Samyang 800mm F8 Mirror Lens with T-mount adapter

Specifications

 

Detailed Specification of samyang 800mm F8 Mirror Lens 
Specification f=800mm / F8.0 Fixed Mirror Lens
Aperture Rang F8.0 FIXED 
Optical Construction 8 Element in 8 Groups
Angle of View  3
Minimum Focusing Distance 3.5m (11ft)
Filter Size M105.0XP=1.0(Front) / M30.5XP=0.5(Rear)
Length 144.5mm(MAX)
Maximum Diameter 111.0mm
Weight 946.4g
Mount T-Mount
Lens Coating Multi Coat