Is a Bigger Objective Lens Better?
Generally Speaking, a Larger Objective Lens Is Best If You're Going to Be Shooting at Higher Magnification. Your Effective Range Will Shorten Faster in Low...
.
Also to know is, what does a bigger objective lens do?
The objective lens is the light-gathering lens at the front of the scope. The larger the diameter of the objective lens, the more light will be admitted into the scope. This results in a larger exit pupil with a brighter image. Most riflescopes have objective lens diameters from 32mm to 44mm.
Secondly, does scope tube size matter? Tube Size Matters – But Not Much. Scopes built on 30mm tubes are inherently brighter, sharper and just plain better than those constructed on 1-inch tubes. Not really. If your scope's exit pupil is smaller than your pupil, it can't transmit all the light you can use.
Keeping this in view, is 50mm Scope better than 40mm?
a 50 mm is a little brighter than a 40 at the same power, and it will allow 1 power higher magnification to equalize with the 40mm. SO yes, a 50 mm is better than a 40mm but not a whole lot. And it will only be noticable in lower light situations. And it is only worth about 1 power setting.
What is the advantage of a 50mm scope?
So, for more flexibility with using higher powered optics especially in low light conditions, a 50mm objective lens is the best choice. Another benefit to having a large exit pupil is that you'll have greater flexibility to look through the scope and get on target in a hurry.
