I am using Anschutz Match 54 rifle with 660mm barrel and trying to find the proper combination. (Planning to order 1913 with 690mm barrel)
I used to like the small and narrow front sight - using Centra High End Crystal inserts 3.2/1.0 and 3.4/1.0, but I've noticed that during the match as fatigue increases and/or at the evening I have problems with getting clear picture, especially with 3.2 - the ring kind of "melts" and tend to disappear..
So now I have found myself increasing the iris size, and ring size as well.
So is this true that small and narrow inserts work mostly for very sharp and fresh eyes? But after 100 shots at 8pm you could barely see it - as it blurs completely?..
I am thinking about Centra variable iris - e.g. 2.8-3.8 with the ring width 1.2. (I still don't like thick 1.6 or 2.0)
Also, do colored glass (they can be blue, yellow, red) or rear filter would help?
About the rear aperture - I also like the small one (it helps me to easily center front sight in it) - I have 0.9-1.6 variable aperture and I use 1.1 to 1.2 all of the time. My current eye relief is extra long - about 8 cm/ 3 inch (due to long stock, and sight cannot be moved back).
With air rifle when eye is almost touching the sight (~1cm) I decreased it to 0.9 but it still seems too large for me.
I am thinking about Centra Sight 1.8 Competition or Centra Sight 3.0 Combi -
first one is 0.8-1.8, with 10 colors filter and polarizer, and second is 0.5-3.5 with 5 colors and polarizer.
So which are the usual sizes for the rear aperture with normal (1-2 cm) eye relief? Should I get as little as 0.5 mm, or it's better to get 10 color filter?
Here I've tried to make a photo - this is 3.6/1.0mm insert on the slightly bigger than normal SCATT target.
I'd say it is looks fine for the camera, but for the eyes insert looks slightly smaller and narrower, and after some time ring starts to blur..
![Image](http://www.dianaserver.net/rasnoe/shooting/iris-3.6-1.jpg)