Which Nagler is better for binoviewing

16mm type 5 vs 12mm type 4. I prefer the 1.25" barrel of 16mm type 5 than the 1.25"/2" barrel of 12mm type 4. But the latter has longer eye relief.
What do you think? Thanks for any comments.

Jianhua Chu

Jianhua,

What scope do you have? The magnification on a 16T5 and a 12 T4 could be very different depending on the focal length of your telescope. I'm sure you know that, but it would help us.

Clear skies,

TOm