Questions tagged [blur]

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.

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46
votes
20answers
17k 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 ...
43
votes
8answers
8k views

Can you tell from a blurry photo if focus was too close or too far?

If you focus on a focal plane that is sufficiently in front of your subject, or past it (relative to depth of field), the subject will appear blurry. Is there some way of telling purely from the ...
36
votes
12answers
16k 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 ...
27
votes
2answers
23k 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. ...
25
votes
3answers
6k views

Why isn't this portrait taken at f/29 sharp?

I am confused as to why this picture is not sharp. This is a portrait shot at F/29 ISO100 1/250 with a 17-85mm lens focused at 38mm. The subject distance was 1.2M. My DOF app tells me that my DOF ...
23
votes
3answers
9k 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 ...
21
votes
3answers
6k views

Orange “aura” around people/objects in photo, usually present with older cameras? [duplicate]

I’m not sure if this is the right place to ask but I’ve been unable to figure out what exactly this is. It’s an effect, seemingly unintentional, that makes people and things have orange blurs around ...
21
votes
3answers
5k 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 ...
20
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7answers
12k 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 ...
20
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7answers
10k 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 ...
18
votes
2answers
5k 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 ...
18
votes
2answers
32k 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 ...
17
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5answers
2k 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
3answers
5k 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 ...
17
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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 ...
16
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5answers
5k 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 full-...
13
votes
9answers
4k 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 ...
13
votes
3answers
9k 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, ...
12
votes
3answers
84k 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 appearance of depth that you can achieve. That is great in a lot of scenarios, but not in all. When ...
12
votes
4answers
124k 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
11
votes
11answers
5k views

How to have a sharp product image?

I am trying to get my images sharp, but I always notice there are some blurry edges that are further from the lens. I basically set my ISO to 100 and tried to work my way from there. Since I was ...
10
votes
5answers
889 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?
10
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3answers
2k 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
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6answers
6k views

Why do moving objects in photos appear blurry?

When taking a photo on most cameras, if you take a picture of a moving object, the object appears blurry. Why does this happen exactly?
10
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2answers
3k 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 ...
10
votes
2answers
5k 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
6answers
82k views

Is it possible to re-focus (recover) an intentionally blurred image?

I have an image which I have modified through Picasa ( using Soft Focus - essentially I am making the faces blurred ). Question is : If I upload that photo to Facebook, and a user downloads it from ...
10
votes
2answers
2k 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.
9
votes
5answers
18k 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 ...
9
votes
5answers
4k views

What is a likely cause of this glow in my photos?

I have been using a Nikon D5200 with a Tamron 100-400 zoom for wildlife photography. It's admittedly a budget setup (in some sense of the term "budget"), so I don't expect amazing results. I'm also ...
9
votes
6answers
8k 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 ...
9
votes
2answers
902 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 post-...
8
votes
8answers
3k 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 ...
8
votes
3answers
13k 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? ...
8
votes
1answer
923 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 ...
7
votes
5answers
2k 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
5answers
2k 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 ...
7
votes
4answers
1k 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?
7
votes
5answers
2k 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 ...
7
votes
5answers
911 views

Maximizing bokeh in the foreground?

Another question asks, How can I maximize the “blurry background, sharp subject” (bokeh) effect? Rather than the background, I am interested in blurring the foreground. What techniques or advice are ...
7
votes
3answers
22k 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
5answers
11k 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 on....
6
votes
3answers
1k 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
1answer
3k 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
3k 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 speed ...
5
votes
5answers
3k views

Blurred photos of a moving subject under low light conditions

I’m using a bridge camera Fujifilm s7000. I’ve found it difficult to take photos indoors in low light conditions. The exposure looks right but blurred. I’m trying to take photos of our baby, as you ...
5
votes
1answer
94 views

In an image with camera shake and a point light source, can the shape of the point light source be used to practically reduce the shake significantly?

Often said "you could compute out the camera shake if you knew the blur function"... One area frequently plagued by shake: Night photography. One thing frequently found in night photography: Stars ...
5
votes
3answers
316 views

What exactly is the cause for the diffusion of bright objects in these image?

What exactly is the cause for the diffusion of LED chips in the image below? We can see clearly the LED chips in the image. However, between LED chips, the background is not dark but there are some ...
5
votes
1answer
119 views

Are focus and resolving power optically equivalent?

Limited "resolving power" or "sharpness" is a problem one can see with many lower-quality lenses, especially with higher-resolution camera bodies. Playing with my cheap 500mm mirror lens, I often get ...
5
votes
2answers
368 views

What is this odd brushstroke-like blur with my Canon EF 100-400mm f/4.5-5.6 L IS II?

I am shooting a lot of low light sports up in the north and I have noticed a lot of back focusing issues that I mostly blamed on myself with a 5D Mark IV and EF 100-400mm f/4.5-5.6 L IS II. But ...