Linked Questions

67
votes
4answers
149k views

What does f-stop mean?

What does f-stop mean? Is it the same thing when people say "2 stops" for example?
26
votes
6answers
3k views

What is ETTR (Expose To The Right)?

Picking up from this answer and this question, What exactly is ETTR? How it may reduce the image noise? And how is it difference from film to digital sensors? In the answer linked above, what are the ...
12
votes
7answers
2k views

Can someone give a simple explanation of ISO?

Can someone please explain to me what ISO means in the camera settings? In an answer to a question about taking pictures at a dance party, I was told to use ISO 1600. What does that number really ...
11
votes
4answers
15k views

What is the EV scale?

I have seen an "EV" (exposure value) scale that's sometimes used to express a camera's exposure settings, or scene brightness. How exactly does this scale work?
11
votes
4answers
2k views

What filter should I buy if I wanted to do 5 min shutter speed in daylight?

What type of filter would I need to create an image such as the following: http://500px.com/photo/10158205
10
votes
4answers
567 views

Are the aperture, ISO and shutter speed stops perfectly interchangeable?

Imagine you have an scene with shutter speed 1/60, f/8 and ISO 200. Then you change the configuration to get an equivalent exposure: speed 1/120, f/5.6, ISO 200 (plus one stop in speed, minus one stop ...
9
votes
4answers
6k views

What is the relationship between ISO, aperture, and shutter speed?

I know digital cameras have ISO options, and that ISO is the camera's sensitivity to light, but if you set higher ISO then you can get a noisy image. I also know there are two other camera options, ...
9
votes
4answers
9k views

How do I manually calculate fill flash?

My main flash is a Nikon SB-24, used on a Nikon D200. Hence, iTTL doesn't work. I've had no issues using A-mode (the thyristor in the flash determines flash output) or M-mode (manual on the flash) ...
8
votes
2answers
2k views

What are the practical differences between the exposure settings my camera picked for me in auto mode and my own choices?

I were using Fujifilm x-t20 and I took two photos: one with 'Auto' switch on and the other with 'Auto' switch off. I compare the two and I cannot find noticeable difference. and the settings Here ...
8
votes
2answers
8k views

What does “N stops” mean when describing an image stabilizer?

If you ever purchased any lens with IS then you have heard this term like "3 Stop Stabilization" or "4 Stop Stabilization". Now, I am familiar with this Stop for ISO and Aperture. But this I don't ...
7
votes
3answers
8k views

How do I correctly expose a 3200 ISO film roll on a camera that allows 1600 ISO?

I just bought a 3200 ISO film roll (ILFORD DELTA 3200), and my camera (Chinon Cm-5) allows to set films up to 1600 ISO. What can I do to expose correctly? I thought of metering at 1600 and when it's ...
7
votes
1answer
5k views

What are STF lenses?

What are STF (smooth transition focus) lenses? How much do they differ from other fast lenses? What artistic techniques are done with them? For example Sony has an a-mount 135mm F2.8 [T4.5] STF. What ...
6
votes
5answers
5k views

What reduces blur from camera movement more: large aperture or image stabilisation?

In the reviews of lenses with image stabilisation systems there are quite often written the quality of its performance represented by the number of f-stops (2-4 f-stops). As far as I understand, it ...
6
votes
2answers
12k views

How much additional light does an f2.8 really let in?

I currently have the Nikon 18-55mm kit lens that came with my D3100, but I am looking for something that will let more light in among the entire focal range. I have been eyeing the Tamron 17-50mm f2.8 ...
5
votes
4answers
735 views

Do flash guide numbers assume some amount of ambient light built-in?

My flash shows its potential range in meters, but is that indoors or outdoors? The question came up the other day when I was trying to work out whether fitting a diffusion dome would be suitable for ...

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