A very good diagonal mirror for telescopes with 2 focuser and for the BRESSER Messier telescopes with a 2.5 - HEX focuser. Enables the use of eyepieces and accessories with 2 barrel, so that a wider field of view can be reached. A larger light beam and a comfortable observation position is achieved by this 2 inch zenith mirror. Especially for use with refractors and for zenith observations a useful accessory. The clamping ring is made of brass, so there will be no scratch marks on your high-quality eyepiece. The precise clamping is another advantage. The BRESSER 2 Diagonal Mirror is completely made of metal and has a very accurate flat mirror. The dielectrical coating delivers a 93% reflectance and is very durable against enviromental influences. FEATURES - Star diagonal mirror for focuser with 2 barrel - High quailty flat mirror - Dielectrical mirror coating delivers a 93% reflectance - Very durable against enviromental influences- Eyepiece adapter 1.25/2.0 inch included- Brass eyepiece clamping ring - Housing completely made of metal - Dust caps included SCOPE OF DELIVERY - diagonal mirror- eyepice adapter 1.25/2.0 inch - dust caps With adapter for 1.25 eyepieces Dielectric coating with 93% reflectivity Ring clamp protects accessories Brand BRESSER Mount Tripod Mount Coating 93% Reflective Coating Focus Type Manual Focus Model Name Messier 2 Series Zoom Ratio 10x Item Weight 0.51 Kilograms Manufacturer Bresser Model Number 4900900 Power Source Battery Powered Field Of View 3 Degrees Compatible Devices Eyepieces Focal Length Description 10x Manufacturer Part Number 4900900 Item Dimensions D x W x H 2.48 D x 5.71 W x 3.94 H Eye Piece Lens Description Barlow