Pentax XF Zoom Spotting Scope Eyepeice for PF-80ED PF-80ED-A PF-100ED. PF-65ED and PF-65ED-A
http://www.amazon.com/gp/product/B000A0YKNS?tag=sukses2015-20
Focal-length range of 65mm to 195mm
Magnification of 20 to 60 times
Apparent Field of view of 42 to 60 degrees
Eye relief of 11mm to 15mm
