Alley in Pisa, Italy

by Lars Kotthoff

submit your photo


Hall of Fame
View past winners from this year

Please participate in Meta
and help us grow.

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

learn more… | top users | synonyms

14
votes
3answers
2k views

Why does using a tilt-shift lens make things look miniature?

This question isn't so much about how to achieve the effect of making a scene look like it's modelled in miniature, but why tilting the focal plane creates the effect. What is it about photographing ...
0
votes
1answer
640 views

Auto-focusing problem on a Canon 500D with a EF-S 18-55mm 1:3.5-5.6 IS(standard kit lens)

I'm having problems with the lens. I've tried auto-focusing with my other lenses, and it works fine. It can only auto-focus one way, i.e. the focusing ring is still able to move, but only able to turn ...
7
votes
4answers
1k views

Why are my photos taken at f/11 less sharp than those taken at a wider aperture?

I am new to photography. I have Fujifilm FinePix HS10 camera. Lately I was trying my hands on landscape photography. I learnt from different tutorials that setting high aperture value gets most of ...
8
votes
4answers
3k views

Is it difficult to focus on 1.4F prime lens, and if it is how to counter that?

Does difficulty in focusing have anything to do with 1.4F (Nikon G)? Will it be still difficult if I use manual focus? Is auto focus too slow? Is there a way to counter it? This example photo (from ...
7
votes
4answers
671 views

Why does my lens focus better/faster with a speedlight attached to the camera?

I have a Nikon d90 and have often found that the camera reaches focus faster, with less re-adjusting and missing the focus, when I have a speedlight (the Nikon sb-600 in my case) attached. Why is ...
32
votes
7answers
6k views

How can I get sharp manual focus despite poor eyesight?

I suffer from astigmatism. It's only mild, though I feel it's affecting what I'm seeing when looking through the viewfinder. Frequently, after shooting a photo with my Canon EOS 7D, I'll load it into ...
2
votes
2answers
218 views

Why doesn't pixel peeping with magnified Live View give the sharpest possible image?

I've seen this comment (most recently in this question), or similar, in several answers here on photo.SE: "Pixel peeped images aren't likely to look sharp". Why is that? It would seem to me that if ...
6
votes
3answers
707 views

How can I achieve this effect, where the flower is sharp and everything else is blurry?

I was wondering how it is possible to take a picture like this. Please have a look here for some example pictures. The flower is sharp, and everything else looks like taken with a long shutter. Is ...
6
votes
4answers
1k views

Are there macro focusing techniques for handheld shots?

I know that when doing much macro work that the autofocus system is nearly useless. When hand holding and trying to manually focus, I find myself continually going a little too far or just not far ...
2
votes
2answers
327 views

How can I find which lenses have “Continuous manual focus”?

Canon lenses with USM auto focus can be called "continuous manual focus" (at least some). By this I mean that you can override the AF without switching it off. I've found this very handy, and I often ...
10
votes
2answers
2k views

Is it possible to measure distance to an object by adjusting the focus?

This is maybe not a 100% on topic photography, but I couldn't find a better stackexchange site to post this on and maybe you guys can help me out. I have a camera that takes pictures of a production ...
8
votes
4answers
2k views

How can I get maximum DoF with no distance markers?

I am aware of what hyperfocal distance is and the general principles behind it. However, most of the tutorials I have seen and read regarding it make use of lenses with focus distance indicators. ...
6
votes
4answers
884 views

How can I get sharp images using optical zoom function on a point-and-shoot?

We’ve got a point-and-shoot (Canon A590 IS), and it seems that the zoom function is completely useless because it is always blurry, even in broad daylight. For example, I tried to take a picture of a ...
13
votes
7answers
641 views

How do I get proper focus when photographing lightning strikes?

I've been lucky to have the opportunity to photograph several large thunderstorms in Colorado recently, however I ran into a couple issues. The first issue I've run into is getting proper focus. As a ...
5
votes
3answers
2k views

Are there advantages to using a viewfinder for focusing instead of using a camera's rear LCD screen?

Are there any particular advantages to using the viewfinder for focusing instead of the LCD?
6
votes
1answer
359 views

Does focus breathing make a lens slower when close focusing?

I've heard that focal length of some lenses will become noticeably longer when focusing to a close distance, an effect called "focus breathing". Since f-number is focal length divided by diameter of ...
2
votes
2answers
1k views

Is there a way to do focus bracketing on Nikon D90 with Nikkor 105mm f/2.8?

One feature I loved in my old Canon G6 was the ability to do focus bracketing in macro photography. Any hope of focus bracketing using my Nikkor 105mm f/2.8 macro lens on my D90 body?
12
votes
2answers
727 views

Does a crop sensor affect closest focusing distance? Why does it not affect focal length in EXIF data?

Since I am considering to buy the Nikkor 105mm micro VR, I wondered if the cropped sensor does affect the closest focusing distance of 0.31m? Thinking about this, the following additional (and ...
7
votes
1answer
5k views

How do I determine focus points in Adobe Lightroom?

Not sure if this is possible or not in Adobe Lightroom. I would like to see the focus points chosen by my Canon DSLR. I am guessing this is stored somewhere in the EXIF, but I'm not certain. I find ...
5
votes
1answer
354 views

Is it possible to get tethered focus and aperture control with any current DSLR?

I'm looking to get into some photography work and I had a couple questions. I'm quite an amateur at this, unfortunately, so I would appreciate any and all assistance! I want to be able to control the ...
3
votes
4answers
1k views

How to avoid soft image at longest focal length with telephoto zoom lens?

I have a Tamron 70 - 300mm lens. I have noticed that the best focus I can achieve at the 300mm setting is not as sharp as the focus I usually get at a lower setting. Is this a common problem? Is there ...
7
votes
4answers
723 views

Which is better - autofocus and recompose vs. manual focus?

In some occasions autofocus doesn't focus what I intend it to. What is the better option - to use autofocus, focus what I want and recompose, or use manual focus in that situation?
4
votes
2answers
1k views

Is it normal for focal length to change while focusing?

When I change the focus distance on my Pentax 55-300mm lens, the focal length appears to change. More specifically, the lens appears to zoom in as I focus towards the minimum focusing distance. This ...
10
votes
6answers
1k views

How to micro-adjust distance for focusing in macro photography?

I'd like to take macro photos, but I have a problem with the focus. I put the object on a (light) table, I put my camera on my tripod and take a few shots. Since the depth of field is very small ...
2
votes
1answer
179 views

What types of rangefinders are there and what are the differences between them?

I have watched videos on YouTube showing the view through the M9 viewfinder, and it appears that only a small window in the middle allows you to focus. However, I once tried out an old Voigtländer ...
2
votes
2answers
2k views

How can I see photos on my PC as I shoot them?

I am trying to find out how to use manual zoom. Can I connect the camera to my laptop and see the images on PC as I shoot them? I have a Canon 550D Rebel 2Ti. Do I need any special cables for this?
4
votes
2answers
420 views

How can I achieve well focussed and sharp images at long focal lengths?

Well I guess this is a question every newbie asks. I have a Canon 550D with the 18-135mm kit lens. I was out on a small trip in a nearby town to take some good snaps with my DSLR. I know the lens ...
7
votes
1answer
5k views

What are the AF-A, AF-C and AF-S autofocus modes, and how and when should I use each one?

I have seen these autofocus options on all my Nikon DSLR cameras (D50, D80, D90) but I have never really used them. There is the AF button on top. What are AF-A, AF-C, and AF-S ? How do I use ...
8
votes
3answers
1k views

How can I take photographs with a large depth of field?

I was looking at some pictures by TSO Photography, and I was struck by how everything in the image seems to be sharp and in focus. I do realize that to achieve huge depth of field, you set the ...
21
votes
3answers
6k views

How can a 18-55mm lens focus on objects beyond 55mm?

I guess this is a total noob question, but doesn't 18-55mm mean that it can focus only up to 55mm?
6
votes
3answers
479 views

Do still photographers use follow focus, as filmmakers do?

Is a follow focus system beneficial to photographers in low light or other situations? Almost all professional filmmakers use a similar system to manually focus lenses, but I am not aware of ...
2
votes
1answer
394 views

Why is my Canon Powershot A1100 focusing only on the bottom part of scenes?

I've been using a Canon PowerShot A1100 IS camera for the past year and it had been working just fine until I decided to change its settings. After I had serious trouble with it, I reset the settings ...
7
votes
5answers
416 views

In which situation should you not use the manual focus?

Couple of weeks back, I discovered the power of manual focus, and now for each and every shot, I use manual focus! Are there some situations where manual focus doesn't make much sense and we should ...
14
votes
1answer
8k views

What do “Frontfocus” and “Backfocus” mean?

I've read those terms in a couple of lens reviews, and not even Wikipedia has an article about it. So my questions are: What is back/frontfocus? What causes back/frontfocus? Is there any preventive ...
1
vote
1answer
240 views

Does autofocus work with the Pentax K10D and Tamron 18-250mm?

Hallo; does autofocus actually work with the Pentax K10D and Tamron 18-250mm? If so,how good/fast is it?
4
votes
4answers
227 views

Doubt about focusing in the lens?

I usually find after blowing out my pic in computer that at one point (where I wished to focus) image is very sharp, then as I inspect the picture I see that some more part of the image either ...
1
vote
2answers
825 views

Why does focusing feel less accurate to me on the Canon 600D than the 60D?

Is there a substantial (or minor) difference in the focusing in 60D and 600D. I tried both in a showroom and felt (I may be wrong) that there was a difference. The focusing I felt was very quick and ...
1
vote
1answer
243 views

Is it possible to improve focus with the Samsung Galaxy S?

Samsung Galaxy S video and photo quality is pretty good but only when fully focused. The focus is getting lost very easly and it become blurred. Are there any ways to increase focus quality and speed? ...
25
votes
6answers
4k views

Can I damage the focus system by turning the focus ring when the lens isn't mounted?

I have a couple lenses that don't have an internal focusing system, and whenever I want to put them back in my bag, I turn the focus ring to make the lens shorter. I noticed that when the lens is set ...
0
votes
2answers
4k views

Best Focus Settings and Methods for DSLR Video?

Camera Body: Canon T2i Lens: Canon EF-S 18-55mm f/3.5-5.6 IS SD Card: Transcend 16GB, Class 10 Stabilization: Handheld/tripod (maybe) Question: I'm going on vacation this weekend and would like to ...
4
votes
2answers
890 views

What is the meaning of having 9 focus points and how to see where they are?

Canon PowerShot SX210 IS is said to have 9 focus points. I haven't seen any setting which shows all those points on the screen or anywhere. How and what are those remaining 8 focus points used for? ...
5
votes
2answers
815 views

Is it possible to Zone Focus with a DSLR?

I have a Canon 1000d. Is the zone focusing technique applicable in a DSLR? If yes, how do we do it?
3
votes
3answers
3k views

How do I take forced perspective photographs with a point & shoot camera?

My teenage son needs to take some forced perspective shots this weekend as part of a camping/hiking trip. He has a Panasonic DMC-FX01 point and shoot camera. He wants to be able to hold up something ...
7
votes
2answers
2k views

How can a prime lens focus on more than one plane?

By definition, a prime lens is a fixed lens system with a fixed focal length. Then, simple physics tells us that it should be able to focus only on one plane (at a fixed distance) in front of it. But ...
17
votes
3answers
1k views

How can I get better focus when a subject is moving towards or away from the camera?

When shooting events or action photos, engaging people, I often find that frontal (or rear) perspective may be very expressive, but my problem is focusing when the subject moves towards the camera (or ...
11
votes
6answers
6k views

How can I get everything in focus?

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, ...
4
votes
4answers
1k views

Why does my Nikon D90 autofocus not work in rapid succession?

When photographing candid shots of my children at play with a Nikon D90, I have trouble with the autofocus system. I focus and shoot one shot, great. But a second later another shot opportunity ...
24
votes
3answers
2k views

Does changing the focal length change focus?

When using manual focus or back focus on D60, I sometimes zoom in the lens, set the focus, and then zoom out. Does changing the focal length (zooming out), also change the focus? In case the answer ...
5
votes
1answer
18k views

What is the difference between Al Focus and Al Servo autofocus modes?

Recently I bought a Canon 60D and I am uncertain about when and how to use/activate the Al Focus and Al Servo functions. I understand the One Shot autofocus function for still subjects. You press ...
7
votes
1answer
2k views

How do you trap focus on DSLRs without native support for it?

I came across the term trap focus on the autofocus page of wikipedia, and it seems to be a very handy feature that triggers the shutter release when a subject moves into the focal plane. This feature ...