tr0gd0o0r said:
I feel like a real moron asking this, but i've noticed that all <a href="http://0-2u.com?go=cameras" onmouseover="window.status = 'goto: cameras';return 1" onmouseout="window.status=''">cameras</a> have different f-stops and aperture settings. I was wondering what exactly 1 stop is defined as. I assume that adjusting either aperture or shutter speed one "click" one be a stop, but some of my <a href="http://get-faster.com?go=cameras" onmouseover="window.status = 'goto: cameras';return 1" onmouseout="window.status=''">cameras</a> have different settings so how does that work?
One stop is a halfing or doubling of the amount of exposure.
Standard apertures in one stop increments are f/: 1, 1.4, 2, 2.8, 4, 5.6, 8, 11, 16, 22, 32, 45, 64, 90, 128, 180, 256....
Manual focus SLRs usually had 1/2 stop clicks between these numbers on the aperture ring on the lens. Modern AF SLRs run everything on their fancy computer brains, eliminating the need for a standard, therefore you can see many "odd" f/stop numbers displayed in the viewfinder; they just do the math for each setting (focal length divided by aperture size in mm equals f/stop).
Standard shutter speeds in one increments are 1 (1 second), 2 (1/2 second), 4 (1/4 second, etc...), 8, 15, 30, 60, 125, 250, 500, 1000, 2000, 4000, 8000, 16000....
Old time shutters sometimes had different speeds, but most <a href="http://get-certified.net?go=cameras" onmouseover="window.status = 'goto: cameras';return 1" onmouseout="window.status=''">cameras</a> built since the 60's had the above mentioned settings and maybe 1/2 or 1/3 stop clicks in between.