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 ...
1
vote
2answers
31 views
How large a brightness difference before it's noticable?
I'm being forced to work with a shutter that jitters -- and jitters quite a bit. I can't change the hardware, so please don't suggest that. I would if I could.
Say I need to take multiple photos of ...
3
votes
3answers
143 views
+100
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 ...
1
vote
0answers
14 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 ...
0
votes
5answers
193 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 ...
5
votes
1answer
107 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
75 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
93 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
145 views
What is the best order to set exposure parameters (ISO, aperture, shutter)?
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 ...
0
votes
5answers
242 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 ...
4
votes
5answers
594 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 ...
7
votes
5answers
255 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
votes
1answer
141 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 ...
12
votes
2answers
3k 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 ...
25
votes
8answers
4k 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
6answers
1k 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? ...
1
vote
3answers
238 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 ...
20
votes
4answers
1k 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
0answers
21 views
Will the camera compensate exposure anticipating for flash? [duplicate]
If I'm using TTL metering will the camera compensate exposure anticipating for flash? In other words, if I set my flash on fill flash and half click my shutter, what does my camera do? Does it
...
2
votes
1answer
85 views
Why is my Metz 58 AF-2 under exposing 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
107 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
56 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 ...
68
votes
6answers
3k views
How and why do you use an image histogram?
I realize that an image histogram is a graphical display of an images tonal distribution (i.e. horizontal darks to lights, vertical pixel distribution), but how does one really use it and why? I mean, ...
0
votes
1answer
61 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
39
votes
4answers
13k views
Tips for landscape+stars photography?
I'm leaving for holidays tomorrow, and there's a good chance that I'll be able to be by night on a field with no artificial light around, and no moon in the sky.
I'd love to take some picture of the ...
4
votes
2answers
228 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 ...
4
votes
2answers
1k 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 ...
1
vote
4answers
139 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 ...
7
votes
2answers
175 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 ...
4
votes
5answers
664 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
179 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
192 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?
1
vote
1answer
63 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
votes
3answers
313 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 ...
0
votes
3answers
220 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
91 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
192 views
What is the shutter speed, aperture, and focal length of a disposable camera?
Specifically, I'm looking at the Kodak FUNSAVER disposable camera. (http://www.amazon.com/Kodak-FUNSAVER-Disposable-35mm-Camera/dp/B00006HOBU)
Does anyone know what the shutter speed, aperture, and ...
0
votes
2answers
113 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
58 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
252 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 ...
13
votes
4answers
2k 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
votes
6answers
119 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 ...
49
votes
13answers
24k views
How do I set the proper exposure for nighttime moon photos?
All my attempts to get a good shot of the full moon with my DSLR result in an overexposed circle on a black background. I've used a tripod, remote shutter release, low ISO, and long exposure, but ...
1
vote
0answers
44 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 ...
10
votes
6answers
486 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 ...
16
votes
4answers
7k views
How do I “focus and recompose” using spot metering?
I usually use the "[auto]focus and recompose" method for taking candid photographs. In situations where there is a high degree of contrast, I would like to use spot metering to correct expose for ...
3
votes
7answers
277 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 ...
13
votes
5answers
851 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 ...
2
votes
4answers
234 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 ...
2
votes
2answers
183 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. ...
6
votes
2answers
102 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.
...
