What others said - other considerations include contrast & resolution - it can be very bright but you may not get a satisfactory image to use eg see all the antlers/or the "v" bull if the scope lacks resolution and contrast. Swarovski had very strong UV filtration built in to their scopes - it had an odd "yellow" cast BUT it sharpened up images on overcast days very well and the apparent view was better than most other scopes. No good for bird watching but GREAT for hunting. More lens elements in the optical path will reduce light - most variables have more lens elements in the optical path. As already said new coatings are incredible and offset this somewhat. However if the external elements are covered in dirt and greasy finger prints - all of this is moot (or "mute" as my friends say!)
MUCH MUCH MORE IMPORTANT than brightness is the ability for a scope to maintain a secure reticle and provide for accurate (and secure) reticle adjustment when required. After all if the zero wanders - it really doesn't matter how bright the image other than you get a good view of the target you just missed.
rank needs as 1) secure/consistent reticle 2) contrast 3) resolution 4) brightness . This assumes that you are selecting from a group of scopes that meet the weight, exit pupil and magnification requirements for your intended use.
(the old ScopeChief 4 scopes can really amaze - particularly when you can find them for $60-75 used. You can pay 30 times that price and not see much improvement in image on an average hunting day! Maybe if you put it on an optical bench and ran a star test - but for the average guy - pretty darn good!! )
MUCH MUCH MORE IMPORTANT than brightness is the ability for a scope to maintain a secure reticle and provide for accurate (and secure) reticle adjustment when required. After all if the zero wanders - it really doesn't matter how bright the image other than you get a good view of the target you just missed.
rank needs as 1) secure/consistent reticle 2) contrast 3) resolution 4) brightness . This assumes that you are selecting from a group of scopes that meet the weight, exit pupil and magnification requirements for your intended use.
(the old ScopeChief 4 scopes can really amaze - particularly when you can find them for $60-75 used. You can pay 30 times that price and not see much improvement in image on an average hunting day! Maybe if you put it on an optical bench and ran a star test - but for the average guy - pretty darn good!! )




















































