Alley in Pisa, Italy

by Lars Kotthoff

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An important aspect of the photographic vocabulary, produced by focus selection, limitations of depth of field, optical qualities, subject motion, camera motion, or other technical problems.

learn more… | top users | synonyms

34
votes
15answers
6k views

How can I maximize the “blurry background, sharp subject” (bokeh) effect?

I know that this effect occurs when there's a shallow depth of field. My question is, what are the various ways I can increase this effect in my photos when I'm taking them? Note that I'm not ...
33
votes
12answers
6k views

How can I take shallow depth of field photos with a point-and-shoot camera?

I have a compact digital camera, and in macro mode I can manage to achieve a blurred background, if the background is far enough away. Can this be done when taking non-macro pictures, and if not, is ...
21
votes
3answers
2k views

Why would one shoot a fully blurred picture?

Focus and blur have a reason in a picture when they come together. Blur alone is just a loss of an important element in the photography art, unless it has a reason, like obscuring nudity or creating ...
17
votes
5answers
1k views

Should I switch off image stabilization when photographing my 2 year old?

A large percentage of my photos of my 2 year old appear to be blurred. I know one of the problems is that she will not sit still for a second, but I am using a fast shutter speed. Could IS be ...
17
votes
2answers
2k views

Why is image stabilisation making images unsharp?

During vacations and travel I tend to use my Nikon D90 and a 18-200 VR (image stabilisation) lens. I was very annoyed (and had no explanation) when I found images to be unsharp, which had be made in ...
17
votes
0answers
2k views

Why does a larger aperture cause more blur of the background? [duplicate]

Possible Duplicate: Technically, why is the out of focus area blurred more when using a bigger aperture? Why is it that a larger lens aperture produces a shorter depth of field, causing the ...
15
votes
3answers
3k views

Can software auto-detect image focus?

I was wondering if there was any photo management software out there that could auto detect and "rate" images on how in focus they are. This comes up for me quite commonly when i am looking through a ...
15
votes
6answers
5k views

How does background blur (bokeh) relate to sensor size?

This is a somewhat theoretical question. Suppose I first take a photo of a subject using a full frame sensor DSLR, with a given lens (say 50mm prime lens at f/3.5). Now suppose I exchange the camera ...
13
votes
1answer
2k views

What's the difference between Bokeh and Gaussian Blur?

I have heard multiple times in photography, the words Bokeh, and Gaussian Blur. To me, it seems that the words are used almost interchangeably, but in some instances, I have heard them contrasted. ...
13
votes
3answers
3k views

What equipment and settings do I use for panning shots of moving objects?

How do you go about getting great panning shots of things like cars and bicycles so that the background is nice and blurred but the target is sharp as can be. I have tried on many occasion to do ...
12
votes
4answers
2k views

Where does the ¹/shutter speed = focal length rule for hand shake come from?

The generally accepted rule of thumb is that the shutter speed must be the same or larger than the inverse of the focal length. As is, it seems that it makes no sense as is: On a 24 Mpixels ...
12
votes
2answers
2k views

How can slightly blurred photos be improved in post processing?

I have heard quotes which say "If its not good, delete it." I go by that advice, but sometimes you capture some precious moment but you see that photo is slightly blurred because of camera shake. I ...
11
votes
8answers
1k views

How can I prevent blurred images when using a tripod?

I'm doing panoramic HDR photography for work using one of those stupid cheap mirror balls mounted on a tripod (not my decision!) and I am noticing on my longer exposures that sometimes I'm getting ...
11
votes
3answers
1k views

How can I repair missed focus in a valuable photo?

The subject in my photo isn't properly focused. I can't take it again because this activity documentation photo can't be redone. I've tried many solutions such as using shadow/highlight in Photoshop, ...
10
votes
3answers
474 views

How can I use image stabilization to make a moving subject clear?

Image stabilizers in digital cameras are available for shooting moving/shaking snapshots clearly. The image stabilizers try to focus the moving object and reduce the shaking. However, I have set the ...
10
votes
2answers
900 views

How to stop a high F number from appearing blurry?

I have been out taking some evening photos (just after sunset) and I have noticed that in a number of instances the higher f numbers ( 14+ ) are appearing more blurred than the lower f numbers ( < ...
10
votes
2answers
2k views

How can I undo an intentional Gaussian blur when I don't have the originals?

I have a bunch of old pictures which I had performed a Gaussian blur on to use in a competition years ago and have now realised I do not own the originals anymore. Does anyone know of a tool out there ...
8
votes
5answers
596 views

Is the bokeh in this picture naturally occurring, or added in post-processing?

Click here for picture I feel like the blur is not natural. Looks like it was Gaussian Blurred with the couple as the center. What do you guys think?
8
votes
2answers
756 views

Why do my photos look like they're painted?

I'm not an expert, but all the photos I take look like they've been painted. It doesn't look like normal blur. I'm using a FinePix S2500HD and the following photo was taken at 1/2000 exposure. I ...
8
votes
2answers
653 views

How can I “focus peak” a photograph?

Does an application exist where I can input an image and then the application indicates what parts of the image are in focus? I imagine it as a sort of post-process focus peaking.
8
votes
5answers
2k views

How to avoid a halo around the edges?

I am just post-processing some pictures I took last spring. On lots of them, I notice a halo around the edges of objects which are slightly outside the focused depth. I shot without a tripod, with ...
7
votes
5answers
4k views

Why are my night photographs always blurry?

I was shooting the lighting of the city that is visible at the top of the trees if you shoot landscape. No matter what I do, the image is blurry. What have i done: ISO 100 Manual focus towards ...
7
votes
5answers
1k views

What are the benefits and costs of an image stabilized, slower lens vs a non-IS faster lens?

I am going thru a trade off decision between a 24-70 f2.8 lens and a 24-105 f4 IS lens from Canon. My dilemma is that the 24-105 focal length better matches my needs, but the f2.8 would occasionally ...
7
votes
7answers
905 views

Does a larger sensor resolution increase the difficulty of shooting hand-held?

I'm thinking of upgrading to a D800 and I think I read something about the 36MP resolution of the sensor to be a liability when hand-holding the camera at lower shutter speeds. Unfortunately I cannot ...
7
votes
2answers
343 views

Real-time vs post-production blurs — what's the difference?

I've always been a huge fan of blurry photos, I guess in part because almost any camera is able to take blurry photos, though some better than others. What's the difference between real-time and ...
6
votes
2answers
3k views

How can I take a photo with everything in focus with my DSLR?

I am quite new to DSLRs and one of the first things I noticed was the incredible focus points and depth that you can achieve. That is great in a lot of scenarios, but not in all. When filming a ...
6
votes
4answers
899 views

Why is my lens only somewhat sharp near the center and very blurry on the edges?

I bought a canon 50-250mm IS lens (for my T1i), maybe two years ago and haven't used it much, but whenever I do, I always regret using it. Pictures are blurry, the depth of field too shallow and so ...
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
885 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 ...
6
votes
5answers
1k views

Would a large aperture lens help against low light subjects being blurry?

I want to get nice shots with ambient light (meaning the natural light in the room of restaurants, living room with x-mas tree lights only...) so I can catch the glow of light on people’s faces as ...
6
votes
1answer
1k views

Which Lensbaby Sweet 35 or Edge 80 effects are harder to reproduce post-processing?

I want some suggestions from Lensbaby users. I have the plastic optic, double glass and fisheye optic. I use the composer. The recent new optics: Sweet 35 and Edge 80 seem very intriguing and I ...
6
votes
1answer
2k views

Is there a theory behind 'Blur Detection'?

I am trying to implement a blur detection algorithm for my imaging pipeline. The blur that I want to detect is both - Camera Shake: Pictures captured using hand which moves/shakes when shutter ...
6
votes
3answers
8k views

How does Photoshop CS6's deblur feature work?

This video shows a sneak peek of a new Photoshop feature for Creative Suite 6, called 'deblur', which is able to take a blurry image and make it sharper: http://www.youtube.com/watch?v=xxjiQoTp864 ...
6
votes
1answer
476 views

Is there a script which will detect camera-shake blur? [closed]

Is there any existing script, either standalone (python, perl, etc.) or bridge/aperture plug-in that will detect blur of the type where you move the camera when taking the picture? I know this can be ...
5
votes
4answers
576 views

How was this blurry background, sharp motorbike effect achieved?

In this photo nominated as Canon Australia Photo of the Week, the background seems to blur while the rider is sharp. Wouldn't this normally be the other way? How was this done?
5
votes
3answers
4k views

Why does my Canon 7D get blurry pictures with a 70-200mm f/2.8 IS (series 1)?

I'm wondering if it's normal for a Canon 7D with its crop sensor to get unsharp pictures with a 70-200mm 2.8? I just bought a used 70-200 and it seems a little bit blurry. Maybe it needs calibration? ...
4
votes
2answers
2k views

Why doesn't the background become blurred when I change the aperture on my Fujifilm S4000?

I am sorry if my question is too naive, but I am a complete beginner in photography, and I think I still need to understand well what aperture is. I have a Fujifilm S4000 camera, and I know I can't do ...
4
votes
2answers
400 views

Why does text in a photograph become blurry when I downscale the image?

Recently I created a website where I sell books. I captured some images with a Canon EOS 550, and then I resized them according to the website space, but when I resized the original picture, then the ...
4
votes
2answers
335 views

What is causing the cyan outline in the building in the background of this image?

I took this picture the other day. It's a JPEG from the Fujifilm X-Pro1. The sky is overexposed as was necessary to light Anya brightly — and because I was playing with shooting wide open, and that ...
4
votes
3answers
163 views

How can I defocus part of an image in-camera separate from depth of field effects?

What physical tools (lenses/filters/etc) can be used to blur a part of an image whilst taking the photo. (I don't mean software filters in post-processing, and I want to blur selective areas ...
3
votes
5answers
638 views

Can a photo with nothing in focus be considered to have bokeh?

This photo was accidentally captured by me. Can it be considered to have bokeh? I am confused, because it does not have any foreground in focus.
3
votes
4answers
508 views

Why is this aerial picture of an airplane in flight not blurry?

So this might be more a physics question but I was wondering why the plane isn't blurry in this satellite photo? I am assuming the its traveling quite fast! ...
3
votes
4answers
20k views

How can I fix an out-of-focus blurred photo in Photoshop?

How can I fix this picture? Somebody else took this picture and well he wasn't able to do it very well, and it's blurred. I have photoshop
3
votes
1answer
255 views

Was the background blur in this image done with a Petzval lens?

I am interested to know how the background blur in this image was done. Is it a petzval lens?
3
votes
2answers
678 views

All my photos were blurry

I recently did a shoot of a baby and my 6 year old son, and I got some fantastic shots that were super sharp. I then did another shoot of a 6 year old and toddler and every single photo was slightly ...
3
votes
1answer
3k views

How do I blur the subjects other than main one in photoshop?

I have some photos in which I have a lot of subjects, but I would like a single person to be the main focus. Now I would like to blur other people and subjects in that photo using Adobe Photoshop. ...
3
votes
1answer
121 views

Human perception in color mixing

Look at this image: 50% of its pixels are blue (0, 0, 255), 50% of its pixels are yellow (255, 255, 0). When I look at my computer display from a distance where I cannot distinguish the ...
2
votes
5answers
2k views

How can I get non-blurry gymnastics pictures with my entry-level DSLR?

I have a Nikon d3100 with 18-55mm and 55-200mm lenses. My issues are the lighting and the shutter speed for fast moving objects. My aperture is set to f/3.5, shutter at 1/1000th of a second, and ISO ...
2
votes
4answers
430 views

What is the best setup for shooting sports at night with a point & shoot camera?

I always try to take good photographs in soccer matches or in races at night, not using flash, and I have always the same result: too much blurred photos. I don't have an SLR, but I'm sure that's not ...
2
votes
4answers
2k views

Blurry pictures when zooming in

I have a 3 month old Nikon D5100. The closer I zoom in, the blurrier the picture. This is on auto. I have two lenses and they are both doing this. Any ideas why?