
Originally Posted by
Error 404
My thoughts in no particular order:
1) Dollar for dollar, roofs will give you more chromatic abberation than porros. You need to get into the ED (Extra-low Dispersion) glass in a roof to be free from the CA.
2) You're sacrificing True Field of View (TFoV) going to an 8 x 42.
3) In my opinion, a 7 x 35 porro is an ideal woods glass. You don't need a lot of mag and a narrow field of view in the woods. Lower mag and WIDE field are your friends. If you're shore birding however, go with a 10 X porro and spotting scope.
4) The birding "pros" all seem to love 8 x 42 roofs, but they all use European glass such as the Leica. You probably don't want to spend $2K though.
5) Always consider the exit pupil of the binocs. Divide the objective diameter (in mm) by the magnification. Ex., 35mm / 7 power = 5mm exit pupil. This greatly influences the "brightness" of the glass. Larger your exit pupil, the brighter the image. Particularly helpful in low light.
That said, my two primary binocs are a Leupold 8 x 30 and a Pentax 10 x 50 (both porro). When I bird, I'm not lugging optics far from the car. I also have a small Nikon Travelite for tossing in the day-hike pack.
Good luck.
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