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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8 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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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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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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125 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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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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2answers
190 views

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 in 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 AF ...
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58 views

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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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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3answers
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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2answers
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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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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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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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1answer
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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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103 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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1answer
190 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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2answers
181 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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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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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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124 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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920 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
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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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2answers
143 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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2answers
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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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1answer
328 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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3answers
121 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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4answers
556 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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161 views

Does the autofocus system look through the lenses?

I have a doubt about the effect of putting a filter (polarizer, UV etc) on the autofocus system. In theory, a lens which is put in front of the lens will affect the focus (we must set a different ...
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1answer
175 views

Confused about AF, AF-S (Nikon Autofocus)

I have a Nikon D610. I thought it would work with AF lenses, but my Nikkor AF 50 mm 1.8 D doesn't autofocus, Same for the Yongnuo 50 mm 1.8 AF (the Yongnuo has a MF/AF switch on the lens). Are these ...
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507 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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Are electronically parfocal RF lenses parfocal enough for fireworks photography with zoom?

Within a month or so, it's the first time I'll see fireworks as an owner of a good camera and naturally I'm planning to take photographs of them. By researching various fireworks photography sources, ...
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2answers
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Is there any test data available that characterizes performance of Canon's “AI Servo AutoFocus”?

After trying numerous recommendations for setting Canon's AI Servo AF, I am getting only the rare in-focus picture of small birds in flight in their native environment. Based on this I have formed an ...
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1answer
159 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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2answers
451 views

AI Servo does not support Live View mode for Canon 1DX Mk ii

I've been doing some experiments with my AI Servo Autofocus system in my 1DX Mk ii. Basically, the experiments were intended to help me understand some of the rather confusing jargon used to describe ...
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1k views

Nikon D5200 no longer focuses

It used to be that on my Nikon D5200 camera holding down the shoot button halfway the viewfinder would show green dots and it would focus nicely. Now after resetting the camera settings, replacing ...
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4answers
383 views

Is it possible to use a follow focus to add AF to MF lenses?

I recently switched from a EOS 7D to a Sony a6400 and since I have to buy new lenses I saw the huge difference in price between compatible AF and manual focus lenses. I also stumbled upon this: ...
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6answers
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Why aren't faces sharp in my f/1.8 portraits even though I'm carefully using center-point autofocus?

I love my Canon Rebel T6 and take portrait pictures in Av mode with a 50mm in 1.8 Av. I'm using auto focus in the 'focus on center point' mode. I make sure that the center point focuses on the face so ...
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How can a subject stay in focus if the shot is recomposed afterwards?

I have a doubt about a procedure that I see many photographers continuously apply and they taught me. I see that, when they want to take a picture with their reflex, they do this sequence of steps: 1)...
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2answers
278 views

What lenses for a Nikon camera have both an AF motor and an aperture ring?

I have a Nikon FE10 35mm film SLR and a D5600 DSLR. I want a wide focal length prime or mid range zoom (nothing longer than 120mm) to use on both cameras. I need an aperture ring for the film SLR ...
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58 views

How to set AF area mode viewfinder if values are gray (can't be chosen) on Nikon D3500?

When setting AF area mode viewfinder on my D3500, I can only chose 2 options out of 4: single-point AF and auro-area AF. The remaining two: dynamic area AF and 3D-tracking are gray and the camera says ...
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218 views

What should I do when the results from Reikan FoCal show flaws?

I've done an AFMA calibration Reikan Software. Assuming this was properly executed, do I need to take the results seriously? All my lenses do suffer from astigmatism, and also my new Canon 24-70 f2.8 ...
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4answers
1k views

How do fixed lenses “focus” on things at different distances? [duplicate]

I'm trying to understand depth of field and I'm struggling. If I'm playing with a 50mm fixed lens, and I alter its focus using the little ring around the lens, what is actually changing in terms of ...
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1answer
160 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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Could someone share AF calibration settings for Sigma 18-35mm lens on Nikon D3300?

I have auto focus problems with Sigma 18-35 which I recently bought on D3300. I would like to see other's AF adjustment/calibration settings. I am having a hard time with setting it up. Are the ...
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642 views

Focusing issues on live view - Nikon D750 w/ AF-S NIKKOR 24-70mm f/2.8G ED

On a heavily used Nikon D750 w/ AF-S NIKKOR 24-70mm f/2.8G ED: When using live vision, ussualy while holding the camera up over my head, autofocus focuses nowhere. This happens right after having ...
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2answers
304 views

Focussing area is different in live view than when viewed in viewfinder

When I use the AF-S mode or any other mode through the view finder, I can see an area in which the focus point can be moved. It is relatively small. What if I want to focus out of that area or focus ...
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3answers
97 views

What should I do when autofocus is not working after i dropped my camera? [closed]

Yesterday i had dropped my camera and everything is working except Auto focus while using view finder but on LCD it is working fine and pictures are coming good. All is good except Auto focus, I ...
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1answer
131 views

Nikon D5100 struggling to autofocus on screen, but fine through viewfinder? [duplicate]

hope you can help me and my frustrating issue I have a D5100 with a Sigma 18-250mm f/3.5-6.3 dc os lens which will AF no problem at all when I'm looking through the viewfinder but when I change to ...
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119 views

When using Back Button Auto Focus, do I release the button before shooting a sequence, or hold it down?

When shooting moving subjects (Sports), am I suppose to keep the back button AF pressed during a sequence of shots? Or do I press til it focuses, and then let go and shoot a sequence? Thank you in ...

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