Author: koshkin
Subject: Are some 6mm exit pupils brighter than others?
Posted: January/03/2016 at 15:34
Subject: Are some 6mm exit pupils brighter than others?
Posted: January/03/2016 at 15:34
 Shenko wrote:The 42mm objective has 3 times the surface area of the 24mm. If you are in dark conditions, and the eye is adapted to the dark and the pupil of the eye is dilated to 6mm, 3 times as much light will be transmitted to the eye by the larger scope. That means that you will be able to see a deer when it is darker out. |
That is largely true, but not 100% accurate, since the scope set to higher magnification is collecting light from a smaller FOV. While it has a larger objective lens, the energy density incident on that lens is lower.
ILya