Quote:
|
Originally Posted by gama
With the image you took, it was taken with a 150mm (6 Inch) lens, not a cheap 60mm (2 inch) telephoto, so you cant really compare timing exposures.
|
Noise levels of an exposure at a given ISO of say 1/250th of a second does not vary with aperture. It will vary with temperature but whether it's taken with a 150mm lens, a 50mm lens the noise level will still be the same. If it did vary there would be no point in dark frame subtraction.