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Questions tagged [autofocus]

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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183 views

Why does my superzoom lens sometimes miss focus?

I've got a Nikon D7500 with the AF-S DX 18-300mm zoom, a combination I love. I do a lot of outdoor photography and find myself switching between wide angle and telephoto repeatedly as different shots ...
3
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2answers
72 views

Are there autofocus-enabled adapters for Olympus lenses on Canon EOS cameras?

Fairly new to photography so forgive my foolishness before calling me out, I already know. I bought a Olympus 50mm F1.8 lens thinking it was a manual focus but when I received it I realized I misread ...
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2answers
110 views

Focused properly and microadjusted lens give blurry image on Canon 80D and quite fine detail on 350D

I'm an unhappy owner of brand new Canon 80D. I still have 350D which served me for nearly a decade. I use the same 24-105 1:4 L IS lens with both of them. It turned out that lens is blurry. I've ...
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2answers
110 views

Why are subject's eyes out of focus with EF 28-70mm F2.8 L?

I purchased an older 28-70mm F2.8 L Series lens. I'm trying to use it to take portraits on a Canon 5D Mark III. However, when I use autofocus at 70mm, the eyes are not in focus and the face seems ...
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137 views

Autofocusing issues with my Canon EOS 6D and a Tamron 24-70mm f/2.8 - What is to blame?

I bought the Canon EOS 6D a few weeks ago, and I love it. One issue though is the autofocusing. I am using a Tamron 24-70mm f/2.8 and at times (way too often!) the camera refuses to focus at all. ...
4
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1answer
132 views

Can I adjust the autofocusing of my Canon 6D Mk II myself?

So I took my 6D II into CPS for service. It was front focusing pretty hard and I couldn't get it micro adjusted. Canon sent an invoice stating exactly "focus points are off, unit is front focusing, ...
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2answers
105 views

Why does my lens only autofocus when I have a teleconverter attached?

My Nikon 500mm f/4 AF-S D IF II lens won't auto focus on a Nikon D500 until I attach a Kenko 1.4x teleconverter — then it autofocuses fine. Does anyone know what's going on?
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128 views

Does on-sensor phase detection autofocus need adjustment for accuracy?

Is autofocus adjustment actually no longer required with on-imaging-sensor autofocus that's phase-detection only i.e. not relying on contrast detection? If not, why? How does lens autofocus adjustment ...
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3answers
132 views

What equipment would be best for a new photographer, interested in macro nature photography?

I recently started a photography class and I really like it, and I want to start taking photos outside of school with my own camera but I don’t know what to get. I love taking close up pictures of ...
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1answer
46 views

Can Magic Lantern provide missing Autofocus Microadjustment (AFMA)?

I want to upgrade my Canon DSLR to either a 50D or 550D. The only thing that I find really lacking in the 550D is autofocus microadjustment (AFMA), but there is free Magic Lantern software, which I do ...
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266 views

Can Magic Lantern provide AFMA on an EOS 77D?

I want to upgrade my Canon DSLR to either an 80D or 77D. The only thing that I find really lacking in the 77D is AFMA, but there is free Magic Lantern software. Can I safely assume, in practical terms,...
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1answer
49 views

Auto Focus Lamp: Nikon

I don't know what happened but my AF lamp doesn't work any more. The bulb is not burnt out because it flickers when \i tested it with the 10 second timer. The problem comes when I'm trying to find ...
3
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1answer
172 views

How to set “release priority” rather than “focus priority” on Canon DSLR?

FujiFilm X-Series cameras can be set for focus priority or release priority. This controls the camera behavior when AF cannot lock. On focus priority, the shutter will not release. On release priority,...
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2answers
75 views

How to accurately determine the size of a nearby object (~15cm) using the autofocus focus distance?

The problem I'm trying to determine the size of an object using the focus distance determined by the autofocus of a smartphone camera (Galaxy Note 8). But I don't seem to be able to get an accurate ...
3
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1answer
100 views

Nikon only allows single photo in auto mode or if flash is used

Basically what is happening is if I start my Nikon D5300 in AUTO and take a picture it will only allow me to take that one picture and not allow me to take another picture at all. The autofocus stops ...
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1answer
60 views

How to prevent autofocus but retain tethered focus control?

I'm using Darktable (on Linux) with Canon 1100D in tethered shooting mode. I found out that from live view section I can control focus in big or small steps. This all works nicely, and I can see the ...
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1answer
94 views

How to diagnose old Canon EF 35-105mm lens with autofocus motor too weak to reliably rotate lens barrel?

I bought a couple of old Canon EF lenses and they are very slow at autofocusing on my 350D. The worst offender is the EF 35-105mm f/4.5-5.6 USM. This lens regularly gives up moving the barrel after a ...
2
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1answer
110 views

Does time lapse of the sun damage the auto-focus sensors or components of a DSLR?

This question is not about the main imaging sensor, but about the autofocus sensors and circuits on a DSLR. I read that sunlight may damage the shutter or the main sensor. But when using the DSLR, ...
2
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2answers
166 views

Autofocus Sigma 17-70 Macro OS HSM not working on D3300

I've purchased a used Sigma 17-70mm f/2.8-4 DC OS HSM for my Nikon D3300. It appears to work fine, with one exception: the autofocus. I've checked the switch on the lens and it is set to AF. However, ...
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2answers
45 views

Sigma DC 18-250mm Macro HSM Lens Autofocus not locking to let me click the picture

I was travelling on a trip with my camera. One day I was using my Sigma DC 18-250mm Macro HSM lens on Canon 70D in autofocus mode to take a picture. When I pressed my shutter button halfway to focus ...
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1answer
112 views

Why is my Canon 500D able to autofocus only after I manually focus it to the shortest focus distance?

While on holiday, my Canon 500D with EF-S 18-55mm lens stopped autofocusing at all. After fiddling, I’ve discovered that it only focuses when I manually turn the focus to as close up as possible, ...
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1answer
229 views

How to focus Nikon cameras in low light?

I've been using my Nikon Df every day for 2 years now, and I still can't figure out focusing, especially in low light. Focusing in low light is slow, and sometimes does not work. Sometimes focus will ...
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1answer
87 views

Why does my “ultrasonic” lens have trouble focusing in low-light and low-contrast scenes?

Passive autofocus systems like contrast detection and phase detection don't work well in low-light environments and on low-contrast areas. But I have a lens that says "ULTRASONIC" on it, and it ...
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2answers
148 views

How to get more pin sharp shots with a lens known for inaccurate autofocus?

I have the Tamron 70-200/2.8 Macro lens (used on a Nikon D800), which is known for its inaccurate autofocus. Since I cannot rely on the lens to achieve accurate focus every time, the rational thing to ...
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0answers
70 views

Losing sharpness - lens AF broken? [duplicate]

I have an 10 year old camera (Canon 400D) and primarily use a fixed Canon 1.8 50mm lens. This weekend I was using it and noticed most of my photos with that lens looking blurry and unfocused. Over ...
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2answers
136 views

My DSLR's autofocus doesn't work after I dropped it — how can I narrow down the problem?

If I try to focus by the shutter button the image doesn't change, even in live view (and I'm not be able to shot a picture). But if I hold the "AE-L/AF-L" button and click the shutter button I'm able ...
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1answer
178 views

Panasonic Lumix TZ100 - how to stop autofocusing and just get everything in equal focus?

I’m an amateur photographer and would like to ask for some help! I’ve recently bought a new camera, a Panasonic Lumix TZ100. Before that for 5 years I was using a Canon Ixus 255 HS. So far I haven’t ...
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1answer
72 views

Autofocus not working on Canon 20D

i have a Canon 20D and i cannot get the autofocus to function correctly. Whenever i try to autofocus the lens will go to the closest focus and stay there. If i press the shutter button again it will ...
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3answers
112 views

Why does my autofocus sometimes set the aperture, after the lens was in the rain for several minutes?

I'm using a Canon EOS 60D with a Canon 40mm f/2.8 STM. I bought both used about a week ago. I've had no problems except for one: sometimes the autofocus only jumps between two apertures, and the ...
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1answer
467 views

Why isn't a Sigma HSM lens autofocusing with my Nikon D5600 — is there a compatibility problem?

Today I had a chance to try a Sigma 70-200mm f/2.8 EX DG OS HSM, a 2013 model lens, on my Nikon D5600. Everything was okay. I was able to take pictures with it. But auto focus didn't work as it should....
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2answers
122 views

Why do camera bodies and some lenses both have autofocus / manual switches?

Why is it that lenses come with an AF option when the camera has the same? Which controls the AF? One would think that they contend with each other for control. Why have two entities doing the same ...
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1answer
386 views

Nikon D3300 autofocus issue

I just bought a Nikon D3300 from a guy from eBay. (Actually not eBay, but a Dutch website, same concept). It came with 3 lenses: an 18-55mm kit lens, a Tamron 18-270mm f/3.5-6.3, and a 50mm f/1.8 lens,...
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3answers
1k views

Focus point causing unsharp images?

It seems that some pictures I’m taking just aren’t tack sharp, I’ve been shooting in Aperture Priority and I’ve made sure to avoid camera shake and such. Based off the picture below what would be a ...
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2answers
101 views

Distortion towards the edges/corners of the field of view in an image

I am taking a picture keeping the camera horizontally in landscape mode from a height of roughly 3-4 ft, acquiring the top-view of the scene. It was seen that the objects placed towards the centre of ...
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1answer
55 views

Does the autofocus work only if we touched an AF point on the camera's touchscreen?

As in here, if we touched the area outside that is covered by squares, nothing would happen or what?
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1answer
177 views

Tamron 70-200 f/2.8 autofocus lagging

I took my lens out to my first gig as I am a local band photographer. I took some photos in auto and most in manual. It seems there's a little lag in the autofocus or am I doing something wrong. I ...
2
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1answer
131 views

Telephoto lens will autofocus but not shoot

I have a Nikon D3400 with two stock lenses. My Nikkor 18-55 mm lens performs well. My 70-300 mm lens, on the other hand, developed an issue in the last month. The autofocus of the lens works well, but ...
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3answers
901 views

What zoom 70-300mm lens should I get for my Nikon D3300? [duplicate]

I'm a total beginner when it comes to photography. I have a Nikon D3300, and want to branch out to a zoom lens. I did a little research and found a lens I wanted, the 70-300mm f/4-5.6G. I found one on ...
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1answer
708 views

70-300 AF-S Lens Won't Autofocus on one of my D7100's

I recently purchased a used Nikkor 70-300 AF-S VR lens used from B&H that is in "Excellent" condition. I have 2 Nikon D7100 bodies that I shoot with and both autofocus just fine with all of my ...
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1answer
270 views

Fujifilm xe3 won’t focus or take photos

I’m new to photography but I bought an xe3 today, pressed some buttons, and I’m not sure what happened but my camera won’t focus now. In the photo, it’s on auto and I’ve tried changing the settings, ...
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2answers
549 views

Tamron lens focusing problems?

I own a Tamron 18-270mm F/3,5-6,3 Di II VC PZD lens - a fabulous lens, but since I got it (around Christmas time), the autofocus has been playing up; see below image. EXIF is as follows: 270mm, ...
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1answer
337 views

Is there an adapter for Fuji X mount cameras for canon ef-s lenses that allow autofocus and metering?

I have a canon 700D and contemplating buying a second hand Fuji X-T1. But I have invested in a Sigma 18-35 F/1.8 and am very happy with it. Is there an adapter for the EF-S mount lens that will allow ...
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0answers
33 views

Menu/Picture Preview NA, Automatic Focus not working

I have a Canon Rebel XSI. It is from 2008. Original everything except lense. I cannot get the menu option to display in any mode, pushing the button does nothing. I cannot get any pictures I recently ...
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1answer
206 views

Nikon D3200 focus problem

I have a problem on Nikon D3200 with autofocus, using viewfinder it works in cca 70% cases, sometimes it has a problem to focus on objects (which distance is relevant). Using liveview it works ...
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0answers
54 views

autofocus not working, pentax k-01 with DA 18-135

pentax k-01 with latest firmware (1.05) pentax DA 18-135 lens autofocus does not work, MF is displayed no matter of the position of the AF/MF switch. 18-55 lens works fine. is there a setting that I ...
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3answers
400 views

Tokina 100mm Macro f2.8 D wont autofocus on a Nikon D7500

I just got this camera recently with the lens aformentioned, however upon usage, I wasn't able to autofocus anymore. Any fix?
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1answer
1k views

Canon EF 50mm f/1.4 stopped focusing? [duplicate]

I have a Canon EF 50mm f/1.4 that refuses to autofocus. When I mount the lens, turn on the camera, and press the buttons to begin autofocusing, nothing happens. I don't even hear the AF motor trying ...
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2answers
778 views

Why won't my Nikon D5500 autofocus?

Total newbie here! I have a Nikon D5500 - when I bought the camera I had no clue there was a difference between auto focus and manual focus so I have ALWAYS manually focused the camera. I want to ...
3
votes
1answer
70 views

Focus keeps shifting while recording from a moving bus

We were in a bus moving out of a snow and mountain region, and i was trying to record some sceneries with mobile camera. Camera was set to auto focus mode which generally works well for me but in this ...
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1answer
397 views

Nikon D3300 with AF-P VR wont focus

I bought Nikon D3300 with stock lens AF-P 18-55 VR and it worked great for about an year. But during our last trip focus stopped working. Keep in mind I am very casual photographer. I found this Q&...