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The means by which a camera automatically determines exposure settings such as shutter speed, aperture, and ISO (sensitivity).

learn more… | top users | synonyms

7
votes
3answers
181 views

Why do I meter under the chin with a lightmeter?

Every single tutorial or video has advised to meter for a portrait right under the chin. First of all why? If the face is the most important part, wouldn't you meter right at the face? Secondly, I ...
1
vote
0answers
20 views

Lightmeter not changing values after adjusted flash power?

This is my first time learning to use a light meter. Measuring ambient seems to be working and straight forward. However measuring the flash seems to be broken. I have it set to wait for a flash. ...
1
vote
0answers
22 views

How to adjust power on Yongnuo-14 EX Macro flash ring and Yongnuo 560 slave?

I recently purchased the above item and I am ready to toss it in the trash! Why? Because the directions that come in the manual are NOT for camera rookies. Terms I don't understand, etc. However, all ...
5
votes
2answers
163 views

How do dedicated light meters account for light transmittance?

Dedicated light meters seem to be well-regarded for their versatility and accuracy of metering. What puzzles me about them is how can they account for the different light transmittance of different ...
17
votes
5answers
11k views

How well do smart phone light meter apps work?

There are a number of smart phone apps which use the phone's camera as a light meter. How well do these work? The metering built into most modern cameras is very powerful and accurate, but in some ...
9
votes
3answers
2k views

Metering - How to account for the light from the flash

I pretty much use Manual mode (in my Nikon D40) and learning quite a lot from it. Though I understand "Metering" for correct exposure, I've trouble understanding it while using Flash (both in-built as ...
2
votes
2answers
119 views

How does a camera meter light when the shutter is closed?

I have read when we check the image from viewfinder, we can set the aperture, shutter speed and ISO based on the light coming through the shutter. But, only when we click the shutter release is the ...
8
votes
5answers
744 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 ...
1
vote
1answer
124 views

How do analog photography light meters work?

I have a Canon AE-1 film camera. It works well and I've several FD, FL and Vivitar lenses. For recent digital cameras, I know how the light meter works. However, with this old camera, I would shed ...
2
votes
3answers
117 views

Does a good light meter eliminate the need for exposure compensation?

I am new to photography but have a fairly good understanding of exposure. I know the camera's light meters are easily fooled and hence the need for exposure compensation where a photographer have ...
2
votes
2answers
245 views

Which metering mode is best for portraiture using a white background?

I was wondering whether its best to use spot, centre weighted or matrix metering for portraiture when using a white background. It feels like it could be better to use spot or centre weighted to make ...
9
votes
3answers
500 views

Why are exposure settings different while using different lenses under the same lighting conditions?

I was shooting a scene, using a Canon 28mm 1.8, and after a few seconds I switched to a Canon 100mm 2.8, and the in-camera meter was suggesting different exposures! Why does this happen? Is this ...
3
votes
4answers
856 views

Can different metering modes affect sharpness for a m42 prime lens?

Recently, I got some old m42 prime lens from Ebay and started playing with them with my Canon T3i/600d. However, it's difficult to get sharp pictures with these manual focus lens as there is no AF ...
2
votes
2answers
128 views

Why is my camera metering indoor scenes as darker than I expect it would?

I am shooting in natural light, with my subject facing a full floor-to-ceiling south facing window. You would think my meter would allow ISO between 200-400 in bright light, but I was lucky to get it ...
7
votes
1answer
185 views

How to select a light meter?

I'm looking for a light meter to use with an old film camera that doesn't have a working meter, and the bevy of options with prices all over the place is a bit overwhelming. I'm trying to narrow down ...
7
votes
3answers
757 views

Is center-weighted metering a type of spot-metering?

Does center-weighted metering use the same camera/lens adjustments as spot metering with the exception of the focus which is in the center? Or is there a technical difference in the way ...
0
votes
2answers
209 views

Why is my Canon 7D light sensor under-sensitive?

It seems the light meter indicator in the viewfinder on my Canon 7D underestimates how bright the picture will be. This makes for overexposed photos whenever I use anything other than full manual ...
0
votes
2answers
107 views

Should I always use point-autofocus and spot metering while shooting a small restless bird in a bush?

I am a beginner and I am finding more and more images to be out of focus or grainy when viewed on a computer screen, compared to the camera LCD. Could anyone give a step by step listing of the ...
1
vote
3answers
127 views

Effect of Metering on Captured Image

I've been using the advanced metering modes on my Canon EOS 7D (and also on an XSI I owned previously) for several years now. I had always assumed that the purpose of the different metering modes was ...
8
votes
5answers
2k views

How can I work around metering issues with adapted lenses on a Canon DSLR?

I have a bunch of Contax lenses (C/Y mount) and a mount adapter with "dandelion" chips. This should allow me to use my lenses on any Canon DSLR using aperture mode and stopping down the lens. Thanks ...
4
votes
3answers
869 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 ...
1
vote
1answer
2k views

When to use different combinations of TTL/TTL-BL and Spot/Matrix metering?

I am trying to teach myself flash photography, and I am currently confused about metering modes. In what shooting conditions would each the following metering modes be best-suited? (And why do they ...
-1
votes
1answer
214 views

What would be an accurate light meter app on Android? [closed]

This question was 2 years ago and it talks about light metering apps for smart phones. Can someone suggest a good (accurate) light meter app for Android (specifically Google Nexus 5)?
7
votes
5answers
317 views

Will metering from a DSLR apply to a film SLR?

I still like to shoot with film (I use a Nikon F3) but I like the immediate feedback of digital. I'm thinking of buying a used DSLR to help me get the framing and lighting right when I shoot static ...
1
vote
5answers
272 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 ...
4
votes
2answers
249 views

Why not expose for a cloudy day as a cloudy day?

We all know how cameras try to meter the scene as if it is 18% gray. That's why we should dial in +1 or even more when shooting on a snowy day and -2 for a night scene. What about a cloudy or ...
1
vote
2answers
159 views

Why will low-end Nikons not meter with old lenses?

To quote the source, the following sites claim that the Nikons: D90, D5200, D3200 and so on will not meter with AI lenses. http://www.aiconversions.com/compatibilitytable.htm ...
3
votes
4answers
495 views

P-Mode on Nikon D5100: What are some use cases?

I am using D5100 for around 6 months. I have basic ins-n-out understandings of the camera including A/M/S-mode. In, most scenario, i understand what to use. Else, figure it by trial-n-error. But, in ...
3
votes
2answers
488 views

How to relate LED Lumens to Lux at a given distance?

I'm trying to design an LED light, but I'm not sure how many LED's I need for a given light level. Specifically, the Luxeon LXR7-RW57 1000 lumen white LED (data sheet) Q: How many lux should I see ...
13
votes
7answers
543 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 ...
0
votes
0answers
38 views

Finding the actual size of an object in an image [duplicate]

This is more of a programming related question rather than with device related . Is there any command line utility that will help me to find the actual size of an object in an image . ...
4
votes
5answers
493 views

What are the easiest (and best) solutions for avoiding a blown out background for a portrait?

Blown-out backgrounds seems like one of the more common issues amateur photographers deal with, and probably one of the things I struggle with most. Metering modes seem more of a compromise between ...
2
votes
2answers
294 views

How do metering and aperture setting play together in manual mode (Minolta X-700)?

I have been playing around with my mother's Minolta X-700 (objective: Minolta MD 50 mm f/1.7) and though I read the manual (here it is: Manual X-700), I am still unclear about one thing: When I use ...
2
votes
2answers
342 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 ...
4
votes
2answers
316 views

Can a grey card be used in place of a flash meter?

I've been trying to improve my flash/studio skills. Googling around, I see that some tutorials use a flash meter to set ratios, two stops for white background... I'd rather not buy another piece of ...
2
votes
1answer
221 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 ...
14
votes
2answers
6k 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 ...
2
votes
4answers
651 views

How to meter for manual bounce flash?

I use a Yungnuo flash in manual mode. I use it mostly indoors, so I bounce the flash off the ceiling. What is a good approach to read the camera metering and make adjustments to flash intensity? My ...
17
votes
4answers
11k 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 ...
1
vote
4answers
333 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 ...
1
vote
2answers
589 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 ...
10
votes
2answers
403 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. ...
7
votes
3answers
1k views

Metering strategies for time lapse

In short, my question is: what are the best metering strategies when shooting a time lapse sequence to avoid visible fluctuations in brightness? I'd like to make the day-to-night transition look ...
12
votes
4answers
4k views

How should I learn to understand Canon's metering?

Spot metering is my preferred metering mode on the Canon 50D. This allows me to nail the exposure first time -- 99% of the time -- by using AE-lock on my subject and applying the desired amount of ...
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- ...
13
votes
8answers
642 views

What exposure mode and techniques should I use when out-and-about?

I'm interested to hear what exposure/metering techniques people use when taking out-and-about shots (no tripod). I almost always have my camera set to Aperture Priority mode, and I suspect most people ...
3
votes
2answers
195 views

How do i set studio flash power for a film camera without TTL/OTF metering

I have just bougnt an old fully manual medium format camera to play with, nothing serious. anyway on the lens there is a flash attachment point, which got me thinking: How do i decide on flash and ...
4
votes
2answers
257 views

Do point and shoot cameras have a metering sensor?

I have a Pentax point and shot camera and I tried to convert it to Infrared. I was successful to remove the front IR filter from CCD and then I had a 760 nm IR filter to kick start with the infrared ...
7
votes
1answer
320 views

What is the device held near the subject's face in this picture?

I have seen this device that is used widely in filmmaking. What is this device and what is it used for?
39
votes
5answers
4k views

When best to use Multi-Zone/Matrix, Spot, or Center-Weight?

What are Multi-Zone/Matrix metering, Center-Weighted metering, and Spot metering? What about Partial? Is there a good rule of thumb, or a few pointers, on when best to use each metering mode?