocus feature work on Nikon D5500 using the Tamron AF 70-300 F4-5.6 DI LD macro for Nikon?

I wanted to know if autofocus mode works on Nikon D5500 whilst using the Tamron AF 70-300mm F4-5.6 DI LD macro lens for Nikon?
4
votes
2answers
161 views

How can I more consistently focus on the point I want?

I've had so many wonderfully composed images turn out lousy because my AF isn't as accurate as I'd like (or I don't know how to wield it). Despite using single-point AF, my focus point is often ...
0
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0answers
22 views

Is it possible to autofocus a Sigma 150-600mm when using a teleconverter? [duplicate]

I'm the owner of a Canon 70D with Sigma 150-600mm lens. I'm attempting to use this with the Sigma's TC-1401 teleconverter. However, I'm not able to use autofocus via the viewfinder, but only in live ...
0
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0answers
46 views

Using manual focus ring on AF lens

Help... I have a Nikon D800E with a 70-200mm F2.8 My question is this, if I have both my camera and lens set on AF ,why do I still have to use manual focus ring to get clear focus on my subject???
1
vote
1answer
57 views

What is the worst-case scenario if you move the focus ring in AF mode? [duplicate]

I have a EF-S 18-55mm 1:3.5-5.6 III, and want to know what is the worst-case scenario if you move the focus ring in AF mode?
1
vote
3answers
124 views

Does rotating the focus ring in AF mode cause any harm?

If I rotate focus ring in AF mode, does this hurt the camera or lens? My friend today rotated the ring 1/2 times before I saw him on Autofocus on my Canon 600d with lens: EF-S 18-55mm 1:3.5-5.6 III. ...
0
votes
1answer
76 views

Canon 600D autofocus not working when using view finder but working fine with live view

My 600D's autofocus is not working at all when using view finder, when using it in live view mode the autofocus works just fine. I tried to google but could not find any concrete. Any advises? ...
2
votes
1answer
51 views

Why do phone cameras focus and defocus deliberately while clicking a macro shot?

I've tried this with many phone cameras and almost all of them focused well for macros but only for a moment before they defocus to focus something further behind. If the camera can focus on objects ...
0
votes
1answer
799 views

Best AF Fine tuning for Nikon D7000 lenses [duplicate]

Over the last few months I've been noticing an annoying back - focus problem on my Nikon D7000, regardless if I was using a AF-S or AF lens. But the problem seems to happen more often on my 35mm 1.8G ...
1
vote
1answer
436 views

What should I do if my Canon 24-105 f4 L is making focus-seeking noises but not focusing?

I have a Canon 24-105 f/4 L lens. Just today, it started having focusing problems. The problem does not manifest if the focus is easy: bright light and centre focus point is on a good contrasty ...
0
votes
2answers
98 views

How do I prevent my camera/lens from focusing on only a subject? [duplicate]

I have a Canon 70D and am using a 50mm lens. I want to prevent it from focusing on a subject all the time. Instead, I want everything to be in focus like you get with a kit lens (18-135 etc.). I have ...
3
votes
2answers
179 views

Which focus mode should I use for a portrait shoot?

I have to do a portrait shoot for a friend. My camera (Pentax K-30) allows me to focus in the following modes: 1 focus point (center) 11 auto focus points 5 auto focus points I haven't yet ...
1
vote
1answer
98 views

Can I achieve infinity focus from Auto focus? [duplicate]

I have a 18-55mm zoom lens with no Infinity symbol on it. Let's assume I want to capture stars in night. There are three ways to do it (If I am not wrong) Use Auto focus (If your camera is able to ...
7
votes
1answer
1k views

Why are photos taken with my old lenses all out of focus on my new Nikon D5300 body?

My Nikon D80 died, and I was bought a new D5300, body only. All the photographs are out of focus when I use the lenses I used with my D80. Why would this be? I'm using the Sigma 18-50 f/3.5-5.6 DC, ...
0
votes
1answer
35 views

How do I tell my T2i to use a particular spot for AF reference?

I just got a 50mm f/1.2 to go along with my T2i, but many of my photos are out of focus because the AF catches my subject's knee instead of her eyes, despite focusing on her eyes and recomposing. ...
2
votes
2answers
198 views

What's the advantage of many autofocus points rather than fewer spread wider across the field? [duplicate]

I have a D3200 with 11 focusing points: The newer and more expensive bodies have even more focus points like e.g. the D610: I mostly work in Single-point AF mode, which means I choose one of the ...
0
votes
4answers
103 views

Autofocus not working outside scene modes

I've just got my first DSLR (an old Canon 1000D) and I'm having problems with autofocus: When I'm in full auto or any scene mode (sport, portrait...) it works fine and I can make photos normally, but ...
0
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2answers
99 views

What technique can I use to focus on walking subject when in motion?

I have seen some photographers take photos while they are walking in a hallway or on street, etc.. where the setup is the person is walking towards the photographer, the photographer is backing ...