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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Limit focus range of Panasonic Lumix DMC-FZ330

My Panasonic Lumix DMC-FZ330 has a button on side of the lens that only focuses on close objects for macro photography, or focuses on more distant objects for non-macro photography. Is it possible to ...
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confusion about the principle of on-sensor PDAF technique

There are a lot of pictures over the internet illustrating the principle of phase detection autofocus, such as this one https://www.androidauthority.com/how-pdaf-works-1102272/ The simplest way to ...
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Does the number of phase detect auto-focus points affect focus accuracy in mirrorless cameras?

Does the number of phase detect auto-focus points affect focus accuracy of a mirrorless camera? And if so, how and why? I am considering buying either a Nikon Z6 II or a Z7 II. They have 273 and 493 ...
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178 views

What part of Canon 50mm f1.4 is responsible for failure to autofocus?

I have the Canon 50mm f1.4 which had the common focus issue due to deformed inner focus ring. I have straightened the ring and the lens now had full range of manual focus, but Autofocus cannot find a ...
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55 views

Nikon D5600: AF area mode (no of focus points ) doesn’t work in any of manual mode (aperture, shutter, manual) for any focus Mode?

AF-area mode (no of focus points 9, 21, 39 ) doesn’t seem to appear in viewfinder in manual modes (aperture priority, shutter priority, manual) for any focus mode (AF-A, AF-C), only it focus/shows a ...
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43 views

D5300 Autofocus

I broke my 18-55 kit lens months ago. And i currently have no lens in my hand. But i usually hover over my camera setting for no reason. Tonight i charged my battery and then playing with the settings ...
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161 views

Fuji 35mm 1.4 stuck in manual focus mode?

I know that to go into autofocus mode the lens ring needs to be pulled out. However mine is completely stuck! I am a member of the Fuji VIP program and have received a faulty lens before. I got ...
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220 views

Polaroid Sun 660 problem

I need help with one Polaroid sun 660. It seems that auto focus is not working at all. After investigation on internet i noticed that this camera has a 4 disc lens , so every time that you press the ...
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7k 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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538 views

Why doesn't lens focus after turning focusing ring while set to autofocus?

My brother tried my new camera and was turning the focusing ring quite harshly on auto focus. (50mm canon lens) I’ve read multiple similar questions but nothing is quite what I mean. Ever since my ...
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Autofocus glitches in Nikon menu for Sigma 18-50 f2.8-4.5 lens

I have sold a Sigma 18-50 f2.8-4.5 OS HSM to an internet buyer. The lens worked fine, but after receiving it today, he said that whenever he turns on autofocus on the lens the camera has a glitch in ...
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82 views

Dismissing red frame in close up [Canon EOS M50]

Is there a way to take a shot even though the red frame indicating out of focus appears? When I am trying to take a picture few inches away from something the red frame appears. Someone asked similar ...
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d5000 autofocus malfunctioning?

I think my d5000 (or lens?) AF is malfunctioning, but I'm not sure. I'm using the stock lens (Nikon DX, AF-S NIKKOR 18-55mm) It takes seconds (like 7 seconds) for it to find focus and seems to keep ...
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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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Why won't my Fujifilm X-T2 take pictures when I press the shutter?

I'm having a problem with my Fuji X-T2; it doesn't make pictures anymore. When I try to press the shutter, it will focus and it makes the focus sound but then it does nothing when I press the shutter ...
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127 views

Can an infrared light source be used for focusing in the dark?

When I shoot pictures of badgers I recently found that the Nikon D500 + 200mm F/2.0 is a great combination. Badgers often come out very late when its quite dark but they cant see too well so you can ...
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205 views

What to do with a Nikon D750 body that when switching lenses won't autofocus?

There was another similar question out there and one of the responders commented there was and he got his camera body replaced. I've been having the same issue with my new nikon just bought in January....
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Eye-AF from Nikon Z6 is inconsistent or fidgety

I have a Nikon Z6 – latest firmware (ver. 3.12, from October 2020). As far as I can remember since Eye-AF was first introduced in May 2019, I've been having a hard time have the eye-AF locked on the ...
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Why does my Nikon D3100 no longer auto-focus via the viewfinder?

My Nikon D3100 out of the blue cannot focus correctly. It seem the that the focus motor always stops at the end of the run (Infinity) and cannot lock on the target, thus cannot release the shutter. I ...
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1answer
106 views

Can a lens affect relative performance of autofocus points?

I am comparing the autofocus performance of my Nikon D800 with two lenses, A Sigma 150-600 C (post sigma-dock calibration) A Nikkor 50mm 1.8G (post AF fine tune). Both lenses focus well with the ...
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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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What does “number of AF points” mean in scope of Canon's Dual Pixel AF

According to the Canon's Dual Pixel AF system paper, "EVERY pixel on the sensor can provide AF information [skipped]. Figuratively speaking, instead of hundreds of potential "focus points,&...
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Will Nikon AF-S “G” lenses autofocus on D3xxx bodies?

When I checked the site of Nikon for D3300 camera, I found following description Autofocus is available with AF-S and AF-I lenses; Autofocus is not available with other type G and D lenses, AF ...
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520 views

autofocus shown in viewfinder and captured on actual pic is different

Equipment : Nikon D7000, Godox Flash on camera with soft box diffuser. Background: I have been assigned the task by my family to make portrait albums of the identical twins born to my close relative. ...
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Why is my Nikon D5500 unable to lock focus while using Live View but works fine when using the ViewFinder?

It just keeps trying to find focus. If I press the half-click focus button I hear the motor moving and the numbers on my lens go from smallest to infinity and stop. If I press the half-click focus ...
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37 views

Use of AF button and AF Mode in Canon DSLR?

In Canon 1300D DSLR with Telephoto Lens, I have the doubt on the use of, the AF switch on the lens and Auto Mode in the Camera Mode Dial. When to use either of this, or is the AF/MF switch something ...
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4k views

Macro photo that I cannot repeat

I have an iPhone SE 2 with pretty standard 12MP camera and as I was sitting on our porch and browsing the web I randomly enabled the main camera and took a shot of my sweatpants fabric (no joke here): ...
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1answer
5k views

Why won't my Fujifilm X-E3 focus or take photos?

I’m new to photography but I bought an X-E3 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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19k views

How can I get everything in focus? (Why can't my camera just use all of its focus points at the same time?)

I have a Canon 550D with 70-200 f4 and 50mm prime lenses. Although the camera has built-in 9 focal points, I sometimes face a strange problem. Here's a sample photo: In reference to the above pic, ...
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494 views

Does cleaning the camera sensor affect its autofocus capabilities?

I cleaned my dirty sensor of nikon d3400 few days back and the dirt spots are gone now. But a random thought came to me which is troubling me now. I wanted to know if cleaning the sensor could alter ...
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161 views

Canon 50 1.8 STM: AF adjustment not possible?

My 50 1.8 STM back-focuses a little when focused through OVF. I visited Canon Service in Bangalore today. The technician there outright told me that there is no adjustment possible for 50mm 1.8 stm ...
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104 views

Unable to take the shot when subject is moving fast

I am recently trying to experiment with types of photography that I have not done much before before. One of these is photographing subjects that are moving towards or away from me. But I have ...
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2answers
183 views

How to proper focus for sharper images?

For shooting landscape photos, what is better using manual focus or automatic focus? I seen a lot of people who focus with automatic focus then switch to manual focus, is this so the focus doesn't ...
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2answers
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Different focus on different parts of the picture

I have a problem with the camera on my Xiaomi Mi A2. It mainly occurs when I take pictures of things far away. This problem is consistent. I have added a few pictures. You can see in one of the ...
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1answer
167 views

AF Fine-tune zoom lenses?

How do you fix / fine-tune the focus on a zoom lens? Nikon states The D850 can fine-tune autofocus automatically. The results can be used with all lenses of the same type. But does it also mean ...
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5answers
27k views

Why does my Nikon D3100 not fire the shutter in autofocus mode?

So I just got this Nikon D3100 Camera. And I am trying to take a picture using autofocus with the kit lens(18-55mm). The system is in Auto mode, AF-A, single frame and the lens A-M switch is on "A"...
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5k views

My viewfinder won't autofocus but live view focuses well

I have a Canon EOS Rebel T5 camera and I've been running into an issue lately that I do not know how to solve. The autofocus while using viewfinder does not work at all; I could not even take a photo....
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943 views

Why won't a Tamron AF LD 200-400mm f5.6 model 75DN autofocus on Nikon D3300? [closed]

Can anyone tell me how to work the autofocus on a Tamron AF LD 200-400mm f5.6 model 75DN? I have tried numerous settings on the f-stop ring with no success and there is no auto/manual switch. It will ...
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1answer
117 views

What could cause the focus to be off in some images and not others?

I took a number of photos like the one here. Each was at the same settings but each time I asked the camera to focus (with a single focus point) and the focus point right on the girls face. The ...
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1answer
579 views

Why won't the autofocus on my Nikon 200–500mm ƒ/5.6E work?

I can't seem to get the autofocus on my brand new Nikon 200–500mm ƒ/5.6E lens to work. All the settings (on the lens and camera, including AF switches) are set to autofocus. Trying other lenses on ...
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2answers
11k views

Is the “One shot” mode more accurate than “AI servo” using back-button focus?

By using back-button focus you don't have to switch from "AI servo" when photographing stationary subjects. I tend to do this anyway since I have the feeling it's more accurate even when I can ...
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2answers
148 views

Canon T7i focus indicator misbehaving [duplicate]

On my Canon T7i, in the viewfinder, there is a circle that shows up when focus has been achieved. That is not functioning correctly now. I am using it with a 24mm f2.8 Canon lens. The focus ...
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344 views

EOS 5D Mark III for photo and video in 2020 [closed]

Is the 5D Mark III a good DSLR for both photography and videography in 2020? Does it support features such as tracking or continuous AF in video mode? I did some research but I didn't find a clear ...
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147 views

How big is an AF-Point in a Nikon camera?

I have a Nikon D7500 and am looking for information regarding the size, in pixels, of each individual AF-Point in the 51-point AF system. When stored in NEF files, Nikon references their AF-points in ...
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96 views

Nikon D-750 autofocus not working

The autofocus doesn't work on my 2 year old Nikon D-750. Doesn't work with any of my lenses. The AF is set on both the camera body and lens.
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3k views

Why is the autofocus not working on my Canon EF 70-200mm f/2.8 L IS II USM?

I bought the EF 70-200mm f/2.8 L IS II lens and the autofocus is not working. It's non-functional. I can use the lens in manual mode but not in autofocus. What could be the cause?
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3answers
124 views

Remote flashlight device for focusing in an off-camera flash scenario

I was shooting in a fairly dark room with two Yongnuo YN560 IV off camera in softboxes and a Yongnuo YN560-TX II on the camera to trigger them. I was not able to focus without having someone hold a ...
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2answers
611 views

Can I get this nikon d750 repaired or replaced?

I searched for answers on why my autofocus stopped working for my Nikon D750. I found that someone posted: “Note that when using AF lenses that are not AF-S lenses the AF/M switch on the camera ...
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612 views

Should I use automatic focus or manual focus for bird photography?

I have a Canon Rebel XTi and some decent lenses. I am considering getting a 500-1000mm f/8 telephoto zoom lens. For photographing birds that are 25-100m away, should I use an automatic focus or a ...
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4answers
742 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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