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
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 ...
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
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
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
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 ...
-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 ...
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
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
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
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
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
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
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
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
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
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
2
votes
1
answer
218
views
Canon 40D ERR 01 lens error on manual only- is hope for the lens lost?
I am a high school teacher working with a donated canon 40D to loan to students for projects.
A student wants to shoot manual mode on the camera, but the lens (Canon Ultrasonic EFS 17-85 mm) won't ...
-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
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
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
2
votes
0
answers
121
views
How to technically measure sharpness?
I'm trying to measure sharpness through a script in order to measure sharpness across different devices.
My methodology:
I have a pattern with pure white and black stripes like this:
I use HD ...
- 151
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
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
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
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
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
1
vote
1
answer
1k
views
Picture gets blurry when zooming in
My Nikon 3400's kit lens(18-55mm) works fine when I take pictures at 18mm. But when I extend lens beyond that, the picture gets blurry(no clarity). Though I can focus on extremely close distances ...
- 11
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
3
votes
1
answer
257
views
Need some help with astro photography
I'm just getting into photography and I'm interested in landscape, astro and macro photography.
Because of the comet C/2020 F3 (NEOWISE), I tried to make some pictures during the night, but I think ...
- 33
1
vote
1
answer
1k
views
What does make a vintage lens not sharp and can we fix it?
Situation
I have this Takumar 200mm lens mounted on a Canon 60D with an m42 adapter. I really like the lens because of the bokeh it creates but the photos are so soft. I tried all the f numbers from 3....
- 259
1
vote
2
answers
142
views
Reduce image sharpness and DPI [closed]
Why does the sharpness of the imag decrease when I increase the DPI of an image?
- 71
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
3
votes
2
answers
199
views
How to proper focus for sharper images?
For shooting landscape photos, what is better using manual focus or automatic focus?
I seen a lot of people who focus with automatic focus then switch to manual focus, is this so the focus doesn't ...
user91798
1
vote
2
answers
163
views
Different focus on different parts of the picture
I have a problem with the camera on my Xiaomi Mi A2. It mainly occurs when I take pictures of things far away. This problem is consistent. I have added a few pictures. You can see in one of the ...
0
votes
1
answer
250
views
Sony A6000 with Sony E 18-200 lens: images unsharp on the left, in particular at zoom — lens damage?
My photos, taken with a Sony A6000 with a Sony E 18–200 mm lens, are unsharp on the left at moderate zoom and unsharp everywhere off-centre in severe zoom. This effect is present with image ...
- 1,510
1
vote
1
answer
118
views
What is the optical problems in these test images and what causes them?
As I was recommended in the question How to determine which lenses are good at testing teleconverter quality? I was taking test pictures trying to determine lens/teleconverter quality. No I did not ...
- 1,611
2
votes
4
answers
313
views
Images Unsharp Or My Criteria Needs To Be Adjusted [duplicate]
I have Nikon D3500 with kit lens 18-55 VR and some other lenses af-p 10-20 among them.
As I renewed my interest for photography some time ago, I have some images at the LR scrutiny that were taken ...
- 89
1
vote
2
answers
1k
views
Settings to improve dull images
I am using Nikon D5600 with 18-55 mm kit lens. When I take photos of open fields or other landscapes, the color combination comes out dull. I compared it with Canon 1500D photos. Photos from Canon are ...
- 319
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
0
votes
1
answer
298
views
Optically reduce chromatic aberration - is it worth trying?
I have been using this Tamron SP 180mm 1:1 Macro - F/32 lens to digitize 35mm slides. Unfortunately, the lens' chromatic aberration is quite noticeable, when used at 1:1.
I have plenty of strobe light ...
- 131
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
4
votes
2
answers
629
views
Will a Nikon D810 give me more fine detail than a D610 for macro enlarged shots?
I do a lot of photography that focuses on tiny details usually with marine animals such as coral. I am in need of a camera that produces a photo, that even when enlarged from a macro point, it retains ...
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
3
answers
515
views
Is it better to shoot at diffraction limited aperture or sharpest lens aperture?
In the old cameras like Nikon D80 with 10 Megapixel pixel count. The diffraction limited aperture is F/13 but its known that lenses are generally sharpest at the F/8 so it's a no brainer to shoot at F/...
- 2,019
0
votes
1
answer
1k
views
Why are my picture not as sharp when shot RAW as when saved as JPEG [duplicate]
Newbie question here.
I shot an image in low light in jpeg format and it's crisp, but when I shoot raw in plain day at 1/125, my image looks blurry most of the time. Unless I max out the sharpness ...
1
vote
3
answers
301
views
What affects tripod stability?
I have a Vanguard Veo 2 265 CB tripod. I really like it and it has been performing, but lately I am trying to get my pictures as sharp as I can get and I noticed something. It must be trivial to ask,...
- 125
0
votes
3
answers
882
views
Tamron 100-400 (Canon EF) sharpness
I'm puzzled by how the results that "The Digital Picture" have received while testing the new Tamron 100-400 telephoto zoom lens contrast the positive reviews by the actual users all over the Internet....
- 125
1
vote
2
answers
234
views
Why does grain increase acutance?
The Wikipedia article on acutance claims that a slight amount of noise or grain can increase acutance. Cambridge in Color gives the following demonstration.
No noise:
With noise, with more acutance:
...
- 131
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