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Photography

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.

687 questions
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5answers
4k views

Do f-stop and exposure time perfectly cancel?

I am photographing a scene with white and black elements in it. Starting at the f/22 stop, I widen the aperture one stop and decrease the exposure time by a factor of 2, take a picture, and keep doing ...
3
votes
4answers
334 views

Why does color hue change on different exposures?

When shooting with long exposures (multiple to tens of seconds) I noticed that in some cases colors in the resulting photos change hue. This was on Canon EOS 1100D, but I've also seen such a problem ...
2
votes
6answers
71 views

Do I need 1/128 flash power at guide number 43-44 or is 1/32 enough?

I am planning to take photographs that have a shallow depth of field (50mm f/1.8 on a crop sensor body) and that are also lighted by an external off-camera flash. I am comparing two external flashes. ...
5
votes
4answers
803 views

Why did this image turn out darker?

In this tutorial on creating christmas themed images the author describes how she adjusted her exposure settings to add more weight to the christmas lights She says she went from f/2.8 and 1/3 of a ...
0
votes
1answer
72 views

How can I manually set EV in Lightroom to take a neutral density filter into account when merging photos?

I shoot a couple of Images and try to merge them with Lightroom. Since a few (but not all) of the shoots were taken with an ND-Filter. I need to somehow tweak the EV value of the Photos I took with ...
-4
votes
0answers
66 views

Can this photo be fixed for ID purposes [duplicate]

I am new to this particular photography exchange, but was wondering if anyone knows if it is possible to fix this particular photo for ID purposes for the police, as this was captured when someone was ...
4
votes
2answers
73 views

Does the T-number account for lens vignetting, or only for glass/coating transmission?

Surprsingly I could not find information on this. Many lenses have vignetting profiles available. Vignetting changes if you use a cropped sensor, or, in case of zoom lenses, can change with zoom. ...
1
vote
1answer
60 views

HDRI with ND Filter

When I take images for composing a HDR image later how can I use an ND-Filter. For example I capture 5 images whitout an Filter and then add for the 6 and 7 shot a 10 Stop ND-Filter how can I tell the ...
1
vote
1answer
119 views

Why is same image exposed at 100 ISO noisier than 3200 ISO? [duplicate]

I used to believe that ISO adds noise as a drawback to increasing exposure, but after researching the topic I arrived at the conclusion that it is a misconception. By amplifying the existing signal ...
0
votes
3answers
80 views

Shooting on Manual and still getting variation in exposure

Basically i shoot clothing on a hanger on a white background. I have everything set up custom that never changes, a light and a camera that also never move. Yet when i change the clothing item i'm ...
0
votes
2answers
53 views

How do constant aperture zooms produce identical exposure, even though focal length is larger? [duplicate]

My understanding is that a larger focal length corresponds to a larger working aperture diameter, since the numerator is larger. Why doesn't a larger working diameter correspond to a brighter image? ...
-1
votes
3answers
92 views

Mathematical definition of EV on a RAW photo? [duplicate]

I'm trying to write a program that takes in a matrix full of 12-bit RAW sensor values (that range from [512-4096]) (512 is the BAYER sensor black level--> i.e. what pure black is defined as) and ...
3
votes
3answers
98 views

How do I figure out what ISO to use when shooting film?

I'm new into film and I recently bought a pack of 200 film. I'm just not sure what ISO to use. I don't want my photos to come out over or under exposed. (I have a Minolta X-700)
4
votes
4answers
613 views

What is the relationship between film speed and the ISO setting on my film camera?

What is the relationship between the speed number of the film you put into your film camera and the ISO adjustable setting on the camera itself? Do you put them on the same number or do you adjust ...
1
vote
1answer
94 views

How to calculate difference in exposure between two given frames?

This question regards exposure. I have a project I am working on where I need to be able to calculate the exact number of stops between two given exposures, with the end goal being to match the ...
0
votes
1answer
72 views

Overexposed and not clear photos Olympus stylus 1

I am having some issues when taking photos with my Olympus Stylus 1. When setting things in auto photos are overexposed and a bit blurry. I have taken the same photo with a GoPro5 all in auto and the ...
0
votes
4answers
191 views

What is the relationship between lens diameter and exposure?

All of the online calculators for exposure, I have seen, factor in time, film speed, and aperture (which is a function of the iris diameter and the focal length of the lens). However I would have ...
-1
votes
3answers
107 views

If I use my digital camera (w/min. ISO of 200) as a light meter, how do I set exposure for ISO 100 film?

I have a Fuji X-T100 and its lowest ISO setting is 200. Now, I’d like to shoot some slides like Provia 100 or Ektachrome 100 as well as Portra 160, using my Fuji as a light meter (it works pretty well ...
0
votes
4answers
231 views

How can I get a high shutter speed and correct exposure when taking photos of horses in an indoor arena?

So I do a lot of inside photos. The problem that I'm having is a need a fast shutter speed without a flash. Like horses inside an arena. I can't have a flash but I need to take still photos. But the ...
3
votes
4answers
157 views

how can I have equivalent exposure and identical white balance while changing f stops using speedlight?

how can I have equivalent exposure and identical white balance while changing f stops using speedlight? im shooting from shoes when it comes to the moment of changing f stops from 5 to 16 in order to ...
4
votes
1answer
164 views

Why does push processing seem to be so popular?

It seems that many people are very eager to push their film. If you check sites such as Flickr or other communities discussing film photography, it can feel like almost as many people are shooting at ...
5
votes
9answers
767 views

Should I continue to learn exposure on a film camera or switch to digital?

I have a Canon AE-1 but I’m new to photography. I mean it’s always interesting me but I never did anything until now when I found this camera in my grandma's attic. It works pretty well. I mean I ...
2
votes
2answers
140 views

When would lack of auto-exposure bracketing (AEB) be a deal-breaker for an entry-level DSLR? [closed]

I am a beginner to DSLR, and I am currently shooting with Nikon Coolpix. As an upgrade I am looking to buy D3400. I checked its specs and seems like AEB is missing. Is it really needed for a beginner ...
1
vote
3answers
161 views

Nikon FM2 - problem?

I recently purchased a Nikon FM2 and was really looking forward to getting into film photography. However, my photos appear to be blank / partially exposed. For example, some look fine, others are ...
1
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3answers
240 views

How to take a dark photo of a dark room?

I was trying take a photo of a room at dusk. No artificial lights and the room was quite dark - it was difficult to read but not pitch dark. I adjusted the parameters so that the exposure meter in the ...
3
votes
2answers
143 views

How can I bump up shadows in post without overexposing the image?

I'm trying to create a Photoshop/Lightroom RAW processing preset to process 1200 images for photogrammetry. It's important that the lighting on them is as flat as possible and the shadows get bumped ...
12
votes
3answers
2k views

What are physical causes of clipping?

What exactly limits modern digital camera sensors in capturing light intensity beyond certain point?
2
votes
0answers
43 views

Canon DSLR photos underexposed [duplicate]

I have a canon DSLR and even in Manual mode or with proper settings, I have to bump aperture, shutter speeed AND ISO to get photos to be even CLOSE to the right exposure. Currently have my ISO set to ...
11
votes
10answers
4k views

Either background is overexposed or the foreground is underexposed. Are there possible solutions/approaches?

I use an Olympus EM-10 with a Panasonic Lumix MFT lens. No other accessories apart from the build in flash. I trained a situation in a restaurant to take a picture of the table inside with an outdoor ...
5
votes
3answers
2k views

Are burned out highlights bad?

I have read many answers and articles saying that I should avoid blown out highlights, but is it really a bad thing? Why should I avoid it?
1
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1answer
94 views

How to use Pentax A3000 in dim lighting?

My Pentax A3000 doesn't have shutter speed control, only ISO and a few modes, B (bulb), 60 for flash, program, and aperture. I keep it on program, but what should I do if I want to shoot in darker ...
12
votes
3answers
1k views

Why do my photographs taken with a film camera look so saturated?

I’m starting to shoot photographs using my Dad's old camera, an Olympus OM-4. I’ve noticed that in comparison with my friend's photographs mine are a lot more saturated. Why can it be? Here's an ...
3
votes
1answer
180 views

What is causing dark pictures in Auto Exposure mode?

I have been using my Nikon D40x in Automatic mode, and it went from taking beautiful pictures to suddenly taking very dark pictures. I have done a "reset", thinking that I must have hit a button that ...
2
votes
2answers
164 views

How to get bright concert photos?

I've been starting to shoot some live music recently and have been doing an okay job and see an improvement with each time I shoot. However recently I was shooting and all of my photos have come out ...
16
votes
8answers
3k views

Does using long exposure together with ND filter make the scene look more evenly lit? [duplicate]

Suppose I try to shoot a piece of forest with trees casting dense shadows during daylight. It looks something like this to a human eye (part of larger and more detailed image from here) In the image ...
2
votes
1answer
96 views

Night portrait with noiseless in focus background [duplicate]

We know to take a noiseless night landscape/cityscape, we need use a tripod and set a low ISO. For example in a scene I use ISO 100, aperture f/8.0 and exposure time 30 seconds, I get a night ...
3
votes
2answers
106 views

Requirements for long-exposure night time webcam

I am working on a computer vision project that requires repeated measurements of the amount of light a specific building emits at night. I want to set up a webcam and a Rasperry Pi, and set it to take ...
0
votes
1answer
52 views

Why would a webcam image be brighter in the corners, rather than in the middle?

I have a webcam mounted inside an integrating sphere, which is dimly lit by LED and produces nothing but sensor noise. It's part of a daft random number generator I built. This arrangement is like:- ...
22
votes
5answers
6k views

Why doesn't the picture become darker the more you zoom in?

As your lens's focal length gets longer, fewer photons pass through the lens to hit the mirror/sensor. Why don't you see darkening when you look into the viewfinder and zoom in with a zoom lens, and ...
5
votes
6answers
704 views

Can I maintain the same flash pulse duration but increase light with multiple flash units?

I own a Yongnuo YN-560 III speedlite, and I found out that it lets me freeze motion (for example, a water splash) at 1/16 of its power. However, the amount of light at 1/16 is not enough to properly ...
11
votes
6answers
4k views

Why are flash pulses so short?

I was surprised to learn that most flashes last only 1/1000s instead of lighting up for the entire exposure time. Why? If the flash were to light up before the shutter opens and turn off after the ...
0
votes
1answer
318 views

why exposing with 18% gray card does not give IRE near 40?

I am trying to understand how to get perfect exposure using gray card. With my Sony a6500 using ITU709 gamma, I locked exposure by doing spot metering on the gray card. When importing in final cut pro ...
3
votes
4answers
721 views

Why are my photographs on Kodak Portra 400 coming out hazy and gray? Am I getting the exposure wrong?

I'm pretty new to film photography and photography in general. I've been taking my cameras (Canon A-1 or Pentax ME super, portra 400 film) with me to most places and trying to gain as much experience ...
4
votes
4answers
893 views

With the same camera settings, will a photo always be exposed correctly across different cameras?

I want to do a photo shoot using film, but due to not being able to see the shots I've taken I would first like to take a digital photo, then recreate it using film. If I used the same focal length, ...
1
vote
1answer
154 views

How to do this prismatic/double exposure effect?

Hello all, just saw this picture on Instagram and was wondering how they got this effect and what the effect is called? Double exposure?
0
votes
1answer
145 views

Exposure value changes but image brightness remains same (Nikon D5600, Manual Mode)

I have Nikon D5600. I have tried several times in Manual mode to change the exposure value by pressing the exposure button (given in the top control) and rotating the dial. I can see that the exposure ...
13
votes
5answers
3k views

Lighting up a subject during sunset without a flash?

I’ve recently been trying to experiment with sunset portraits but I keep encountering a problem where the sky is lit up exactly how I want it but the subject is under-exposed, with little to no ...
3
votes
2answers
313 views

How can I get consistent exposure while allowing aperture changes on Fujifilm X-T2?

I'd like to change aperture and keep the exposure consistent while taking multiple photos of one scene. I am aware of the exposure triangle. I know I need to increase ISO or decrease shutter speed by ...
9
votes
2answers
3k views

Is the white balance wrong in these field poppy pictures?

Yesterday I went out to take some pictures of a field of poppies next to my home. There seems to be something wrong with the color in most of the pictures. The first one of the following 3 pictures is ...
12
votes
2answers
3k views

How to capture rays of light in a photograph using a DSLR camera [duplicate]

I'm using Nikon D750 DSLR camera. How can I capture the rays of light as represented in these two black and white photographs? I mean in terms of ISO, aperture and shutter speed and filter use. by ...

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