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0
votes
1answer
51 views

about luminance and illuminance: what is the difference? [duplicate]

First of all, let me say that english is not my first language, so please excuse any mistakes that you could meet from here on out. I read several articles and explanations about luminance and ...
0
votes
2answers
220 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 ...
2
votes
3answers
247 views

How do I know how much light will be needed for a given film speed, shutter speed, and aperture?

For a given film type, shutter speed and aperture, how do I calculate the light needed to get a good exposure? For example, if I use a f/8 aperture, an exposure time of 100 ms and a ISO 800-film ...
18
votes
5answers
829 views

Why do two lenses with the same F-number give different amount of light?

Why do the following two lenses provide different amount of light? In both images we have fixed focusing distance, distance to the object, ISO, shutter speed and F-number.
3
votes
2answers
514 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 ...
1
vote
1answer
120 views

Do sensors absorb different spectrum of light at different rate, making longer exposures better for blue skies?

I've found one suggestion about taking photo of sky: The sky becomes white in ur photos unlike others who retain blue color?? - Stop down the aperture to f8 or more, decrease ISO to 100 and ...
1
vote
2answers
181 views

Nikon d3200 plus old Philips flash

A friend is shooting some photos at an indoors night event and he only counts on a Nikon d3200 plus a super old flash Philips P36 TSL. What would be the recommended shooting mode and shutter speed? ...
9
votes
3answers
257 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: ...
3
votes
4answers
372 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
559 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 ...
3
votes
1answer
629 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 ...
5
votes
4answers
958 views

How does one deal with too much light when taking a photo?

How does one cancel out extra light while clicking a photo? Is decreasing the aperture a better option, or using a faster shutter speed? What are other options we could try?
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 ...
12
votes
4answers
1k views

How to achieve pictures filled with light like these?

I would like to know how to achieve the effect of highly exposed pictures filled with light like the ones presented below: unknown source From http://dziecisawazne.pl/iza-faber/ Is this ...
12
votes
3answers
1k views

How can correctly measure light using a built-in camera meter?

Many times I shot photos, but the photo is some times too bright or too dark and the colors are incorrect. Some times the white on the photo is not the white that I have on background but gray and I ...