10-07-2009, 01:21 AM
This is something we hardly ever think about. Light Transmission.
Given 2 lenses a zoom and a prime at the same focal length and same aperture, the prime will usually transmit more light through the lens and hence, a faster shutter speed. This is not always the case, but in most cases, I guess.
http://www.cctv-information.co.uk/i/Ligh...ugh_Lenses
![[Image: Constant55.gif]](http://www.cctv-information.co.uk/w/images/a/a3/Constant55.gif)
Given 2 lenses a zoom and a prime at the same focal length and same aperture, the prime will usually transmit more light through the lens and hence, a faster shutter speed. This is not always the case, but in most cases, I guess.
http://www.cctv-information.co.uk/i/Ligh...ugh_Lenses