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by Vian Esterhuizen

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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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1answer
576 views

Is auto-iso affected by exposure compensation in manual (M) mode on nikon d7000?

When we set the camera to M mode the exposure compensation (e.g. +2EV) does not change the aperture and shutter because we are in fully manual mode. If we set auto iso the iso however changes ...
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2answers
1k views

Multi-exposure on the Nikon D700

I would like to know how to use the multi-exposure on my Nikon D700. I tried a couple of times but the outcome was dismal. The object/ people in the photos were all over the place and not as a one ...
15
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2answers
1k views

What's the result of stacking ND filters in terms of total stops?

If you stack two 3-stop neutral density filters, does it reduce the exposure by 6 stops or 9 stops?
13
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7answers
606 views

Why can't digital camera sensors expose each photosite individually?

Why is it impossible for camera sensors to function the way the human eye can? What I mean is, why does a certain portion of the image have to be over/underexposed if we compensate for dark and light ...
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2answers
1k views

Nikon Live-View shutter speed preview - a non-feature in the future? [closed]

I have a D3200. It offers a great feature: simulated preview of the three shutter parameters in Live-View (shutter speed, ISO, aperture). That means, when I change any of these parameters, Live-View ...
29
votes
8answers
6k views

Should I shoot underexposed photos?

Someone more experienced than me said that he always shoots so that his photos are underexposed (darker) and I should too. The reasoning being that you can always increase the exposure in ...
13
votes
2answers
383 views

How can I use a histogram to expose correctly when the scene is very dark?

If I am photographing a scene with a lot of dark background, how can I use the histogram to tell if the exposure is correct? For instance, at an outdoor concert in which the performers are moderately ...
3
votes
1answer
160 views

What is Effective Aperture?

What is Effective Aperture? And how it can affect my exposure? Also how does it relate to magnification? A question that talks about effective aperture but without details
8
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4answers
10k views

How does TTL flash work in manual exposure mode?

I got the Metz 44 AF-1 flash recently that is TTL capable for my Canon 550D, and have been reading around to get a better understanding of using flash on-camera (Neil Van Niekerk's article on flash ...
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5answers
483 views

Why do RAW files only show you 8 bit of the 14bit recorded?

Following up from a previous related raw file latitude question. Why do RAW files record in 14 bit but only show 8 bit of data? The remaining data is hidden away to the right or left of the histogram. ...
2
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1answer
237 views

Why do all of these film photos look off color?

My friend is interested in starting up photography and asked to borrow one of my film cameras (my Minolta X-570) as a start. She just developed her first roll, and while a few photos look okay/correct ...
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1answer
75 views

Is Nikon ADL helping to increase the vividness of reflection in this picture?

This photo is one of the first I took with an N5100. I was surprised by the level of detail in the reflection; it was much less bright in person, at least as far as I recalled. The camera was set to ...
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3answers
495 views

How to shoot a shot with the moon and city skyline?

What is the best way to capture the moon with a city background? The moon is so bright that if I do long exposure to capture the city, the moon will be completely blown out into a white star. Is HDR ...
0
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0answers
1k views

Recommendations for use of exposure modes with Nikon D7100 DSLR

I'm looking for advice on handling tricky exposure situations, such as backlit portraits, in terms of picking between: 1. Manual exposure 2. Shutter/Aperture/Auto exposure, and using the AE/AF lock ...
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votes
2answers
751 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
532 views

How does 18% exposure algorithm work?

They all say and teach the rule that camera exposes to 18% grey. Then they go and show an example of shooting a white board or black board and they both show as a grey board in the camera. Great, but ...
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votes
2answers
326 views

Is it possible to take HDR-photos straight out of camera?

HDR is normally described as a post processing technique. I usually can't find time to do post-processing - thus I have turned out to favor SOOC-pictures ;-) My question is: Is it possible to create ...
0
votes
3answers
132 views

Weird color when dark area is brightened up?

Sometimes I have shots that are not well exposed (I shoot in RAW) and it's really dark. I would selectively brighten up the shadow area. Usually it's fine if the area is not too dark. But if it's ...
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1answer
45 views

Illumination question [duplicate]

I meter a surface at ASA 100 and get F4 at 1/15 second. What is the illumination coming off that surface in Cd/square foot ?
5
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2answers
466 views

Develop Canon Raw images on Mac OSX via command line into mutliple tiffs for pseudo-HDR

What is the best way to convert on the command line a Canon raw file (CR2) into 2 or 3 differently exposed tiffs for HDR/tonmapping? I would like to use Apple's sips, but couldn't find anything to ...
5
votes
2answers
107 views

How large an exposure difference before it's noticable?

I'm being forced to work with a shutter that jitters (e.g., a 1/60 shutter could be anywhere between 1/59 and 1/61). I can't change the hardware, so please don't suggest that. I would if I could. ...
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5answers
7k views

Differences between DLSR and SLT?

I already have a Sony SLT camera but I still wanted to understand the differences between DSLR and SLT. It's hard for me to compare because I don't have or ever owned a DSLR so the behaviour is very ...
8
votes
1answer
882 views

How to deal with large exposure shifts during time lapse?

First - I've 30 yrs shooting experience. Not a novice. But, total Newbie to Time-lapse. Just did my first couple of tests yesterday. My wife was shopping - had to occupy myself.... I kept them short ...
4
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2answers
152 views

Does a flash's TTL automatically adjust as I change its location?

I just bought a radio trigger for my flash. I was just wondering if I understood TTL correctly, as I move the flash around and changes the distance does TTL automatically try to compensate (assuming ...
2
votes
4answers
1k views

What is the best order to set exposure parameters (ISO, aperture, shutter)? [duplicate]

Let's say that you're in a very controlled environment, there is no hurry to get the shot, and you're shooting manual. In order to correctly expose the photo, what order should you alter the ISO (if ...
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5answers
795 views

What is “correct” exposure?

Photography has been my hobby for far too many decades - first on film; and now digital (for about seven years). I recently had occasion to use exposure bracketing seriously for the first time, when I ...
7
votes
5answers
1k views

How do I get proper exposure when photographing white subjects?

When spot metering white subjects (e.g. snow, white birds), do I adjust the EV on my camera + or - to get a proper exposure? I'm getting conflicting info.
2
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1answer
279 views

Why is my Canon EOS 40D getting wrong exposure after focusing screen change?

I have just changed the focusing screen; something I have done now a few times. Now "normal" metering does not occur in auto or manual focus. In live view all ok. Using the eyepiece produces exposure ...
15
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2answers
8k views

What is the difference between luminance and illuminance?

The more I read about this, the more confused I become. Illuminance, as I understand it, measured in lux, is the perceived brightness of light on a surface. It's what you'd measure with an incident ...
13
votes
6answers
2k views

Can you fix incorrect exposure during post processing?

If a photo is over or under exposed but not to the point of clipping (histogram does not reach the left or right side) is there any reason you couldn't just fix the exposure in Photoshop or Lightroom? ...
21
votes
4answers
4k views

How to photograph a room showing both room & view out a window?

I sometimes find I want to photograph a room showing the view outside the window. This is tricky — either you adjust the shutter speed so that the the window is so bright you can see no detail, or ...
2
votes
1answer
709 views

What is the relationship between film speed and shutter speed?

I'm doing my own research on film photography and planning to do it as a hobby. One question I keep is "what is the relationship between film speed and shutter speed?" Are the two completely ...
0
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0answers
60 views

Why does my flash have lower power in automatic than in manual? [duplicate]

I have a Sony HVL-43AM flash. I've found that when I'm in automatic mode, when I dial the flash exposure compensation to -2EV I was able to get a much weaker flash than if I went manual with the flash ...
0
votes
1answer
87 views

How is the exposure of this histogram? [duplicate]

Is exposure correct for this luminance histogram? What does this say about the dynamic range of the scene? The link is here below. It's the graph with dots. http://tinypic.com/r/b85mkj/6
6
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2answers
558 views

What is bracketing?

I have seen this term a lot and I was wondering what, in basic terms, what bracketing/autobracketing is. Also, why would one want to 'bracket'? P.S. - there are other questions asking what DoF and ...
6
votes
2answers
3k views

How do I take automatically bracketed exposures with the Canon XSi?

I'm trying to help someone with a Canon XSi. I'm not used to the Canons that use menus (rather than buttons on the body). Does anyone know how to set up the Canon XSi to take a bracketed exposure of ...
4
votes
5answers
3k 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 ...
3
votes
3answers
447 views

Why don't professional cameras have a preview for shutter speed in live view?

So far, I have been taking my pictures with a Sony F717 (a dinosaur of digital photography). Nevertheless the F717 has a nice preview feature for shutter speeds. Up to 1 sec, it simulated nicely the ...
1
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1answer
336 views

Does Canon PowerShot G15 have manual F-number adjustment

As the question says, I have not been able to find out whether Canon PowerShot G15 has a manual F-number adjustment. I went through some reviews and specs but I haven't seen this there. I'm asking ...
0
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3answers
475 views

Why did my northern lights pictures turn out totally black? [duplicate]

Trying to shoot northern lights, able to see images in my view finder eye piece, dark on live view and the pics turned out totally black. I used ISO 800-1000, 8 sec, F3.5 manual mode.
3
votes
1answer
106 views

Why do some polarizers transmit more light then others?

How do filters such as the Singh-Ray LB Polarizer transmit more light then other circular polarizers? I am particularly interested in this technology because they claim to only add 1-1/3 stop to the ...
0
votes
2answers
386 views

AEB on the Canon Rebel T2i

Hi I'm new to this whole HDR scene and I actually have a few questions regarding this. I was trying to take RAW photos with my camera set to AEB on -2, 0, and +2 exposure today with continuous shot ...
0
votes
1answer
105 views

Guide number and exposure [duplicate]

I am having a bit of a difficulty calculating this. Guide#= 32 feet at ISO 100 X sync speed= 1/250 Min ISO= 100 Max ISO= 800 What exposure values to expose to capture subject that's far away? What ...
4
votes
4answers
322 views

When is it realistic to take a non-flash picture of someone outside after sunset?

This is a question from a non-photographer. I'm writing a scene for a stage play. In my scene, there's a celebrity in crisis in a park after sunset and a photographer who'd dearly like to get a ...
15
votes
4answers
4k views

How can I simulate a long exposure photo using a set of shorter exposure photos?

I'm shooting towards the sky to capture the stars. The exposure time is 15 seconds, so I can see the stars still, without a trace. These photos are taken continuously one after the other, because I ...
0
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6answers
141 views

Should I use EC when all details are captured?

I took this picture after looking at the histogram from my camera. Supposedly the details of the main object at the center was not clipped, but it is surely too dark to see it clearly. So i used ...
11
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6answers
559 views

Are meteors dim?

I was out last night trying to shoot the Geminids meteor shower. I was using a Canon 5D2, 17-40mm f4.0 lens set to 17mm and f4.0, ISO 400. The camera was mounted on a non-tracking mount (only because ...
3
votes
7answers
729 views

Can ISO vary on different cameras?

We all know that [ISO] + [shutter speed] + [aperture] = a great picture. Now, let's take two different (very!) cameras: Nikon D3100 vs Nikon D800 and set them on Aperture priority. Settings for the ...
17
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5answers
2k views

If shooting RAW, is the white balance selected in camera irrelevant for exposure?

I have read the existing question - Does the camera white balance setting affect the raw image at all? After reading the above post, I am still not clear on the part around exposure. Is it possible ...
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4answers
438 views

Why doesn't my camera capture a dark picture when it looks dark to the human eye?

I tried searching for this, but found nothing on this topic: is there a way to set the camera to get images in around the brightness a human eye sees? For example, in bright daylight, I would set it ...