can i step up from a 62mm to a 77mm lens ring? and stack the adapters?
A
yes you can stack the adapters and do that.
Q
What is the minimum interpupillary distance?
A
The minimum interpupillary distance for the TrailSeeker ED 8x42 binocular is: 56mm (2.20")
Q
What is the difference between the 8x42 and 8x42 ED? Will strictly be birdwatching with these.
A
I own the 8X42 and they are very good for bird/wildlife watching. The 8X42 ED- Extra Low Dispersion model may be a higher quality lenses system, but I have been very happy with the pair that I have. Very clear and sharp images.
Q
Is the 52mm fits 50mm canon lens?
A
There are 7 filter ring adapters, included 52mm/ 58mm/ 62mm/67mm/ 72mm/ 77mm/ 82mm, allows you use the nd filter on your kinds of size camera lens.
Q
Does this mounting system support a CPL filter?
A
There are 7 filter ring adapters, included 52mm/ 58mm/ 62mm/67mm/ 72mm/ 77mm/ 82mm, so it support a CPL filter.