All Questions
26,481
questions
1
vote
4
answers
128
views
What is the definition of focal length for a camera lens?
I came across many articles where the focal length of a camera lens is defined as the distance between the optical centre of the lens and the sensor. One such article is here:
https://photographylife....
- 177
0
votes
0
answers
17
views
RAWTherapee on Windows10 Migration from RT5.8 to RT5.9
The .pp3 profiles created on RT5.8 do not give the same result (JPEG) on RT5.9 (especially for negative films but also for digital)
How can I solve this problem?
Should I use the 2 versions in ...
- 1
2
votes
4
answers
578
views
How to remove paper sticker on negatives?
I have a lot of old family negatives from the 80s and 90s that have a strip of paper thoroughly stuck to the top. Why was this done, and is there a safe way to remove it?
- 51
0
votes
1
answer
53
views
darktable 4.0, favorites category missing?
Upgraded my OSs (FreeBSD and Ubuntu) and apps, now running darktable 4.0.
In darkroom, the only tabs I see on the right now are
quick-access
active
technical
grading
effects
Is there a way to get the ...
- 35
2
votes
1
answer
44
views
Lightroom CC v5 - How to select flagged photos
I had no problems with this when I used Lightroom Classic but in cc I cannot figure out this simple task. I cannot find it in the menu system.
When google I only find the classic way.
Can someone nice ...
- 139
0
votes
0
answers
39
views
Why am I losing the color profile when GIMP invokes Darktable?
When gimp 2.10.32 opens a raw file using darktable 4.0.1 via the plugins/file-darktable/file-darktable plugin, my image has the color profile assigned to it that I want. (I have a preset for the ...
- 35
8
votes
8
answers
4k
views
Is the film still useable if the back of the camera opens while you're still on 0 shots and have just loaded in the film?
I have just loaded in a 35mm film to my camera (basic Canon point and shoot) but the back accidentally opened. I haven't taken any pictures yet, is the rest of the film okay because it made that noise ...
- 89
0
votes
2
answers
115
views
I want to measure far distance focus in a short space, but give myself a greater FOV, how would I do that?
Building off of this question, say I put a 1 m lens in front of a camera so I can see a virtual image at 500 m to focus to, when I place an object within the focal length (0.998 m), but I want a ...
1
vote
1
answer
75
views
What's the best way to approximate '4k' resolution from a security camera?
Odd question I know. I am considering getting a 4K Home Security Camera. I want to know how it will see my yard, so I took a photo where I will mount it using my phone. (Pixel 6a, focal 2.2 ...
- 11
0
votes
0
answers
77
views
Why do I have poor image quality on my Sony a99 at high iso?
I've just purchased a Sony A99, the first version, and I'm disappointed to find the photos are very noisy at high ISO, even as low as 800 or 1000. Is this typical for this camera? Is there a way to ...
- 1
1
vote
0
answers
67
views
Sony E-Mount Lens on C or CS mount Arducam (HQ) - Can I find or make an adapter?
I purchased the Arducam HQ, 16MP camera, bundled with a 3MP 6-50mm C mount lens (including the CS adapter)
From close I am very happy with the quality, 50cm away looks exactly as I expected. But when ...
0
votes
2
answers
103
views
How can I make my editing better so I can achieve this editing style?
I am a beginner at editing and practicing by trying to imitate some editing styles I like.
My progress is I pick a picture with editing that I like, next step I start with analyzing it, for example, I ...
- 1
1
vote
2
answers
71
views
Is a diopter recommended for a 56mm lens?
I have a Sigma 56mm f/1.4 and Sony a6400.
I'm looking into buying a diopter because it seems to be relatively cheap and can reduce the minimum focus distance while also zooming in, which I both want.
...
- 11
0
votes
2
answers
45
views
noise in the intensity values has standard deviation of 2 gray levels -- what does that mean?
I am working on digital image correlation and want to figure out the noise in my data.
In a book, I read "many digital cameras record intensity values using 8 bits with Gaussian noise in the ...
- 3
6
votes
2
answers
1k
views
35mm development issues: Only half of film developed correctly
Hello everyone,
I am having an issue developing film - I've never seen this problem before and am not sure what is happening (it has been a while since we've done this). The one side of the film ...
- 61
0
votes
1
answer
59
views
Edits to images shared in Google Photos
Is there any way to force propagation of changes to an image in Google Photos after it has been shared using partner sharing?
I recently uploaded a bunch of photos from a slide scanner. Google Photos ...
- 1
0
votes
2
answers
125
views
I want to focus at far distances but close, what lens could I use?
I want to be able to set the focus at far distances, like 500 m, but in a smaller setting, like 5 m. What lens could I use to achieve this?
I have found this lens that achieves it for a FOV of 120 ...
1
vote
1
answer
180
views
What can I do to improve my blurry indoor hockey photos?
I’m an amateur and just starting shooting my grandsons hockey. I’m using Nikon 18-300 f3.5 lens. My settings were 1/1000 f9 iso 5000 as it’s dark inside. Focus mode AF-C and dynamic area mode. The ...
- 11
3
votes
4
answers
147
views
Tool for finding original RAW files to already organized jpeg files
Problem description
Hi photography community,
as a hobby photographer I organize quite a lot of photos for my family and friends. I have a lightroom library of around 90k photos that accumulated over ...
- 163
1
vote
2
answers
181
views
What options do I have to scan negatives if my scanner is not backlit?
I have been messing around with developing negatives myself and want to scan them but I don't have a backlit scanner. I don't have a lot of money currently but have some options that might work for ...
- 11
1
vote
2
answers
94
views
How to highlight an area of this photo by its color?
I have no knowledge at all of image editing and analysis, so I beg your help.
I have a photo from which I want to highlight the brownest layer, indicated in the red rectangle. This is important ...
-1
votes
2
answers
199
views
Is Adobe Creative Cloud notoriously slow? [closed]
I'm new to this community and am very happy to find it. I'm really not a pro and have to start off with a probably ignorant question:
I'm currently trying Lightroom for free and am now syncing 22 ...
4
votes
2
answers
296
views
What is the source of color noise?
Many articles mention color (chroma) noise. However, I cannot find proper information what is the cause of this kind of noise.
It looks quite different than the luminance noise, so for this reason I ...
- 43
3
votes
2
answers
225
views
How to convincingly add color to jet black eyes
Where I'm from, a large fraction of the population have jet/pitch black eyes with no "texture" to them, or a very dark brown.
In cosplay photography (my field), models would simulate ...
- 143
1
vote
1
answer
89
views
Cutting roll media from epson p900
I have an Epson Surecolor P900 (SC-P900) with the roll media adapter. I am able to use it as expected, everything is coming out satisfactory, but I am having trouble cutting the paper in a straight ...
42
votes
1
answer
7k
views
Why can't I see any images on the roll of film that I've removed from my camera?
I am very new to photography. I bought a Zenit 12xp and color film for it. I loaded the film in the camera but I can't take any photos. When I take a picture and remove the film and hold it up to the ...
- 531
0
votes
0
answers
81
views
Intended brightness setting for sRGB?
This is more of a general question about whether there is an intended brightness setting for viewing the full sRGB gamut on a screen, but my device specifically is a Samsung Galaxy Tab S6 Lite, and ...
- 13
0
votes
1
answer
53
views
How to transfer from Fujifilm FinePix?
I have a Fujifilm FinePix AX550
How do I transfer the pictures to my computer ? The computer is a Linux laptop desktop running Debian. When I connect the camera to the computer, the camera ...
- 105
1
vote
2
answers
63
views
What is the relationship between hot shoe output synchronization speed and shutter speed?
The problem is:
We have a mapping camera which a hot shoe output synchronization speed of 1/250 and during data acquisition its shutter speed is 1/1000, which is very fast compared to the ...
- 11
0
votes
2
answers
103
views
How can I restore details of jewelry in old photo?
I have an old photo that has a family vintage ring on it. The ring is blurred and its details are not visible. I have no experience with photoshop and image processing and have no clue if it's even ...
- 1
5
votes
2
answers
266
views
What does an 85mm prime offer that a 50mm does not?
Putting taste/preference/opinion aside, I wonder whether I'm missing something, either on the technical side or the artistic side.
My question only addresses the context of digital cameras with "...
- 207
0
votes
2
answers
110
views
Why doesn't film advance stop knob stop after the next frame?
I bought an old 35mm film camera online. I loaded the film, turned the knob that advanced the film. Looking at the dial on top, as I turned the knob, it turned past one, went to two, went to three, ...
0
votes
1
answer
58
views
Should individual participant portraits and event photography services be considered separate invoices?
I recently worked with a dance studio taking individual & group dance portraits for their students and also shooting photo & video for their recital. We agreed to sell photo products to the ...
0
votes
1
answer
106
views
Any fix for overexposed shot JPEG Canon Rebel T3i
I recently was on a trip with a loaner Canon Rebel T3i and although I intended to use landscape settings, wearing it around my neck I think it may have jostled it into manual mode. I've been reading ...
- 3
-1
votes
1
answer
133
views
Could I have destroyed my Lumix GX80 by taking sun photos?
So I shooted architecture photos during a cloudy day but the lighting was very bright and you could see sun directly in some moments. I was shooting and I noticed that I needed to adjust aperture (...
0
votes
0
answers
18
views
Issue in file selecting to stack in Registax5
I have taken 1998 images of sun using a neural density filter. I preprocessed the images using PIPP and got a list of cropped images which were arranged in order of their quality. But then when I try ...
0
votes
2
answers
83
views
Canon AV-1: What is 'backlight compensation' and when should I use it?
As a complete noob to photography, I'm struggling to understand what the 'Backlight Compensation' button is for on my Canon AV-1 and under what circumstances I should/would use this setting? I can ...
- 103
1
vote
2
answers
68
views
Why does Jhead with the -autorot option fail to fix my photos' orientation?
I have a lot of photos taken with an iPhone SE that are not displayed in the correct orientation when I view them using the Windows Photos app, XnView MP, or FastStone Image Viewer. I never modified ...
- 607
0
votes
0
answers
19
views
Does PortKey LEYE viewfinder work with Canon 6D M2?
When recording video, especially with a 600mm lens, it is very hard to find the subject in the screen while using viewfinder is much easier as you can point your head and search the area easily to ...
- 259
2
votes
1
answer
179
views
How to achieve this "faded" "magazine-like" effect?
I really like the effect that this photo has but i don't know how to achieve it. Probably done with photoshop? It almost looks like it belongs on an old magazine.
The effect is kind of over exposed ...
- 23
0
votes
1
answer
52
views
How to calibrate my monitors and colorspaces to to best create a workflow or editing raw photos for uploading and viewing on the web
Question 1:
I have bought 2 monitors-4K ADOBE RGB and 4K SRGB. What/how should I set up the monitors' calibrations and color spaces to best edit my raw photos for exporting to the web?
Question 2:
I ...
- 1
0
votes
1
answer
71
views
How can I trigger a Yongnuo YN565EX II off-camera with my Canon 550D/T2i?
I want to upgrade my portrait photography using an artificial light that can function without being connected to the power.
As for now I want to buy only one source of light.
I thought to use my ...
- 1
0
votes
4
answers
216
views
Which is the cause of Barrel and Pincushion distortion?
Barrel and Pincushion distortion are due to the fact that the magnification of the lens changes as you get further off axis.
Let's consider a single thin lens with an aperture stop. These two pictures ...
- 504
0
votes
3
answers
105
views
Taking pictures of moving objects in low light indoor settings without shake. Canon Rebel T7
I'm sort of new to photography and have been successful taking great photos during the day with good light. But anytime that I am indoors/outdoors with low light I can't seem to keep the image in my ...
- 1
1
vote
2
answers
88
views
How should I remove a patch of colour-cast?
The photo below has a distinct patch of purplish colour, in the area within the yellow oval. It's a shame because I like the picture. I think it must have been caused by low morning sunlight catching ...
- 977
0
votes
1
answer
82
views
SIGMA fp intermittently not recognizing SSD connected via USB-C port
To rule out the obvious suspects:
The SSD is right. Samsung T5, recorded a lot of 12bit 4K CinemaDNG with this very camera on it.
The cable performance is right. Not the original T5 cable—I lost it ...
- 123
0
votes
3
answers
79
views
What is it called when a short vs tall object gets distorted when it moved towards the edge of the image?
If I have a camera pointing "straight" down towards a table and put a pack of gum on the table, it will look the same no matter where I move the pack of gum in the image.
If I put a bottle ...
0
votes
1
answer
68
views
Why does my photo have red and green patches on it?
I am new to photography, so I ran into a problem when trying to edit a photo in Rawtherapee where my picture looks like it has red and green blotches all over it. I took this photo with ProShot on my ...
- 1
-1
votes
1
answer
224
views
Which Canon 2X teleconverter model for 70-200 f2.8 L IS II USM lens?
I recently acquired a Canon 70-200 f2.8L IS II USM lens and want to add a 2X extender. According to Canon, the newest EF 2.0X III extender is only compatible with the EF 70-200/2.8L, EF 70-200/2.8L IS,...
- 1
0
votes
0
answers
50
views
Canon AE-1 needs multiple pumps on cocking lever to fully cock shutters
This camera is a hand-me-down from my dad which I previously thought was broken until I put a battery from my AT-1 in and it fired just fine (turns out 3 or 4 LR44's I tried in 2017 were all junk).
...
- 1
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