52
votes
Why isn't this portrait taken at f/29 sharp?
You've run over the diffraction limit. Light rays passing through a small hole will diverge and interfere with each other and a pattern emerges--a sort of banding where different frequencies/placement ...
- 50.7k
49
votes
Accepted
Why isn't this portrait taken at f/29 sharp?
As mentioned in the other answers, diffraction has led to unsharpness. To put this to the test, one can attempt to sharpen the image using deconvolution by using the point spread function that ...
- 3,586
40
votes
Accepted
Can you tell from a blurry photo if focus was too close or too far?
It depends. In many cases, it may actually be possible without any further visual aids in the picture.
Many lenses, if not most, will show different longitudinal chromatic aberration in front of and ...
- 2,883
35
votes
Accepted
Orange “aura” around people/objects in photo, usually present with older cameras?
Actually, this is intentionally done and can be duplicated with any camera and flash combo (ish).
To me, the second and third image seem indicative of a technique known as second curtain / rear ...
- 20.5k
26
votes
How to have a sharp product image?
shutter speed 0.5 seconds
This is likely to be a bit of your problem. The shutter causes vibration of the camera. So, too, does your hand pushing the release button.
At faster speeds, this ...
- 20.5k
21
votes
Can you tell from a blurry photo if focus was too close or too far?
When the aperture is positioned to minimize vignetting, the bokeh shapes for objects that are too far is rotated by 180° compared with objects that are too near. (The aperture image is reflected ...
- 251
20
votes
Orange “aura” around people/objects in photo, usually present with older cameras?
The blur is caused by the shutter being open for much longer than the duration of your flash.
The orange color of the blur is due to the ambient lighting being much warmer in color than the light ...
- 173k
18
votes
Accepted
Blurred photos of a moving subject under low light conditions
Use more light. Open windows, turn on more room lights, bring in extra portable lights.
Use a flash. You say there is "no chance" to use a flash, but since you gave no justification for that it ...
- 17.4k
17
votes
Accepted
What is a likely cause of this glow in my photos?
You appear to be using your lens (100-400/5-6.3) with the aperture wide open. I would expect the glow in your photos to be significantly reduced or absent stopped down to about F8.
Many lenses "glow"...
- 26.8k
16
votes
Why isn't this portrait taken at f/29 sharp?
Because of diffraction. f/29 is way too much for you to expect a sharp image. Try shooting the same thing at f/8 and you'll see the difference.
- 2,034
16
votes
How can I reproduce a myopic effect on a picture?
I don't know how a myopic person sees, but an effect similar to that of the paintings described in the comment can be achieved with Photoshop.
Starting from this image:
Duplicate the layer
Change the ...
- 1,457
14
votes
Why do moving objects in photos appear blurry?
First, I'll talk about what cameras do normally, then about how motion affects this operation.
In order for an image to be sharp and in focus, all light coming from a single point on the object being ...
- 241
12
votes
What is a likely cause of this glow in my photos?
The fact you're seeing this with two very different bodies suggests to me it's in the lens. Long zooms tend to have a bunch of elements (anywhere from a dozen to twenty, in my experience). No lens ...
- 7,032
11
votes
Accepted
Maximizing bokeh in the foreground?
From the other question:
Here's the list of things that influence depth of field the most (in
this particular order):
Subject distance, the closer the subject is, the shallower the DOF
(think of ...
- 549
11
votes
How can I reproduce a myopic effect on a picture?
Myopia means that our eyes can't focus anything further away than a few centimeters. As Tetsujin already said, it's difficult (if not impossible) to reproduce that in post-processing. It should be ...
- 764
9
votes
How to focus on an area correctly, while still blurring everything else?
The short version is you need not the "biggest aperture possible" but the right aperture given the distance and desired depth of field.
There are a number of online depth of field calculators ...
- 2,328
9
votes
Blurred photos of a moving subject under low light conditions
From the information provided in your comments, it sounds very much like the shutter speed was too low, possibly because your ISO was too low and the subject was moving faster then the shutter, hence ...
- 4,864
9
votes
Defective Black Eye Macro 64
A diopter lens* like this is really only supposed to work at VERY close distances, which your unmodified phone or camera lens won't focus to (otherwise, there is no need to use a diopter). From the ...
- 7,162
8
votes
Why is my picture blurry?
All in all for the shutter time and subject matter you did very well to get a photo as clean as you did.
Here are the causes of the imperfections you notice in your photo:
The people in the photo ...
- 173k
8
votes
Accepted
Why is my picture blurry?
... I thought it could have been caused by either poor lens quality, bad auto-focus, or motion blur, or is it perhaps something else?
If the problem is motion blur, you typically see a slight double-...
- 50.7k
8
votes
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?
Yes, this precisely what Photoshop CC's Shake Reduction filter does. Adobe first publicly demonstrated their prototype feature at Adobe Max 2011. The crowd was pretty wowed by the demo. While it was ...
- 31.7k
8
votes
How to have a sharp product image?
It appears your aperture is still too open for the subject to be entirely in focus, at the current distance between the lens and the subject.
You could tackle this issue in three ways:
1) Close down ...
- 2,704
8
votes
How can I reproduce a myopic effect on a picture?
I'm not good at the maths on this kind of stuff… but if myopia is light focussing before the retina [which makes it relatively easy to focus on close objects but not those farther away], then wouldn't ...
- 22.1k
7
votes
What exactly is the cause for the diffusion of bright objects in these image?
The reason the background is not dark is because there is light shining on it. The same light sources that you are attempting to record directly are also illuminating the areas around the light and ...
- 173k
7
votes
Blurred photos of a moving subject under low light conditions
I’m using a bridge camera Fujifilm s7000.
This is the root of your problem. The S7000 was announced in 2003, and discontinued in 2005. And while the camera might work just as well as it ever did, ...
- 31.6k
7
votes
Accepted
Why is there a purple blur around fire in photos?
I've run into that when taking pictures of Raku ceramics in and just out of the kiln. I think it's a heavy dose of near IR overwhelming (or at least leaking through) the camera's IR blocking filter. ...
- 6,514
7
votes
Can you tell from a blurry photo if focus was too close or too far?
My answer only deals with "human" ways in differentiation - that is: No software, only your eyes and hands.
If I have no reference (as in: you blind me, you set the focus distance, and then I can ...
- 6,467
7
votes
How to have a sharp product image?
Based on the article posted here, it seems that this lens sharpness does not increase with aperture size reduction:
https://www.imaging-resource.com/lenses/sony/e-16-50mm-f3.5-5.6-pz-oss-selp1650/...
- 234
7
votes
I took one picture and my camera says memory full. Why does it say that?
This camera requires an SD Card. You need to purchase a Secure Digital Memeory card and install this in the Camera. It may already have one installed. The SD card is the device that records and ...
- 38k
Only top scored, non community-wiki answers of a minimum length are eligible