All Questions
26,773
questions
10
votes
2
answers
3k
views
How can I take good photos of stars out of a cockpit window using the Samsung 21 ultra?
I am an airline pilot and as the winter is coming and we get nice clear nights I am seeing masses of stars out the flight deck windows. At night we have dim lighting in the flight deck and when I try ...
- 201
0
votes
2
answers
65
views
Battery care and time resets?
In the past, I used to always leave one battery in my cameras.
I have a set of photography and videos cameras including some Canon, Panasonic and Sony.
I currently use them every few weeks, sometimes ...
- 253
-4
votes
1
answer
110
views
What is a .webp file?
I am accustomed to using old file formats. For example,
.JPEG
.BMP
.GIF
Beginning in the ...
1
vote
2
answers
152
views
Grey circles in the background in photos
All my photos contain grey circles which is especially noticable on light background (e.g. sky). I don't know what is the name of this specific artefact and what is connected to (lens? camera?). So ...
- 13
1
vote
3
answers
115
views
Megapixels vs Compression Artefacts
Assume everything is equal such as lens quality, sensor etc, except the megapixels. Does cameras with more megapixels produce pictures with less compression artefacts than cameras with less megapixels?...
- 137
1
vote
1
answer
69
views
All my photos taken on canon powershot sd300 are overexposed
I got this camera recently and it’s been working fine in dark setting with flash but whenever i turn off flash or go anywhere with any sort of natural light the pictures come out almost white. I’ve ...
- 11
0
votes
0
answers
33
views
D5600 number of focus points does not display
Camera in AF-A and number of focus points set to 9-39. The view finder only shows a single point, centered, which can be moved manually, pressing shutter to focus never shows the 9-39 points available ...
0
votes
1
answer
95
views
Does my camera still work?
I’ve left my camera untouched for years. as soon as i found it i order the charger online. i am currently charging it but it is not turning on. does it still work? ( it is an older kodak — easyshare ...
1
vote
0
answers
66
views
How to set proper exposure in Darktable with scene-referred workflow?
I don't understand how to set proper exposure in Darktable.
A few aspects of Darktable are opaque to me and contributing to my confusion. Such as, what the histogram actually shows when the Exposure, ...
- 11
0
votes
0
answers
84
views
Is this effect because of the lenses? what type?
https://www.instagram.com/p/CwsKDthOdST
So in this video, the legs of the man look really small. I thought at first it must be because of the lenses but if it were for wide angle lenses, that would ...
0
votes
1
answer
29
views
Canon SL3 and Godox V1
I have searched to find an answer for one of my students and need help. Will the Godox V1 and Godox trigger work with the Canon SL3. Nikon is
3
votes
4
answers
1k
views
Airy disks and pixel pitch on circle of confusions?
I read in this paper by Toshiba, which is in regards to optics in machine vision, that
In machine vision, which processes each pixel of an image sensor at high brightness levels, the permissible ...
- 143
1
vote
3
answers
170
views
My new manual focus lens has stiff focus ring. Over-lubricated?
I recently bought a Jupiter 37am lens, which is a 135mm f/3.5 retro telephoto lens. The lens looks good and the glass is clean, but I have an issues with it.
The focus ring is very stiff and hard to ...
- 125
2
votes
2
answers
710
views
Is this diagram I've drawn in regards to Depth of field correct?
This diagram is modelled after a video I saw on depth of field formula and its derivation. I have now learnt a bit more regarding Depth of focus and how it refers to "the tolerance of placement ...
- 143
0
votes
2
answers
115
views
Why is depth of field not always symmetrical about the object, yet depth of focus is practically symmetrical?
I have found an explanation on this, however I cannot seem to picture what the explanation is saying. From a Toshiba technical article:
Remember that the previous subsection mentioned that the depth ...
- 143
0
votes
1
answer
47
views
Nikon D810 FX- Aperture Question
Can you change the aperture on the camera without the lens or does the lens on the camera have to be connected to the camera?
- 1
3
votes
4
answers
2k
views
If focal length does not affect DOF, why doesn't a 25mm lens at an f-stop of 4 give me the same DOF as a 100mm on an f-stop of 16?
After having spent some time reading about DOF and the derivation of its formula, I tried calculating the theoretical DOF of different lenses. Now to my knowledge, a camera using a lens with a focal ...
- 143
1
vote
2
answers
100
views
Why do Adobe Bridge and XnView MP show incorrect thumbnails for cropped scanned images?
When I scanned in some 4"x6" photographs, my scanner produced jpg image files for the full 8.5"x11" bed of the scanner. I used XnView MP to crop the images, but now both XnView MP ...
- 204
2
votes
1
answer
44
views
Print development temperature?
What is the best way to regulate the temperature of developer and fixer whilst tray developing prints?
- 21
4
votes
2
answers
162
views
Is it possible to get double or multiple exposures on a used SD card?
I’m getting “ghost deer” on my trail cam. They only show up on the night pictures (black and white) and hit the paint palette which turns them into color.
Is it possible that a previous image of deer ...
- 41
1
vote
2
answers
605
views
Backup compression that takes into account similarities between images? [closed]
I'm trying to reduce the total size of my backups without sacrificing quality, and more importantly, without discarding photos1.
There are plenty of image formats that offer great compression, or ...
- 113
0
votes
1
answer
98
views
Can I continue shooting APS film if I think the roll isn't fully exposed?
My new APS film says it is fully exposed after taking just one photo.
Can I continue shooting with it?
- 1
1
vote
1
answer
65
views
digiKam cannot find photos after upgrading to a larger hard drive [Linux] [Ubuntu 22.04]
I'm using digiKam 7.5 on an Ubuntu 22.04 system.
After upgrading my laptop's SSD to a larger one (to make more room for more photos of course :) ) by backing up my home directory and then restoring it ...
- 121
1
vote
1
answer
151
views
How can i produce sharper photos? [duplicate]
I am a relatively new photographer and I just purchased a Canon R7 and the Tamron SP 35mm f/1.4 DI USD lens. 1. I have read that the lens I am using is super sharp and have seen photos of it that look ...
- 13
3
votes
1
answer
133
views
Does the Nikon Coolpix 900 need the exact CF card specified in the package?
I was given a Nikon Coolpix 900 (1998 model) but there was no CompactFlash memory card. Basically in so many words the original package came with a: EC-8CF 8MB CompactFlash card but now I am ...
- 31
0
votes
0
answers
44
views
Cannot Select This File error on Nikon D500
I have a Nikon D500 with updated firmware to the latest version. I purchased a CFexpress card type B and formatted the card. I’m able to download my images to my Mac using a card reader. But when I ...
- 1
12
votes
10
answers
5k
views
Can you "open" RAW camera files? [closed]
I was having a conversation with my father who used to be a photographer, and I said “when I open a raw file…”
He interrupted me and said, "you can never open a raw file, the editing software ...
- 129
0
votes
2
answers
84
views
why is there black spots flashing on my pictures on lumix dmc tz80?
i bought a second hand lumix DMC TZ80, and there’s like black flashing things popping up on my pictures i took on it, like the picture i put here, the black things appear in the spots where it’s very ...
- 1
2
votes
1
answer
177
views
When shooting raw stills, does the tone mode setting matter?
I'm going through some of the settings on a Nikon Z8, and one of the options when shooting raw is to switch the tone mode from SDR to HLG.
In principle, I understand what these two modes do: HLG ...
- 658
0
votes
2
answers
223
views
How can I determine if this image has been altered in any way?
I need help trying to see if this photo has been messed with in any kind of way.
...
- 1
0
votes
2
answers
151
views
Is the Canon EOS 30 considered a good camera in 2023?
I'm planning to buy a new SLR camera for my next trip and I saw some pictures taken with a Canon EOS 30 that I really liked but they were all taken with a Canon EF USM lens. Do you think the camera ...
- 21
0
votes
2
answers
47
views
Nikon D500 is over exposing photos in burst mode
While using my D500 in burst mode, and upon review of the photos it appears that every other third photo or so is blown out (over exposed). Any suggestions would be greatly appreciated.
2
votes
4
answers
188
views
What ISO should I use on unbranded film?
I bought a bag of unbranded film. It was 60 dollars for 15 rolls so I couldn’t pass up. But obviously I don’t know the exposure or the ISO. Does anyone have a suggestions on the ISO/ASA I should shoot ...
- 21
1
vote
2
answers
108
views
Why isn't my F Stop changing on my Nikon D7200?
I can use the dial but the number never goes up or down. It stays at 0. I tried holding down the +/- while turning the front dial and it just adjusts the amount of light coming into the view finder. ...
0
votes
1
answer
69
views
Why is my 77-55 step down adapter on Canon RF-S 18-150mm F3.5-6.3 IS STM lens not fitting?
I've bought a CPL lens 77mm and a 77-55 step down adapter, but the problem is the step-down adapter is not fitting on the lens. The CPL fits fine on the step down but the step-down is not fitting on ...
0
votes
1
answer
57
views
Z5 NON Cpu lens atttached
I got this error message on my nikon Z5 Ether no lens is attached or the attached lens is non-CPU lens. to shoot with a non -CPU lens, change the shooting mode to P, S, A, or M
I did all cleaning ...
3
votes
1
answer
61
views
Can I use a hotshoe sync adapter with the Canon multifunction hotshoe?
A long time ago I used a Canon 400D together with Nikon Speedlights SB-25 and SB-24.
To trigger them, I used this device in the screenshot to connect via cable.
Many years later (today) I tried this ...
- 131
1
vote
3
answers
94
views
Why is softproofing before print necessary - can't an optimal adaptation be computed automatically (at least a proposal)?
I am struggling with the need of softproofing before printing photos. I usually use Adobe Lightroom for editing images and also for printing. I use color profiles - all good. What I do simply not ...
- 111
2
votes
1
answer
60
views
Is a Yongnuo 50mm f/1.8f F-mount lens compatible with Nikon F55 or Nikon F80 film SLRs?
I have a Yongnuo 50mm f/1.8N (AF/MF) lens that I use with my Nikon D5600 DSLR (aps-c). I'd like to buy a Nikon SLR film camera, an F55 or F80, and use it with this Yongnuo lens. What issues will I ...
- 21
0
votes
1
answer
72
views
How can I tell what trigger will fire my third-party flash off-camera without an additional trigger?
I’m looking for a wireless trigger that can be used off-camera without additional wireless triggers.
I’m looking at my Sunpak flash DF4000U setting. It has ch 1-4, ratio A B C and multi-mode has 1-...
- 1
0
votes
0
answers
127
views
Can you change effects after capture on Instax Mini Evo
I've just received my Instax Mini Evo and am getting to grips with it.
Obviously you can change film and lens effects before capturing a shot using the 2 dials on the camera, but can you change those ...
- 101
0
votes
2
answers
65
views
Obtaining original creation data of photo
I need to obtain the original creation date of a photo taken on a phone. This phone does not store any EXIF metadata.
How can I get the date when the photo was originally created ?
16
votes
3
answers
5k
views
How can I make the milky way more apparent in my photos?
I was using 6400 ISO with a f2.8, 28 mill lens with a .46 adaptor on a canon m50 for about 15" for this photo. I tried a 1.8 50 mill, 28 mill w/o adaptor, longer exposure, shorter exposure, ...
- 161
1
vote
1
answer
30
views
Canon PowerShot A810 lens error
I have a Canon PowerShot A810. I don't know what happened to it, but when I turn it off, the lens doesn't close completely, starts buzzing, and after a few seconds, it says "Lens Error".
It ...
0
votes
1
answer
180
views
How can I photograph the annular eclipse high in the sky and still get a foreground in the image using 500mm lens?
How can I photograph the annular (or partial) eclipse high in the sky and still get a foreground in the image using 500mm lens?
In particular, I'm interested in:
If a 10 or 15 stop ND filter would be ...
- 1
0
votes
1
answer
65
views
I See colors in the highlight of my video and images. Sony a7iv
I See colors in the highlight of my video and images. Sony a7iv
2
votes
3
answers
181
views
What is the use of focal length in a Fisheye lens?
This is similar to:
What does the focal length of a fisheye lens mean?
What is the relationship between field of view and focal length for fisheye?
But actually, I have a different question. I have ...
- 307
4
votes
1
answer
1k
views
Why does my first picture have a dark area and the next is fine?
I was in class and took a picture of the slides with my phone (iPhone 13 if that helps) but the first one (I zoomed in a little on that one) turned out as shown while the next one was fine. The two ...
- 41
4
votes
4
answers
113
views
Using a <24 panel colour checker in Darktable
It's common in my industry for reference/archival photographs to be taken with a combined scale, grey, and colour checker card (often with rectification targets too). In most cases, the standard is a ...
- 61
2
votes
2
answers
1k
views
What might be the reason I cannot see the date a photo was taken in its metadata?
I was sent a .jpeg photo by gmail. It looks like it is pasted into the mail, but it also shows up as an attached file on the mail preview. Opening the mail however, the photo is in-line with the text.
...
- 21
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