Linked Questions

28
votes
10answers
82k views

What is an easy way to remember the full stop scale?

If you were teaching someone new to photography the full stop scales, is there a better way then flat out memorizing these values? Does anyone have an easy way that they remember the scale? Would it ...
11
votes
8answers
9k views

What is the fastest lens available for a DSLR?

I've seen references to f1.2 lenses. I was wondering, are there any faster lenses available for a DSLR mount?
34
votes
6answers
45k views

What is one “stop”?

I always hear this term, e.g., I had to go down one stop Increasing X by Y raises Z by one stop I turned down the flash/the light two stops This lens/sensor/strobe/Photoshop tweak raises X by around ...
7
votes
5answers
18k 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 ...
5
votes
5answers
2k 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 ...
57
votes
4answers
8k views

What is Ansel Adams' “Zone System”?

I've heard much of Ansel Adams' Zone system, but I've never quite understood it. What is it, how and where is it used, and is it still useful with modern (digital) cameras? Thanks!
11
votes
4answers
7k 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, ...
10
votes
4answers
600 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 ...
1
vote
4answers
163 views

Shooting film with a camera that doesn't have a ISO meter

So got a yashica J that doesn't have an iso dial or meter and I was wondering does that mean my camera is only limited to a set of film iso or that I can't push or pull the film
1
vote
4answers
117 views

how many f stops should I allow for a given change in focal length - ISO and shutter speed remaining constant?

There are charts that show me what how many stops in shutter speed or ISO to allow when, for example, using an ND filter but given that a longer focal length reduces light available is there a chart ...
13
votes
3answers
6k views

What is EV, when used as an absolute measurement?

I know there is already a question about EV, but it doens't quite answer my question. I understand EV as a relative measurement, 1 EV being one stop (doubling or halving the amount of light), but what ...
4
votes
3answers
275 views

If I have two ND filters both strong enough to get smooth blur in the way I want, is there a reason to pick one over the other?

If I have two neutral density filters (e.g. 5 & 10 stop) and the effect I'm after can be achieved with either (blurring of water/clouds) with differing exposure times using either, is there any ...
1
vote
3answers
2k 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 (...
0
votes
3answers
303 views

How to calculate difference in exposure between two given frames?

This question regards exposure. I have a project I am working on where I need to be able to calculate the exact number of stops between two given exposures, with the end goal being to match the ...
3
votes
2answers
3k views

What's the difference between real and effective aperture?

I understand that the simple idea that f-stop is focal length divided by aperture really applies to a simple single-glass lens, not the compound lens systems used to provide good image quality in ...
0
votes
2answers
450 views

What is the formula to calculate aperture (“diaphragme” in French)?

Let's say I have these data for my camera: t : Exposure time in seconds ("temps de pose" in French) C : Incident-light meter calibration constant ("constante lumière incidente" in French) S : ISO ...
0
votes
2answers
1k views

The best setting for Canon 70D for my application

I'm an robotics engineer and do not have any experience in photography. For a project, I need to take some pictures of some objects and need your experience to set the optimal setting because my ...
0
votes
2answers
171 views

How much light do I need for my RX10-II at 1000 fps?

I know the video mode is taking a frame "approximately" 1/1000s long, the aperture opens up to f/2.8, and the Auto ISO will select within the camera's range, 64-12800, so how much light (in the studio)...
4
votes
1answer
8k views

What does AF -0.5 EV sensitivity mean? Or -3EV in Canon 6D's case? [duplicate]

I know that it stands for Exposure Value, so my 6D focuses in 2.5EV worse light than a 600D. But it's relative to... what? What makes it meaningful? What's the "base unit" for AF sensitivity?
1
vote
1answer
279 views

How to use Pentax A3000 in dim lighting?

My Pentax A3000 doesn't have shutter speed control, only ISO and a few modes, B (bulb), 60 for flash, program, and aperture. I keep it on program, but what should I do if I want to shoot in darker ...
1
vote
1answer
1k views

Using a camera as Lux-meter

For a project I want to use a USB-camera (https://www.e-consystems.com/ar0330-lowlight-usb-cameraboard.asp) as a Lux-meter. I control the camera using v4l2 on Linux. I have a real lux-meter (https://...
1
vote
1answer
408 views

What is the -5 to +5 scale below the aperture number on the back of my Canon DSLR?

Hello guys, I am completely new on this photography world and honestly I don't have much knowledge about it, but I really want to learn... and read. I've been reading about modes, light, shutter ...
-1
votes
0answers
54 views

What is Exposure value [duplicate]

can you guys help me with understanding the basics about what is Exposure value and how to use that for better photography?