I've been a fan of Zeiss optics for years. Including photographic lenses dating back to the '50's.
I was concerned about the 3.25mm exit pupil on the Zeiss 8x26 PRF rangefinder when viewing objects in deep shade. Although the 3.25mm exit pupil doesn't quite have the shadow detail that good optics with a 5mm exit pupil has, it is more than adequate. I attribute the optical performance to the lens coatings, optical design, and light baffles.
My one minor complaint is that the neck strap is a real pain to attach. It should come attached from the factory.
Pros: very good optics, small, light weight, simple to use
This review was written in the old system and had content requirements that are different than reviews written today.