Linked Questions

13 votes
2 answers
622 views

Does focus breathing make a lens slower when close focusing?

I've heard that focal length of some lenses will become noticeably longer when focusing to a close distance, an effect called "focus breathing". Since f-number is focal length divided by diameter of ...
Imre's user avatar
  • 32k
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
1 answer
3k views

What does the F number in a lens name mean? [duplicate]

Possible Duplicate: What does the f-stop printed on the lens refer to? I understand that for a DSLR you can modify the aperture(the F number) to allow more or less light to enter the camera. But ...
Ryan's user avatar
  • 151
-2 votes
1 answer
5k views

How does aperture affect exposure? [duplicate]

I've heard that aperture can change the exposure, but I would like to know if this is true, and how it does it. P.S. I hope this question isn't dumb like my last two.
J. Walker's user avatar
  • 1,201
0 votes
2 answers
500 views

True or False: A two full F/stop change to either side of the starting F/stop will either double or half the amount of light from the original F/stop

Explain. A two full F/stop change to either side of the starting F/stop will either double or half the amount of light from the original F/stop.
user avatar
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
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
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
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
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
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

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