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Focus is the mechanism of converging light from a point light source onto an imaging plane by a lens.

learn more… | top users | synonyms

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1answer
29 views

How can lens cause consistent front or back focus?

I can understand body focusing problems, but I can't imagine why lens might cause front or back focus. I have two third party manufacturer lenses for my Nikon: one is front-focusing, the other is ...
4
votes
2answers
152 views

Getting a completely sharp bird when it is up close

Context So I know that Depth of Field (DoF) is controlled by your f-stop (aperture opening) of the lens in question. Question Is it possible to get birds completely sharp when they are so close ...
0
votes
0answers
115 views

Why does my photo become blurry in manual focus? [closed]

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 ...
3
votes
2answers
95 views

Eyes rapidly defocus when taking pictures

I wear glasses for an astigmatism. When taking photos, I find that my eyes lose focus almost right away, since one eye is closed and the other is looking through the viewfinder. This happens whether ...
5
votes
3answers
619 views

Since it's not “focal length”, what is the term for the distance at which things are in focus?

I was under the impression that the “focal length” of a lens is the distance at which stuff appears in-focus. (E.g., perhaps I set the camera so that objects 3 meters away appear sharp, ...
4
votes
1answer
220 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 ...
0
votes
2answers
75 views

How does aperture affect focus area? [duplicate]

How does the aperture affect the focus area? Here are some examples: With an 35mm(50mm)/f1.8 prime lens What f-value will bring a group of people standing in five rows into focus? What f-value will ...
-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 ...
2
votes
1answer
40 views

Is recomposing necessary for trap focus to work?

Trap focusing guide says: Set custom setting #A5 to AF-ON ONLY Set the focus mode to SINGLE SERVO Set Auto focus area mode to SINGLE POINT (9 point, 21 point, 51 point or 51 point 3-D will ...
1
vote
3answers
59 views

Can trap focusing damage the shutter release system?

Trap focusing requires the photographer keep the shutter pressed (point#6 below) until the object appears at the point where camera is pre-focusing. Set custom setting #A5 to AF-ON ONLY Set ...
0
votes
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
votes
1answer
50 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?
3
votes
1answer
147 views

Pictures keep coming out unfocused

I have a Nikon D70 and it seems like whenever I use manual focus everything will look very sharp through the view finder and on the camera screen, however when I open the pictures up on my computer ...
0
votes
0answers
31 views

Technique behind miniature look [duplicate]

What is the name of, and the technique behind, images of real scenes that looks like miniatures, like the one shown here? To me, at least, it looks like a photograph of a model, not a real scene. Is ...
0
votes
1answer
87 views

Focus Issues With L-Series Lens

I have a really frustrating issue with a Canon 24-70 ƒ4 L Series Lens. I noticed that it was unable to focus at or near infinity except at the wide end (when used with my 5D Mk3). When focused ...
0
votes
1answer
82 views

Is there any way of saving this blurry photo??? [duplicate]

http://i.imgur.com/Lb9FXGe.jpg Is there ANY way to save this blurry photo? I have photoshop. PLEASE HELP.
3
votes
3answers
112 views

Why is my subject still out of focus when it's inside the range shown by a depth of field calculator?

In a depth of field app, I entered my camera's sensor size, focal length of 50mm, aperture of f8, and focus distance of 6 feet. The app tells me that DoF is 2.1 feet, from 5.1 to 7.2 feet. I then ...
3
votes
4answers
142 views

How can I focus quickly outdoors in the dark?

I was with my family at a seaside, late and in darkness. My nephew and niece were playing in the water and running around, and I wanted to take picture of them, but my autofocusing system was taking ...
1
vote
2answers
101 views

What could be causing focus problems in low light?

I am not a professional photographer but shoot outdoor and indoor pictures, weddings, and portraits as a hobby. I use a Nikon D750 with a 70-200mm 2.8 VR lens and a 35mm 1.8 ED lens. I have been ...
21
votes
2answers
2k views

Why is infrared light's focus point different from that of visible light?

When reading about infrared photography, it's often mentioned that IR's focus point is slightly different from visible light. Why is the focus point of infrared light point different from the focus ...
1
vote
2answers
108 views

How can I focus when my camera is on a tripod and none of the focus points line up?

Today I was shooting two persons with my camera (Canon 7D) on a tripod. One person, the one I wanted to be in focus, was composed so far out of the center that I don't have any focus point close to ...
0
votes
1answer
29 views

How do I manually focus my Nikon P520?

Can I manually focus a Nikon P520, and can I set infinity as well? I've looked at the manual settings and I cannot find the answer.
1
vote
5answers
197 views

35mm prime lens — photo taken is not sharp in manual focus mode [closed]

I bought a 35mm 1.8 Nikon lens and am using this lens with D3200. I placed a ball on the floor and some 100 cm from the lens. I set the lens to Manual mode and aperture to 1.8, in Aperture Priority ...
1
vote
0answers
114 views

What can I do if everything with my 55-200mm macro lens is suddenly entirely blurry and the camera won't take pictures?

I have a brand new Nikon D5500. The 55-200mm macro lens is not working properly as far as I can tell. It was acting funny the other day when I was trying to take pictures. The pictures were coming ...
4
votes
2answers
162 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 ...
2
votes
1answer
79 views

Can Minolta lenses obtain infinity focus when mounted on a Canon camera?

I know this isn't the ideal setup but I have access to a good selection of Minolta glass so I can try it without any expense. I've got a Canon 600D, a "Minolta Sony Alpha AF Mount Lens to Canon EOS ...
4
votes
3answers
338 views

Does focal length change when I adjust the focus? [duplicate]

When I adjust the focus of my camera, in general, does this affect the focal length? I have heard that it does.
0
votes
0answers
94 views

Help!!! How can I deblur a wedding pic? [duplicate]

I have an absolutely beautiful photo from my wedding but it was taken by my cousin and is badly out of focus. :( Any ideas on how I could fix it? I'm not at all talented with computers so any help ...
3
votes
2answers
111 views

What's a good method to autofocus on close subjects while shooting from the hip?

Context I like to take photos of dogs using a wide angle lens on a Canon 60d, with a fast shutter speed, AI servo mode and continuous shooting mode on. I'm usually holding the camera low to the ...
0
votes
3answers
66 views

How do I focus while using an intervalometer?

Normally when I shoot 20- or 30-second exposure pictures, I use a timer--I first focus on a light source and then change the focus towards whatever I want to shoot. But this technique is not working ...
2
votes
2answers
122 views

Are deconvolution filters better than unsharp mask for correcting out-of-focus photographs?

What is the best method for enhancing image quality if a photograph happens to be out of focus? I'm using now unsharp mask but I'm looking for new methods. Perhaps there is one which has better ...
0
votes
1answer
831 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
457 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
1answer
135 views

How do lenses focus? (and zoom?) [duplicate]

My understanding of focal length is that it is the distance from the lens to the sensor; in my observations: higher focal lengths make for longer lens. Then I started thinking about how a lens ...
0
votes
2answers
99 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
181 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
99 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 ...
1
vote
2answers
268 views

Manual focus working in AF Mode with an STM lens - is this intentional?

On my new Canon T6s/760d with 18-135 STM lens, I just noticed that in AF mode, when I hold the shutter button halfway, if I turn the focus ring on the lens, it does affect the focus! I preferred to ...
0
votes
2answers
178 views

Focus problem in viewfinder mode with the tamron 17-50 f2.8

I bought my 70d and the Tamron SP AF 17-50mm F/2.8 VC. I noticed that I don't have focus when I use the viewfinder but when I use the live view there is no problem at all. Someone might come across ...
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 ...
-3
votes
1answer
112 views

What setting do I use for a 70-300 lens? [closed]

I have a 70-300 lens and I tried taking a picture of a ship on Lake Michigan. The Picture was blurry and I was using a tripod, What settings do I need to have my camera set on to get nice clear ...
0
votes
1answer
55 views

How do I work around a problem where my lens won't focus on distant objects?

I have a Pentax K10D with a 28mm lens that will not focus on distant objects. Will an extension tube solve this problem? I do not care about autofocus. Is one tube better than another for manual ...
2
votes
1answer
193 views

How does manual focus work using Leica lenses on other mirrorless cameras such as Fuji XPro1?

I used to own a Leica M4P, now I have gone digital with a Fuji X100. I love the X100 but the autofocus gives me so much trouble for street photography and its manual focus is terrible. I really ...
0
votes
0answers
83 views

600D Lens Don't Move back and front

My camera lens recently started losing focus. When I press the shutter halfway, the lens just doesn't respond and adjust focus. The flash flickers an electric sound and light but then the camera ...
0
votes
0answers
30 views

Does the Sony wireless remote commander (hardware, not the app) focus before firing a shot in Manual?

I have a Sony NEX-6 and the wireless remote commander (Please note: it is the hardware not the app). Last night, I was taking some night shots in Manual with the camera on a tripod. I set the camera ...
0
votes
1answer
100 views

Getting a sharp focus on a 50mm when the subject is at 5m - 10m [duplicate]

I'm a novice photographer with a 450D/XSi. I'm using a 50mm/1.8 prime lens to start out and I noticed that a lot of times my pictures end up not being sharp for stationary scenes. I was mostly using ...
2
votes
3answers
172 views

How to overcome auto-focusing problem in event photography?

The biggest issue for event photography I have noticed is camera not getting auto-focus at correct time. The moment you have to capture the camera is still focusing. If it would be landscape ...
0
votes
2answers
106 views

How to take a photo of a close-up object without focus stacking?

I'm trying to get into product photography and took some fun shots. I'm talking about shots of my iPhone and things like that. What I quickly realize is that I am unable to get enough DOF. I'm using ...
3
votes
1answer
302 views

Are there cameras that autofocus during an exposure?

The origin of this question is related to panning. I was trying to explain why panning is more effective for subjects moving across your FOV at right angles, vs. a subject whose distance to the ...