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by Russell McMahon

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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 ...

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5
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2answers
510 views

Should my Nikon D3100 adjust settings to allow for use of flash in AP or SP mode

When I'm shooting with the onboard flash in low light conditions, I observe the exposure preview settings between no flash and the flash popped up - there appears to be little or no difference between ...
7
votes
5answers
1k views

How does software raise exposure in post-processing?

Does anyone know of any algorithms or can explain mathematically how brightness (EV) is executed in post-processing? Does it adjust the level of brightness/RBG/contrast for each pixel? Does it relate ...
8
votes
5answers
495 views

Heavy colour saturation on night photos with new lens? Is this normal

I have a Canon 550D and bought a Sigma 17-70mm lens to upgrade from the 18-55mm lens kit. I decided to go out and try the new lens with some night shots. To be honest, the results were bad. I used a ...
6
votes
4answers
648 views

Does the same aperture at a shorter focal length allow for faster shutter speeds?

I was about to ask why the new Canon 24-70mm F/2.8L II doesn't have IS, but then I came across the answer to Why there is no Canon 50mm *IS* lens? and it got me thinking... (The short version of the ...
4
votes
5answers
2k views

What's the difference between exposure and shutter speed?

Is there a difference between exposure and shutter speed, or are the terms interchangeable? I read that "If you use a quick shutter speed, you can just raise the exposure to compensate." Is this ...
6
votes
4answers
610 views

Photographing microfiche readers: Bright light forces camera to darken image

I am a researcher and often have to take photographs of material from microfiche cards. The problem that I have been encountering is that on non-digital readers, there is a bright lamp behind the ...
2
votes
3answers
1k views

What metering mode should one use with autoexposure (AE) lock on the Nikon D700?

I will be visiting Morocco in week's time. I usually use matrix metering when taking photographs. However I have read that using the autoexposure (AE) Lock on the Nikon D700 one should use center- ...
2
votes
2answers
362 views

Can the camera select wrong exposure just because of color?

I took two pictures of two different flowers with portrait setting. One came perfectly exposed with dark background, the other seems over exposed with brighter background. I tried it again and the ...
3
votes
2answers
255 views

Is the dynamic range affected by exposure time?

For a given scene, if I take 2 similar shots: short exposure time (maybe using higher aperture, higher ISO...) long exposure time (lower aperture or ISO) The goal is to have the shots with the ...
3
votes
3answers
1k views

Night-time football game under field lights

I am shooting a little league football game at night under the field lights for the first time amd I have a few questions to ask. I will be using the Canon EOS 60D camera with a Canon 24-70mm 1:2.8 L ...
6
votes
3answers
228 views

What is the effect of directly changing exposure from the camera's menu? [duplicate]

Possible Duplicate: What is exposure compensation? In the Aperture Priority mode (Av), changing the Aperture size would automatically adjust the Shutter Speed to ensure proper exposure. I ...
12
votes
4answers
421 views

How to edit the exposure/contrast of two different areas of a photo with a smooth transition between the two parts?

I'm a complete newbee in photography and in photography editing, but I made a a photo I really like with my phone, and I would like to improve it numerically. Here is the photo. I know how to use ...
3
votes
1answer
484 views

Can a consumer-grade camera take good aurora pictures?

It's generally hard to take clear pictures of auroras because they are fairly dim and move around. To get enough light for a good picture, you need a long exposure. But then your picture will be ...
5
votes
5answers
857 views

When I change the EV compensation, how will that affect my aperture, shutter speed, or ISO?

Let say that we have the following values, as an example: Shutter speed: 1/40 Aperture: 2 ISO: 1000 How can I get the EV number for this exposure, extract (or add) an EV value (0.33, 0.66 etc.) and ...
3
votes
3answers
2k views

Long exposures without turning night into day

When taking Night Photography you will use long exposures. Sometimes these exposures can be very long. My question is this: How can I take long exposures without turning a night scene into a scene ...
1
vote
1answer
999 views

How can I take long exposure photos with a webcam?

I have a very simple webcam made by A4tech. It already has an exposure function (in its settings) and it's good in low light. I want to be able to take even longer exposures. I have found this but ...
1
vote
1answer
220 views

Skin tones become yellower/ oranger when flash is on

When I take pictures of people, the yellow and red tones seem to be enhanced and the result is a more jaundiced complexion in best case scenario and orange and a bit shiny if their skin is a bit oily. ...
5
votes
0answers
106 views

How can I take slow, wide-open photos in bright light? [duplicate]

Possible Duplicate: What are neutral density filters and how do I use them to create long exposures in daylight? I like to take photos of motorsports and high speed action. Sometimes I use ...
3
votes
1answer
508 views

How does the sensitivity of camera sensor behaves with the infrared filters?

I am puzzled about the behavior of camera sensor to the infrared spectrum. I have heard that the you must remove the internal infrared filter to capture infrared pictures. So, I removed it and used ...
6
votes
2answers
1k views

Pentax P-TTL: Why and when does underexposure occur and what can I do?

Pentax's P-TTL flash metering system tends to be unreliable and may underexpose at times. When and why does the system underexpose and what can I do? I want to know the situations that cause flash ...
5
votes
1answer
280 views

Is there a way to correct exposure on photos in a panorama taken without AE lock on?

I made a stupid mistake on some of my pano's I shot this past weekend, I forgot to hold AE-lock. Now I've got about three photos that I can't use due to difference in exposure on them. Is there a ...
0
votes
2answers
672 views

Why are my images always underexposed in Tv/M mode?

With the 18-55 mm kit lens on my Canon 1100D in Tv or M mode, when the shutter speed is more than 1/200th it always always produces dark images. The max f-stop this lens can go to is f/3.5. SMALL ...
2
votes
2answers
232 views

how do I long expose in harsh light for a lake view?

I have this problem of long exposure in harsh light. This in a lake side where I wanted to get that silky movement of water with a stone in foreground. However, since the daylight was harsh my images ...
6
votes
4answers
537 views

How to achieve good scenic photos without HDR?

I've always had a problem getting exposure right with shots of the outdoors. I always seem to need to do manipulation which ends up in noisy photos. I know HDR would sort it out, but I'm using a ...
2
votes
2answers
781 views

Modify exposure of a specific part of an image using rawtherapee or gimp (ufraw)

Is there a way to modify the exposure on a specific part of an image using rawtherapee, Gimp's ufraw, or any other free/open source tool?
4
votes
2answers
810 views

How to get a smooth gradient on sky?

I wanted to capture this beautiful dawn. The colors came well but the gradient is banded, if you see closely. I know we can post process the image to smooth it out, but I would like to directly ...
6
votes
6answers
523 views

A Good “Flexible” Default Setting For Shooting Highly Dynamic Subjects

I know this is quite vague and that some of you might say the setting depends on how much lighting the place has. However, I want to know what "default" settings I can use for shooting pageants, float ...
3
votes
4answers
1k views

How to use built-in flash with off-camera 430ex ii on my Canon 600D

I have a 430EX ii speedlite which is controlled by the built-in transmitter in my 600D. I want to use the built-in flash as a fill light while using the off-camera speedlite as a key light. How can I ...
8
votes
5answers
760 views

Is it usual that a narrow aperture gives a darker picture in aperture priority mode?

I have a Nikon D60 camera here with a Nikkor 35 mm 1:1.8G lens. I don't have any experience with any other digital SLR, so excuse the beginner question. When using aperture priority mode, a narrower ...
2
votes
4answers
1k views

How do I prevent the background from going dark when using the flash with a subject?

This is with Flash, short shutter exposure time, and zoomed in This is without Flash but with long shutter exposure time when using the Flash the background tends to get dark and the subject ...
20
votes
2answers
6k views

What is the Black Card Technique?

I have found interested comments on 500px: Non-HDR-processed / Non-GND/ND-filtered / non-blended● Black Card Technique and group on Flickr. Could somebody explain how to and cons and pros of this ...
3
votes
2answers
503 views

Can a new focusing screen affect exposure metering?

After i replaced original focusing screen with a split one, it seems that every picture i take is overexposed now. Can it affect on exposure? Or i damaged something while replacing it? I own Nikon ...
5
votes
3answers
2k views

Is over-exposure preferable than under-exposure?

I am learning the world of Photography and always attempt to get the best possible shot but there are times when getting the exposure just right can be tricky depending on the situation. (I can tell ...
5
votes
4answers
1k views

What's the difference between holding a half-pressed shutter button and pressing the AE lock?

As I have been looking around today the AE lock button is supposed to lock in the focus and exposure settings (aperture and shutter) so that the picture can be recomposed before taken. I also believe ...
11
votes
1answer
878 views

What is “exposure safety shift”?

I ran into the term "exposure safety shift" in this answer. What is exposure safety shift, and what is its intended purpose?
1
vote
3answers
447 views

What techniques are there to get focus and/or lock exposure other than center, half-press, and recompose?

The way I shoot is this: turn the camera so that the subject is in the middle of the viewfinder, where my center point is, press the shutter half way, the camera now focuses the lens on the subject ...
3
votes
1answer
366 views

How do you photograph sand dunes?

In 2010 I was lucky enough to visit Death Valley. While we were there we went to the sand dunes. I took this shot Its not how I remembered the scene, It seems as if a lot of the detail has been ...
3
votes
2answers
452 views

Why does the exposure vary in these Nikon flash photos?

The following 4 photos were all taken with a Nikon D300 at 1/250s, f/5.3, ISO-400, in shutter priority mode, with the on-camera pop-up flash. The only difference between them is the exposure bias, ...
17
votes
2answers
5k views

What is T-number / T-stop?

Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used ...
-2
votes
1answer
913 views

How does aperture affect exposure? [duplicate]

I've heard that aperture can change the exposure, but I would like to know if this is true, and how it does it. P.S. I hope this question isn't dumb like my last two.
5
votes
4answers
5k views

How can I set an exposure time over 30 seconds with a DSLR?

Most DSLRs have an exposure time limit of 30 seconds. Now I'm asking myself how is it possible to create images about over 1 hour or longer, like these two: ...
18
votes
3answers
973 views

Why does a 15-second exposure on my camera actually last 16 seconds?

I was doing a test and wanted the shutter to stay open for 15 seconds -- no problem, I have a 15-second exposure setting in my camera. It seemed to stay open for about an extra second, though, so I ...
6
votes
2answers
304 views

Can telephoto lenses cause the background to be darker than the foreground in the same light?

I took this photograph yesterday afternoon at around 5:15pm EDT, about two hours before sunset: The sky, in my perception, was bright, and my little subject is standing in the same lighting as the ...
31
votes
7answers
9k views

What are the advantages and disadvantages of using auto ISO on a DSLR?

What are the advantages and disadvantages of using auto ISO on a DSLR? Using manual ISO obviously gives you more control, but auto ISO may mean that you get "the shot" under quickly changing ...
1
vote
2answers
214 views

What settings do I need for shooting a candid against the sky?

I have Canon 1000D. Most of the times I use canon 50MM F1.8. I use evaluative metering and single point (center) auto focus. What setting do I need to change to have metering of sky (say red of ...
3
votes
4answers
375 views

How to best view test shots on camera LCD in bright, outdoor photo shoot

A couple weeks ago I did a basic outdoor photo shoot for a family. It was mid day, and the sun was out. I took test shots initially and when viewing the shots on my DSLR's LCD screen they appeared to ...
4
votes
4answers
562 views

Why are these light trails large blobs of light instead of nice thin lines?

I'm trying to shoot a traffic light trails with my point & shoot camera (Panasonic Lumix DMC-LZ8). But the oncoming vehicle headlights are appearing as large blobs of light and not exactly thin ...
1
vote
1answer
175 views

Is this picture too dark? [closed]

http://500px.com/photo/5546307 Probably some personal taste applies here too, but Would be better to have things more bright in order to have some area which are at the bright end of the range? ...
3
votes
3answers
667 views

Double exposures straight to a memory card?

I'm looking to work out why some photos I have taken with my phone have strange images of a girl in them, when she clearly shouldnt be there. Can a photo taken with a normal camera phone double expose ...
3
votes
1answer
630 views

Ways in order to achieve dramatic lighting styles?

My question is more specific to the situation I am going to be shooting [with the subject being a person laying down in a hospital bed] The photo will be taken from the ceiling above the bed and ...