last update on 2023, April 8th

main instruments: • 1 GSO880 10inch Newton F/5 • 1 GSO 8inch F/8 (1624 mm) RC Ritchey-Chrιtien-Teleskop with carbontube • 1 Lunt LS80/560 H-Alpha (since 2018, April 19th) • 1 EQ 6 Mount with Synscan expansion (since 2011, May) • 1 Meade ETX70AT Refractor • 1 60/800 Tasco Refractor • 1 50/540 Carl Zeiss Jena • a do it yourself Refractor • 1 4x eyepiece revolver from CARL Zeiss Jena • 1 collimation laser from TS • 1 10x50 binocular • various eyepieces from Carl Zeiss Jena, TS, Meade and APM (Lunt) • various filter (moon / sun (10nch, 8inch), solar continuum / nebulae)   from TS, Astroshop and APM Telescopes camera΄s: • 1 TouCamProII 840K with sc1 modification • 1 Canon Power Shot S3 IS with canon programming • 1 Canon 1100D since 2012   (crashed during sun observation on 2022 September 3rd) • 1 Canon 1100D since 2022, September 5th • 1 Canon 1100D since 2023, February • 1 ASI ZWO 120 MC (since 2017, July) • 1 ASI ZWO 120 MM (since 2018, September 27th) • 1 ASI ZWO 120 MM mini (since 2019, January 27th) • 1 ASI ZWO 178 MM (since 2022, August 9th) • 1 ASI ZWO 178 MC (since 2023, April 5th) technical data of kleinfriesen observatory 48: • 80 cm foundation on frost protection,   pressed with heavy vibratory plate • insulated on that approx. 28 cm thick concrete (B25)   base dry of approx. 5 weeks • 7 x painted with grey concrete color • M8 Screw joint of the observatory external walls • M16 Screw joint of the telescope column • Weight of the GFK observatory (total) approx. 230Kg   according to manufacturer data of telescope column: Steel sheet 4cm x 30cm x 30cm as a bottom cover with 8 holes x 18mm diameter for fixing the base The column itself has aprrox. 2 cm wall and rolled steel with 125 cm is length above components became 2 welding seam at 115 A electrical with electrodes 2,5mm welded. 15 cm steel flange with connections to EQ6 Mount and rejuvenation turned for the column in that 3x 19 screw thread let in for the screw joint to EQ6 Mount and column on all components above. All screws with color Hammerit became a matt way black. Takes approx. 2 weeks to be hardened on the column. The power cable inlet is (3x1,5 mm² underground cable) filled up the column with approx. 1 bag game sand, in order to get still more stability on 2007 september 16th, i inserted a 10 ic coin (ten icelandic crown) on the sand at the inside of the column. The entire weight of the column and telescope is approx. 180 kg, according to configuration level! telescope data • 1 GSO 880 10inch Newton (14Kg) on EQ6 Mount with   17,5Kg counterweights an advice for the best picture quality: • self built main mirror cooling internal above the main mirror,   and external at the main mirror; • 1 viewfinder 8x50mm current main instruments (parallel mounted) since April 2018 • 1 GSO 8inch RC 8 / F/8 (~ 7,5 Kg) • 1 Lunt LS80THA/B1800 CPT ( ~ 4KG) • 2 viewfinder 8x50mm • both Telescopes mounted on EQ6 Mount with   12,5Kg counterweights