All Questions
274 questions
0
votes
3
answers
189
views
Why are my landscape photographs muddy and grainy?
I am a beginner and I have been recently trying to do some landscape photography. However what I am not satisfied with is the level of sharpness and muddiness, it feels the photos come out always ...
- 3
0
votes
1
answer
96
views
What are the techniques to sharpening text in colored paper?
I need to sharpen this image:
Using online sharpening tool, this is the best I have:
It doesn't improve much, so I decide to do it manually. Following this tutorial, I use the Sharpen (Unsharp Mask) ...
- 419
5
votes
2
answers
2k
views
What can cause double-vision effect in slightly out of focus areas?
I have an issue with my Canon 70-200 F/4L USM. It is less sharp at 200mm than at shorter range and the objects that are slightly out of focus are rendered twice with horizontal offset. The shutter ...
9
votes
4
answers
2k
views
Under what circumstances does f/22 cause diffraction?
Today I went out to get a photo of a historic building with a lake in front and opted to shoot at f/22 with a tripod. To my surprise, the images aren't sharp. I also used the Olympus high res mode and ...
- 527
2
votes
3
answers
305
views
Why are photos of landscapes taken on a sunny summer day very unsharp despite a rather short (1/40") exposure time?
Last weekend (in mid-September) I took some wide-angle (24 mm APS-C) photos of a landscape in my vicinity. Despite good illumination (the day was quite sunny), a not-too-long exposure time (1/40")...
- 608
0
votes
2
answers
395
views
No flash mode pictures
OK so I'm an absolute beginner when it comes to photography. But here's the thing when I try to Take a picture in the no flash mode in the dark it won't take a picture but if I go into some light ...
0
votes
3
answers
186
views
Canon EF 40mm f2.8 consistently sharp across the frame?
Does the EF 40mm f/2.8 lens give sharpness not just at the center but also to the periphery most of the time..? In comparison with the 50mm f/1.8 STM which only very sharp at the center..?
I have done ...
- 137
1
vote
2
answers
70
views
Compensate aberration to improve the quality of a surveillance camera
I am analyzing the videos recorded by a surveillance camera and noticed that, in most scenes, there is a sort of "halo" around the right part of people passing by (also around the orange ...
- 113
0
votes
2
answers
285
views
Why is my lens sharpness much softer at f/1.2 than higher apertures when taking landscape pictures?
I recently bought a used Canon 50mm f/1.2 L USM and have been noticing that the lens is quite soft at f/1.2 (using a Canon 1DX Mark II, if relevant). Now it's the first time I am shooting at such ...
- 113
35
votes
8
answers
41k
views
Why are my photos not crisp?
I use a Canon EOS Rebel T3i (600D) with the kit lens. I have experimented a lot with different settings and modes, but I feel like I have wasted many good shots that could have looked amazing, if only ...
- 477
-1
votes
1
answer
261
views
Example images of 24.3 MP that have been deemed "Ultimately Sharp"
I am looking for raw images or websites that I can compare my D750 .NEF files to regarding sharpness. I don't have any problems with the camera-lens combos, all fine tuned with Lens Align several ...
69
votes
7
answers
24k
views
What is a "diffraction limit"?
I've seen the term used, but what is a "diffraction limit", when should I worry about it, and what undesirable effects are a result of it ?
- 26.5k
1
vote
5
answers
467
views
Are faster lenses inherently better than alternatives if shooting with same aperture?
Let's suppose there is a faster prime and slower zoom lens which covers the same focal length and I want to shoot landscape scenes with certain fixed aperture to make sure the depth of field is big ...
- 181
0
votes
1
answer
496
views
Can a filter make an image sharper?
A recent social media campaign by Urth, promoting their new magnetic filters, claims to increase sharpness (emphasis my own)
Our professional Ultraviolet Filter Plus+ cuts UV light to make your ...
- 527
7
votes
10
answers
7k
views
Why can't I shoot with a fast shutter speed with my continuous light at max power?
I would like to ensure a sharp focus of my object when shooting overhead (both object and background in focus). However, when shooting in manual at f/8.0 and ISO100 my shutter speed has to be 1/4 for ...
- 81
2
votes
3
answers
714
views
Picture looking sharp in Live View mode, then losing sharpness after picture has being taken
Since recently I am experiencing an issue with the sharpness of my images.
I am using canon 70D with a macro lens for shooting jewellery and I need to have a very clear picture to capture the ...
- 21
11
votes
6
answers
8k
views
Do more megapixels mean sharper images?
Do more megapixels mean sharper images?
Would a 24 MP camera produce a sharper image than an 18 MP one (given the same lens, settings and scene)?
user91798
0
votes
2
answers
81
views
How is reflection sharp when not in DOF range? [duplicate]
This is baffling to me. When you use fast lens and you focus on a subject, you'd think that everything that's not in DOF range would be blurred but this is not the case if the object is a mirror or ...
- 201
7
votes
6
answers
5k
views
Do I really need a US$1500 rig for crisp sharp photos? [duplicate]
I'm getting into photography and got myself a used Canon 1200D with a Tamron 18-200mm lens. And currently under no circumstance I am able to make a perfectly focused sharp and detailed photo. Or at ...
- 181
1
vote
1
answer
666
views
What might cause the center of my image to be less sharp than the edges?
I'm using a Sony A7R IV camera with a 12mm f/2.8 ED AS NCS Fisheye Lens. From the rescharts and MTF information that I've seen of this lens, the center sharpness is much better than near the edges. ...
- 13
3
votes
3
answers
8k
views
How to improve image sharpness on Canon 700D?
I'm currently using a Canon 700D with a few EF-S lenses, I like the Canon system, the looks, feel and ergonomics but I'm not happy with the files I'm getting. Whenever I come across a photo that ...
- 418
3
votes
2
answers
92
views
What is the optimal pixel count on a cropped sensor for Canon 100mm macro USM lens?
While choosing used camera to buy, I was checking some combinations of camera bodies with Canon 100mm macro USM lens at DXOMARK and noticed that sharpness (in perceived megapixels) looks very strange.
...
- 31
26
votes
3
answers
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 ...
0
votes
2
answers
911
views
Sigma 60-600mm is never sharp whatever the aperture
Today I tested my sigma 60-600mm lens and I was really disappointed by the quality of the images produced.
I use a Nikon Z6ii and the FTZ (v1) adapter and everything is fine with my other F-mount ...
- 1
1
vote
1
answer
314
views
How to calculate the optimal distance to photograph details for mobile phone lenses?
Most of the mobile phones I've owned have a primary, wide angle camera lens somewhere around 28mm. If I wanted to capture the most details/sharpness (the most pixels) and ignored perspective and ...
- 793
7
votes
5
answers
6k
views
Do cheap filters have an effect on image quality?
Do cheap lens filters (UV, ND, CPL) affect image quality, color reproduction, sharpness, etc.? Do they really offer protection?
- 353
3
votes
2
answers
421
views
How to calculate MTF ? Need help with the formula
I'm trying to reproduce MTF chart programmatically but I'm stuck at some point.
I'm starting with a clean bar chart like this:
I then take a picture of this pattern with a smartphone (printed on HD ...
- 151
8
votes
4
answers
3k
views
Why is Nikon 1.4g better when Nikon 1.8g is sharper?
I am new to photography (just 3 to 4 months of experience) and I am looking to buy a new lens (either 35mm or 50mm, but mostly 35mm because I have already decided Sigma 85mm f/1.4 DG HSM Art Lens for ...
- 577
4
votes
3
answers
420
views
How can I get rid of shadows generated from light source behind object of interest?
I am work in research and I have a areascan basler camera and objective that I am using to track the deformation of an object under load. I have attached an example image shown below.
I am looking ...
- 141
41
votes
8
answers
28k
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 ...
- 513
9
votes
2
answers
2k
views
What makes the difference on partially and fully visible moon?
While I'm satisfied (despite the fringe) with shoots from a partially visible moon with a cheap 500 mm lens:
1/100 ISO 100 f/?
I cannot understand why the image quality is extremely diminished when ...
- 527
6
votes
2
answers
907
views
Why am I sometimes having "doubled image" and soft photos with my Tamron 100-400mm
I sometimes get unsharp results out of my Tamron 100-400mm F/4.5-6.3 Di VC USD, with a "doubled image effect", especially visible in the out-of-focus area (bokeh).
But the rest of the time, ...
- 121
31
votes
5
answers
42k
views
How can I determine the minimum shutter speed to avoid blur from camera shake?
How can I determine the minimum shutter speed at which I can effectively avoid camera shake while hand-holding the camera?
- 23.7k
9
votes
3
answers
600
views
Can using a high resolution sensor and downsampling compensate for a soft lens?
In this question Does super-sampling produce good results? the difference in quality between using a high and low resolution sensor of the same size and then downsampling the high resolution one gives ...
- 1,611
3
votes
2
answers
905
views
Why can I not shoot as sharp as I see on live preview?
I am trying to photograph a piece of jewelry. I have a Canon EO 90D camera with EFS 18-135 lens. I am using a lightbox and a tripod with plenty of light. I zoom to 106mm. I manual focus to get a super ...
- 33
2
votes
3
answers
786
views
Slow shutter speed and image sharpness
I'm new to photography, I hope I won't misuse any terms here.
Let say I shoot a still subject like a product on a tripod with controlled lighting.
Let say I have little light and so I use a slow ...
- 123
1
vote
2
answers
1k
views
Why are my new camera's photos coming out blurrier than my iPhone's when I look at them zoomed in?
I am a beginner at photography and recently got a camera (Nikon D5600). I watched a few videos on how to use it but I am still finding it difficult to operate. I have several questions but the main ...
- 11
40
votes
5
answers
8k
views
Focus problem vs. motion blur vs. camera shake - how to tell the difference?
I'm not sure if the title of the question captures what I mean, but it's hard to be succint in the space allowed.
Suppose you have a picture that is not as sharp as you think it should/could be. (...
- 5,095
27
votes
10
answers
11k
views
How much "noise" is acceptable in a photograph?
I've been at photography for a little over a year, and I primarily do landscape and wildlife/bird photography. Most of my work has been a learning experience so far, with few shots actually something ...
- 70.8k
-1
votes
1
answer
282
views
Is the Sony A6400 weaker than the Pixel 4a?
I've just bought a returnable Sony A6400. I've taken some shots with it, and the same shots with my Pixel 4a. (Static subject; lighting not bright, but nowhere near night mode.) A6400 set to JPEG ...
- 47
10
votes
8
answers
36k
views
Why am I having trouble getting sharp results with my new DSLR, compared to a point and shoot?
I'm having issues with my new Nikon D3200. I am new at photography, but I've previously used my parents camera (a Canon) for my brother's senior photos, and those were crystal clear.
I've got this ...
- 101
2
votes
6
answers
665
views
How to get sharper photos with a kit lens when in low light conditions?
I took my new Nikon D7500 out yesterday and its my first DSLR. I would like to get some thoughts on shooting sharp photos in low light conditions with it.
I was shooting after sunset but before ...
- 121
3
votes
4
answers
5k
views
Why my DSLR is not as sharp as my smart phone?
I recently bought a Nikon D5500 camera with two lenses: 18-140mm f/3.5-5.6G ED VR and 50mm f/1.8G. When I compare the results with my advance smart phone (Samsung Galaxy Note 5), the sharpness is not ...
- 211
1
vote
1
answer
421
views
Why won't my Canon 400D/XTi turn on/off properly?
My camera is a Canon 400D (digital rebel XTi). It sat on a shelf for quite some time.
When I insert a (newly charged) battery, the camera doesn't switch on. I get this screen:
and switching the ...
- 11
13
votes
3
answers
91k
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 ...
- 343
1
vote
0
answers
98
views
AF not working on Manual mode AV or TV mode, and shutter not opening. however both AF and shutter opening on auto and not flash -EOS400d
I am testing an old EOS 400d to see if its worth using-
on auto mode and no flash mode- the camera focuses, I get the green light then it takes the photo once I fully press the trigger button,
in all ...
- 11
30
votes
3
answers
6k
views
With all other things equal, in a DSLR, will a larger sensor produce a sharper image?
I asked a question a while ago here about the "sweet spot" of a lens, which led to a really interesting discussion of "sharpness", the physics of light, and general image quality.
1st Question
In ...
- 1,919
7
votes
6
answers
23k
views
Does the Nikon 35-70mm really equal the newer 24-70mm in image quality and sharpness?
I am planning to buy a AF-S NIKKOR 24-70mm f/2.8G ED, but I saw a second hand 35-70 f/2.8 AF in a store nearby. I did some research and I stumbled upon Ken Rockwell's 35-70 review, in which he states:
...
- 1,609
7
votes
5
answers
2k
views
Can you determine if focus is sharp without diopter adjustment if your sight is imperfect?
I've already encountered this question about wearing glasses as a photographer. A more specific question I have is as follows. If your eyesight is not perfect, or your glasses and/or contact lenses ...
- 931
5
votes
1
answer
1k
views
Why won't Canon EOS 400D turn on?
I have the Canon EOS 400D - also known as EOS Digital Rebel XTi, or Kiss Digital X in Japan - and as of tonight, it stopped working. It won't do anything, with or without batteries or a CF card, ...
- 51
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