Question by ochiba s: what does aperture size mean?
hi
i am in the process of a learning about cameras and lenses and faced by some terms. like
Max. Aperture Size:f/6.3; what does this mean?
Best answer:
Answer by olive.
google is your friend
aperture can be looked at as the almost ‘pupil’ of the camera: it sets the amount of light able to go into the camera.
the maximum the fstop in the aperture, the more light let in, like an f/1.2, and the minimum fstop, such as f/22, the least amount of light let into the camera and photograph.
also, the larger (actually speaking, ‘smaller’) the aperture, the blurrier the background is.
the aperture size of f/6.3 isn’t all that large, so it wouldn’t be that great for indoor photography, unless you’ve got some wicked strobes.
Know better? Leave your own answer in the comments!
Aperture refers to the f/stop number. It is the size of the opening the lens blades make. The smaller the f/stop number the larger the opening (and the more light that is available to reach the film/sensor).
For example: f/1.2 is larger than f/1.4>1.8>2.8>3.5…..>f/8>f/11…..and so on. So the largest opening the lens in your example is a f/6.3, which means that it will do ok in a well lit room or outside on a sunny day but would not do very well in a low light situation.
apeture is how much light is let in my the camera, which affects the sharpness of the image
This site will help you:
http://www.photonhead.com/beginners/shutterandaperture.php
the aperture is the part of the lens that can open and close to let in more or less light.
Aperture blades move to make a hole smaller or larger) the minimum is usually 22 – a very small hole.
6.3 is the largest size hole that the lens you’re talking about can make. (not very big, so it wouldn’t be a great lens for shooting in low light conditions since it can’t open wide to let in a lot of light. good low light lenses will have a max aperature of 1.4 to 2.8 (about the size fo a half dollar or larger.)
check out this image to help visualize how it works: http://www.scphoto.com/assets/images/aperture.gif
[the aperature size can also affect the focus and blur of a picture…if the light were coming through a pin sized hole, everything would be in focus. if you use an aperature of 1.4 things infront and behind your subject will very quickly go out of focus/blurry.]
The aperture/f-stop number is nothing moire than a mathematical ratio between the diameter of the aperture opening and the focal length of the lens.
Say you have a 50mm lens. If the Maximum aperture diameter is 25mm then you divide the focal length by the aperture diameter and arrive at f/2. Focal length divided by 2. This is a 25mm aperture opening. If this same lens is set to f/8, you divide 50mm by 8 and arrive at 6.25mm for your aperture diameter.
Say you now have an 80mm lens and you set it to f/8. This would mean your aperture diameter is 10mm. 80/8=10.
As to the same f/number on different focal length lenses, f/8 is f/8, regardless of which lens it is on. The aperture might be larger on a longer lens, but this merely means that more light has to travel further to reach the film/sensor. The f/number is just the ratio between aperture diameter and lens focal length.