Years ago I had a buddy with one of these monstrosities.
They mount too high to give good cheek weld to the stock, so often accuracy suffers. That was about 15 years back, and the scopes were of middle of the road quality back then, coatings and quality of optics have imporved in the last 15 years, 56 mm objectives are not needed in Alberta, typically if you can get mid to high 90%'s in light transmission and a 4.5mm exit pupil, your good for anything that will occur in the 30 minuite window following sunset same at sunrise.
For light transomission see the manuf's information.
For exit pupil, simply divide the objective lens diameter in mm's by the power of the maginifcation, and you will get the exit pupil size. eg, 9 power and 40mm objective (40/9= 4.44mm)
Typically the human eye can only dilate to about 5mm, so any exit pupil beyond 5mm is wasted objective lens diameter.
__________________
There are no absolutes
|