I found a US blog where a Leupold rep apparrently stated a vxiii 3.5-10*40 would have a brighter image than a vxiii 4.5-14*40 set on the same magnification. Extra lenses therefore have a reducing effect on light available to the eye.
I wonder how much better resolution a FX 6* 40 scope has than a 2-10HD*42 has on 6*?
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