Questions tagged [exposure]
Exposure is the total amount of light allowed to fall on a sensor or film during the taking of a photograph. This is determined by the exposure time (shutter speed) and amount of light admitted (lens aperture). Today, sensor/film sensitivity (ISO speed) is often also considered to be part of exposure.
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Why are my blacks coming out so noisy on a Pentax K-30 DSLR when using RAW format
I'm a new DSLR user with an older model Pentax K-30, using a 18-55@43mm lens (The lens that it shipped with).
I don't yet understand what all the settings mean, or how they are used, or the impact of ...
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I accidentally opened the back of my camera after taking 9 pictures. The count now says zero and the camera is stuck. What should I do?
I accidentally pressed the button to open the back of my camera but held the cover so it didn't open and no light got inside. It winds automatically and I could hear the sound of film winding but not ...
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Accidentally opened back of analogue camera while rewinding film, are all pictures lost?
I shot an entire roll of film on a Yashica FX-3 Super. While I was rewinding the film to remove, I thought I had rewound it all and opened the back. However, the film was not completely rewound and so ...
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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 ...
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Exposure meter's result EV relative to the film ISO density threshold
Let's take a film with properly measured ISO speed. It means that there is some threshold exposure where it's resulting density (if developed to a specific standard gamma) raises just slightly (there ...
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Why are my film photos coming out so dark, even in bright sunlight?
I shoot with an Olympus OM-1n, 50mm Zuiko lens on Kodak Gold 200 film.
It was a bright, sunny day so I was shooting with the following:
Aperture: f/16
Shutter speed: 1/1000
ISO: 200
The photos were ...
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Why are all my photos shot with a M38 Kodak Film Camera coming out super dark?
I bought the Kodak M38 off of amazon for an easy point and shoot, but all my photos came out super dark and I obviously can't control the exposure. Can I do anything or is it just a bad camera? What ...
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Why is my Canon's shutter speed so slow in bright light conditions?
My Canon 5D Mark 1, which has been in use for about 10 years, is strange. If you use Av mode or Auto mode, the shutter speed is very slow even when there is enough light. Even taking direct pictures ...
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Nikon D850 images are always underexposed
I have set my D850 to matrix metering and I shoot RAW only. When I review my images on the screen they look good in terms of exposure. I dont always check the histogram. However when I look at the ...
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Push-develop a film shot at box speed
What happens if I shoot a film with ASA 200 at ASA 200 but develop it at if it was rated ASA 400 (push 1 stop)?
Push-developing is used for compensating underexposed film, but what happens if I don't ...
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Why are my dSLR-shot landscapes consistently overexposed vs. the same shots on my smartphone?
I recently returned from a trip to New Mexico taking pictures in the mountains, etc. I was taking pictures both with my Nikon D3300 18-300 1.35-6.3g with a UV filter and my iPhone X. My D3300 ...
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Why are my photos taken with Kodak Portra 400 and Fuji C200 coming out grayish?
I'm fairly new to film photography. I have a Canon AE1 and I'm kind of discovering how to use it, understand exposure etc. I've done photos with Kodak color plus 200 and they came out nicely, recently ...
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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 ...
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My Nikon D7100 autofocus fluctuates and will not focus on distant objects
I photograph with a Nikon D7100 with a Tamron 18-400 mm lens. My camera is set to autofocus but when I try to photograph a bird sitting on a branch that is BEHIND near branches, the camera vacillates (...
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Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not?
Suppose I have a setup with 1 light source, 1 subject to be photographed, and 1 camera.
Keeping all parameters constant, if the light source gets closer to the subject, it will be more exposed, ...
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How is the picture (image signal), acquired by the sensor, shown in a display?
Let's consider a CMOS sensor with N number of pixels. For the sake of simplicity, let's consider an hypothetical Black and White sensor. Each pixel catches the energy provided by the input luminance ...
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Is Evaluative metering exposing the scene to 18% gray?
An article I saw mentioned that evaluation metering calculates the average to decide how much light received would be considered as properly exposed.
Only considering digital cameras, what is this ...
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How can I take a good picture of the moon with a phone camera?
With my iPhone 8+, how do I take a picture of the moon without it looking like either a big white blurry blob or like I took a pic of a mirror with the flash on?
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Understanding Entrance Pupil
let's consider a simple lens without diaphragm.
For a lens like this, the book Science for Curious Photographer states that:
The important fact is that the illumination of the image is proportional ...
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Why are there Lux - EV conversion tables, and not Lux Seconds - EV conversion table?
As far as I'm concerned, Exposure Value is measured in Lux seconds.
However, I see everywhere the conversion formula:
Lux = 2.5 x 2^EV
So, for instance, EV = 0 means 2.5 Lux.
Where are seconds?
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Image size trade-off with exposure
Suppose I am shooting in low light with a 20 mp (compact) camera.
If I change the image size to say 5 mp, can I then use a faster shutter speed / smaller ISO setting?
In other words, is there a trade-...
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Why are dedicated light meters supposed to be independent on the sensor?
As I have understood by this question, an exposure value of a certain scenario cought from a digital sensor (CCD or CMOS) results from:
the scenario luminance
the sensor sensitivity
the ISO, shutter ...
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How does long exposure work on a digital camera?
I'm curious about long exposure photography and I keep taking sequences of long exposure photos. However, my mind stumbles on this question when I think about my phone camera sensor.
How does long ...
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Is film photography characterized as having high exposure because they have low saturation?
Compared to digital captures, is film photography in fine art typically characterized as being bright or having high exposure by nature?
By exposure, I don't mean chemical processes applied to film ...
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How did this note "19/65 21/90 22/130" help previous owner of this old Zenit 12XP film camera?
Camera info
The camera in question is an old Zenit 12XP. It belonged to my passed-away father-in-law.
It has shutter speed regulations: B, 30-X, 60, 125, 250, 500
"ГОСТ/ASA" (ISO): 16 * 32 * ...
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Could this photo have been photoshopped?
I recently came across this photo that someone claimed to have taken on a Fuji brand camera. They claim that it’s a result of double exposure of their singular dog, but this doesn’t seem like double ...
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Why does my developed 35mm film have stripes of light on the photos?
I'm a relatively new user of film, getting back into it after a few years. I've had the first B&W 35mm film developed and there are vertical stripes of light on lots of the photos - often in the ...
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FZ300 Can I change the viewfinder and screen exposure?
I have a Panasonic DMC-FZ300, I set the camera in bracketing mode, then I reduced the exposure in such a way that the third picture is the one with the correct exposure. Trouble is that the viewfinder ...
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How bright should a 18% gray card be in my image when exposed correctly?
Let's say I have a 18% gray card in my scene and I want to set the exposure manually.
When I take a picture of the gray card what should the RGB values be when exposed correctly?
What is important is ...
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Darktable: How do I adjust the exposure on one half of an image?
I have some film scans from a half-frame camera, so each scan contains two pictures (side-by-side).
Some of the scans are consistently overexposed, but by different amounts. For example:
I'd like to ...
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Why are my photos coming out white?
My Canon EOS 500D camera shows white photos after capturing photos. I'm not referring to the balance of the photos. The photos that I try to capture comes out white. What is the cause?
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Film exposure accident.. Help!
Yesterday I was shooting in the sea and dropped my light meter in the ocean which unfortunately immediately broke!
This led me to shoot two rolls of Portra 400 using my Pentax 67 TTL on board meter.
...
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Why has my processed film come out in cold colours/blue?
I've been using my Olympus OM20 for about 2 years now, and today I got 3 processed rolls (Ultramax 400) back, and the photos have come out in very cold colours, almost blue.
So far, all photos in 2 ...
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Why are War Photographers able to take pictures that seemingly violate the exposure rule?
A lot of historical war photographs I've seen are capable of recording the subject in sharp detail despite the subject being in blazingly fast motion, at the same time having little to no depth of ...
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Retouch photo with brightness or exposure?
Two controls in software editors are Brightness and Exposure. Both seem to do the same thing: increase the lighting in the image if they're too dark.
Why would a outdoor photographer use either or ...
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How to tell if an edited photo has too much exposure?
Small sensor cameras produce photos that are dark. To fix this many increase exposure in their software editor. However, this fix can be quickly abused to the point of over-exposure, especially if the ...
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How to fix underexposed flash-lit portrait in darktable (and perhaps also in gimp), leaving background dark?
Shot a portrait with flash + umbrella (indoors at night, some artifial ambient light) - but it's underexposed.
In my first go at darktable I managed to properly expose the whole photo within 2 seconds ...
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Can you change displayed exposure when bracketing with D7500
I am using bracketing on both a D850 and D7500, and the issue I want to "fix" is the same for both cameras (and probably across all Nikon (D)SLRs)
When setting up a set of bracketing, you ...
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Can the Canon R6 self-timer influence exposure level in these two images?
Below are two night sky images taken with what appear to me to be identical camera settings: f/4.0, 8s shutter speed, ISO 800, focal length 93mm. The only difference I can spot in the EXIF information ...
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Photo of sprites in a clear dark sky, is this possible?
On Earth Science StackExchange (ES-SE) we recently discussed this question: Photo of sprites in a clear dark sky, how is this possible? A photograph of Red Sprites was captured by David Finlay (see ...
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How to fix exposure in a batch of images?
I took a timelapse last night, using flash. It's around 300 frames and it was taken in manual, 1/60th, ISO400, f/2.8. But all the images have slight exposure differences due to my strobes.
I ...
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What is the relation between aperture number and exposure, keeping all other parameters fixed?
My language is German, so forgive my lack in English words, especially with regard to photography.
I tried to understand at a very basic level the relation between aperture number and exposure and ...
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Does Manual iso = low noise?
I was taking some test shots today indoors (decent amount of light) set the iso manually to 800 looked through the viewfinder and I was at 1/20 (I was using Av mode) bumped the iso to like 1000 and my ...
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AE-Lock and Re-compose
I'm confused on how AE-lock works. I was advised and also tried this. Walk into a room point at what I want to capture, lock the exposure with AE-lock. Re-compose and take the shot. In theory the shot ...
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What determines exposure? [duplicate]
I’m trying to figure out what determines exposure is it Aperture and shutter speed? Or a different combo.
The reason I’m asking this is because iso just brightens the photo or magnifies the exposure ...
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Using Auto ISO when shooting
I was told it’s not good to use auto ISO. I responded that I will try to set my ISO manually in P,A,S,M Mode’s but I think I got issues. I keep seeing it in auto ISO, it’s getting me the shot even ...
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Sharp photos with kit lens [duplicate]
Hello I have a 80D with a kit lens 18-135 IS f/3.5-5.6
I take photos of my kids indoors and it seems that I’m almost always shooting at iso 32000 and up and it seems like everything is grainy (noise)
...
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How to meter for no lens on camera?
Assume for a moment that I wanted to take photographs with my SRL with no lens attached. Suppose that I wanted to get extremely blurry, mostly solid color photographs. How would I set the camera's ...
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Is deep depth of field AND bright exposure possible?
I know that a larger aperture corresponds to a brighter exposure and shallower depth of field for a given focal length.
Is it optically possible for a custom-built camera to form an image with both a ...
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In situations where you aren't compelled to pick high ISO (low light/needing a high shutter speed), is there ever a reason to NOT prefer low ISO?
Given the same amount of exposure, sometimes you may prefer smaller or bigger aperture because you may want high or low depth of field.
Similarly, sometimes you may prefer slow or fast shutter speed, ...
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