Jim, I'm betting you'll be happier with the 31mm because of the smaller exit pupil (5.8mm). The 41 would give you just a tad bigger field but with an exit pupil of 7.6mm you're wasting light. If you do the pepsi challenge with the 41mm I bet you'll notice that the 31 has better contrast and more resolution. Cheers, Dave On Thursday, October 14, 2004, at 08:54 AM, Jim Gibson wrote:
My lowest power, the 31mm Nagler, gives me 85x with a 0.97 degree FOV. My highest power is a University Optic Ortho at 4mm which gives me 685x with 0.07 degree FOV; things move fast through there. A 41mm Televue Panoptic would give me 64x with 1.06 degree FOV - I feel the tug of a purchase coming on, but I am not sure it would give me that much more. I will have to see if I can barrow RichÂ’s sometime for a peek.