Linked Questions

2 votes
5 answers
3k views

Why do lower f-stop numbers mean larger apertures? [duplicate]

I thought this would have been asked before but it seems not. I don't understand how f-stops are numbered. From what I read, the lower the f-stop number, the larger the aperture. That is, f/2 is ...
CodyBugstein's user avatar
1 vote
4 answers
167 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 ...
Gerald M's user avatar
7 votes
3 answers
1k views

What is it called when aperture and exposure are previewed on the LCD screen before the shot is taken?

I have a Canon PowerShot SX120 IS. I would like to get a better comparable camera, but the singular feature I love the most about this camera is when in Manual mode, I scroll through shutter speed ...
Jason's user avatar
  • 71
2 votes
1 answer
15k views

calculating aperture and shutter speed inversion [duplicate]

I'm taking a manual photography class, using my canon rebel t5. Any tips on how to calculate aperture and shutter speeds easily? (I know they have to be inverted). After I meter my photo (set at -0-)....
AngBrammer's user avatar
-1 votes
2 answers
2k views

What F means in lenses and how to find focus distance [duplicate]

I've found some camera sensors with very low resolution to use with electronics. Camera have 150x150px and can mount different lenses type: F2.7, F4.0, F6.0. I want to ask what F means and if I can ...
Singee's user avatar
  • 101
6 votes
4 answers
3k views

Why do camera manufacturers stick with the same awkward control layout imposed by film cameras? [closed]

You could replace the full set of controls with some much more intuitive and integrated click-wheel or touch-screen controls. But a good chunk of photography classes (my wife has taken a few courses) ...
WillC's user avatar
  • 197
0 votes
1 answer
455 views

Convert leica-m to c mount? Ideal lens for low light photography?

We are using a scientific camera which has c mount. We are dealing with very low light conditions so we are going to need to use a fast lens with large aperture. The Leica Noctilux-M 50mm f/0.95 seems ...
Adam's user avatar
  • 101
0 votes
4 answers
704 views

How do you exercise depth of field in practice?

I'm really frustrated because many of my nicely framed photos are of poor technical quality, mainly because of the wrong depth of field or subject being out of focus. I always thought I know theory ...
dzieciou's user avatar
  • 533
2 votes
1 answer
273 views

How can I set up an off camera flash using the reading from the light meter?

I want to be able to blend ambient light with fill in flash, using off camera flash in manual mode. I don't understand how to translate the information from the light meter into settings to input into ...
Andy's user avatar
  • 53
1 vote
1 answer
292 views

Where can I find tables of common shutter speed and aperture values? [duplicate]

I'm working on image processing software (mind that I'm a programmer and when talking about photography, I'm "tabula almost rasa"). In this software, I'm using a RAW decoder that returns a data ...
mishan's user avatar
  • 252
0 votes
2 answers
13k views

How is f-stop a measure of dynamic range?

As far as I have read f-stop is a measure of the aperture. This affects the amount of area in the foreground and background which is in focus. While having a look at the dynamic ranges of cameras I ...
jinkx's user avatar
  • 103
1 vote
3 answers
2k views

How is the F stop number derived?

How are F Stop numbers derived? I have both a Canon 50d and a Panasonic DMC-LZ8k, a compact with full manual mode. When I set all settings but shutter speed identically between cameras, I end up with ...
Evan Pak's user avatar
  • 1,272
8 votes
6 answers
6k 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 ...
BartoNaz's user avatar
  • 183
5 votes
2 answers
343 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 ...
Imre's user avatar
  • 32k
32 votes
2 answers
27k views

What is T-number / T-stop?

Usually, when discussing aperture of a lens, F-stop and F-number are used for quantifying. But some photographers, and especially videographers, also mention T-stop. The concept and numbering used (e....
Imre's user avatar
  • 32k

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