set content BT81S-A lens barrel Eyepiece HF2 HF general -purpose plate SXG-HAL130 Trial- [Large barrel] Effective diameter 81mm/Acromart, magenta coat Focal length (caliber ratio f) 480mm (F5.9) Resolution/Extreme grade 1.43 seconds, 11.3 stars light -collecting power 134 times the naked eye Size/Weight Length 480mm Width 190mm height 155mm 4.1kg Eye width 58-102mm Finder Alimizo type pedestal attached (sold separately) [Eye portion] parts mounting size plug/31.7mm eyepiece lens ( * Note) (31.7mm diameter) SLV20mm x 2 pieces (24 times, 125 minutes of real view) [Standing part] Type type HF2 Subcommittee Up, down, left and right Up, bottom, left and right free stop, hardness adjustment mechanism Weight about 3.4kg [Syuji] Material/Former Large hexagonal aluminum 2 -step extension (one touch type) Size/Weight Length 807⇔1,299mm height (ground height) 730⇔1,156mm installation radius 460⇔ 706mm 5.5kg [Others] Photography Photography cannot be taken Observation of the sun Not possible Total weight 14.1kg (optional eyepiece lens) ( * Note) The "BT81S-A lens barrel" can be used in 31.7mm diameter eyepieces (however, Lv8 to 24mm, NPL cannot be used) . [If you use a high magnification eyepiece lens] The "BT81S-A lens barrel" can change the magnification by replacing the eyepiece lens, but due to the structure, when using a high-magnification eye lens, the optical axis may not match.please note.For eyepieces to be used, we recommend those with a focal length of about 10 mm or more (medium / low magnification). * Finder sold separately XY spot viewfinder or 50mmXY viewfinder leg (L) can be used with a dark viewfinder 7 times 50mm. Warranty period 5 years warranty from the date of purchase Instruction Manual