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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
votes
2answers
102 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. ...
5
votes
2answers
315 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 ...
6
votes
3answers
537 views

Why is my camera so forgiving for overblown exposure?

I've found that my camera (Sony A99) is very forgiving in terms of overexposure when shooting in RAW. By that I mean, I can overexposure by a stop or so and when I get home for the post processing I ...
8
votes
1answer
503 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 ...
1
vote
1answer
548 views

Can't see exposure indicator in viewfinder on Nikon D7000

I can't see that - <---|---> + indicator in my viewfinder (I can see it only in manual mode and it used to be everywhere). I went through the whole menu and didn't find anything that may be ...
4
votes
2answers
141 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
724 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 ...
1
vote
5answers
4k 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 ...
0
votes
5answers
580 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
900 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.
4
votes
3answers
893 views

How do TTL flash metering systems calculate how much power is needed?

Does anyone know how TTL calculates the amount of power to put in after the preflash is done? I understand that the value is somewhat brand specific, but what is the general logic? Because if you ...
3
votes
1answer
425 views

Why is my Metz 58 AF-2 using long shutter values when my Canon 60D is in Av mode?

About one year ago I bought a Metz 58 AF-2 for my Canon 60D. Because of a lack of free time to experiment with automatic functions, I have used it only in manual mode with other manual flashes, ...
2
votes
1answer
386 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
votes
0answers
59 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 ...
21
votes
4answers
2k 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 ...
0
votes
1answer
86 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
1
vote
5answers
280 views

What exactly does TTL flash sets its power to?

I understand that TTL flash means the flash will preflash and try to calculate the right exposure for that particular scene. That part makes sense, but what exactly is the "right exposure"? Does it ...
12
votes
2answers
331 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 ...
1
vote
1answer
217 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 ...
3
votes
3answers
327 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 ...
2
votes
4answers
622 views

What is “Dragging the Shutter”?

Ive heard this term of "dragging the shutter" and was wondering what it means and why would i use it Can anyone answer this?
0
votes
3answers
378 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.
2
votes
1answer
227 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 ...
3
votes
1answer
103 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 ...
2
votes
1answer
1k views

What is the shutter speed, aperture, and focal length of the Kodak Funsaver disposable camera?

I'm looking at the Kodak FUNSAVER disposable camera. Does anyone know what the shutter speed, aperture, and focal length of this camera are? Are they fixed, or do they adjust automatically?
0
votes
2answers
203 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
91 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
306 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 ...
0
votes
6answers
136 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 ...
2
votes
2answers
237 views

How can I measure luminance values from different cameras?

Calculating EV and then Lx is pretty simple. The problem starts when trying to calculate these by using EXIF data that come from different cameras. I tried capturing a static object in the exact ...
6
votes
2answers
502 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 ...
1
vote
7answers
2k views

What could cause severe under-exposure when using a Canon 5D Mark III with Speedlite 600EX-RT with Evaluative E-TTL2 metering?

I recently purchased a Speedlite 600EX-RT for use with my 5D Mark III. I'm shooting with a 17-40 f4/L lens. Particularly when using the flash in the standard forward position, I get extremely severe ...
3
votes
7answers
555 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 ...
1
vote
4answers
340 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 ...
6
votes
2answers
136 views

How do objects in the dark come up when post processing?

I took one shot of oil lamps. Partial metering mode was used and I focused on the bright yellow light, as expected the image was captured with only the light and its immediate surroundings visible. ...
2
votes
2answers
714 views

How to picture thunder when storm is coming [duplicate]

Possible Duplicate: What technique and camera settings should I use to capture lightning strikes? My home town is very lack of thunders, but when time comes, I should be prepared to shoot. ...
1
vote
3answers
411 views

What's the difference between a closed and open aperture diaphragm for night street photos?

I'm capturing a picture during night and to a street with a lot of cars running over the street. What happens (in general, from a theoretical point of view) if I shoot the same photo under the ...
9
votes
1answer
276 views

Why doesn't noise depend on exposure time?

In the post Why do cameras use a single exposure rather than integrating across many very quick reads? an important question was if the noise depends on the exposure time or not. By noise I mean the ...
17
votes
7answers
618 views

Why do cameras use a single exposure rather than integrating across many very quick reads?

I have never understood why cameras need a shutter with a specific speed and why this cannot be adjusted in postprocessing. I think that present sensor works in an integral way: they save the amount ...
1
vote
2answers
631 views

When to use exposure lock with spot metering and when to use exposure compensation?

I was taking a snap on a sunny day, and the subject was in front of light source and subject was shadowed out(or blackened) In this case is it better to use partial/spot metering mode (zoom in to face ...
2
votes
2answers
603 views

Why does EV increase as ISO increases?

From what I understand, the lower the EV value, the more exposed (bright) the image is. EV decreases as aperture decreases. More light gets in with lower apertures. EV decreases as shutter speed ...
0
votes
3answers
229 views

Technical book about exposure

I am interested about studying exposure. I went through a few tutorial (as a beginner of DSLR photography) but I find them generally lacking of details. I have a background in engineering, physics ...
15
votes
4answers
732 views

Why do digital cameras need an exposure time at all?

From what I understand of digital cameras, they are basically a lens plus a tiny two-dimensional array of millions of photo-diodes. And from what I understand of photo-diodes, they create a voltage ...
6
votes
5answers
373 views

When determining exposure, is ISO typically taken into consideration secondary to aperture and shutter speed or is it equally as important?

In other words, do professional photographers typically pick the aperture and shutter speed they want and then after those are picked adjust the ISO until their exposure meter shows the shot as being ...
-1
votes
1answer
125 views

how to neutralise exposure in Manual mode [duplicate]

Possible Duplicate: How do I know I have the correct exposure when shooting in manual mode? I have a canon 550d, initially the settings were fine in Manual mode, but know I see following ...
10
votes
2answers
409 views

How can I expose a waterfall scene correctly?

Last day, I was photographing a waterfall. It was a bright day and I was shooting around 2-3 in the afternoon. I set aperture to f/11 and took the meter reading pointing camera towards the sky. ...
3
votes
4answers
1k views

D800 Previews Much Brighter in Camera, Very Dark When Rendered

I've been shooting with the D800 for about 6 months now, and I've noticed that the in-camera previews appear much brighter and more properly exposed. But when I load the RAW images into either ...
9
votes
3answers
260 views

How sharp of an image should I expect at night?

I'm a beginner with my first camera (sony nex6 mirrorless). I was trying my first few night shots Using the kit lens but I wasn't able to find a way to take sharp images. I've done the following: ...
11
votes
6answers
544 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 ...
2
votes
1answer
111 views

Synchronization problems with Rekam NEO 200 and Canon 600D

I've recently got two Rekam NEO 200 lamps with synchronization cable. To connect them to my canon 600D i've bougth an adapter. The flash seems to sync correctly when setting exposition to values ...