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Message: <blockquote data-quote="proudpapa56" data-source="post: 3533059" data-attributes="member: 104593">Cut and paste wouldn't include pictures so it's a bit choppy.BTX FACT SHEET March 2017 © SWAROVSKI OPTIK NA           Tripod base for Arca-Swiss system Current Tripod base until May 2017 BR SSR II PTH   with tripod plate Arca-Swiss system  with tripod plate Arca-Swiss system DH 101  with DH 101 tripod plate    with DH 101 tripod plate   BR  with collet     SSR II      BTX Ø 65 Ø 85 Ø 95 Magnification 30x 30x 35x Magnification plus ME 1.7x magnification extender 50x 50x 60x Effective objective lens diameter (mm) 65 85 95 Exit pupil diameter (mm) 2.2 2.9 2.7 Exit pupil distance (mm) 21 21 21 Field of view (ft/1000 yd) 112 112 96 Field of view (degrees) 2.1 2.1 1.8 Field of view for eyeglass wearers (degrees) 2.1 2.1 1.8 Field of view, apparent (degrees) 60 60 60 Shortest focusing distance (ft) 7.2 12.5 16.4 Diopter adjustment left/right ± 4 ± 4 ± 4 Diopter correction at ∞ (dpt) > 5 > 5 > 5 Interpupillary distance (in) 2.2 - 2.9 2.2 - 2.9 2.2 - 2.9 Length of BTX module* / BTX overall approx. (in) 6.9 / 14.6 6.9 / 15.9 6.9 / 18.0 Weight of BTX module / BTX overall (oz) 50.0 / 77.3 50.0 / 88.8 50.0 / 97.3 Objective filter thread M67x0.75 M87x0.75 M97x0.75 Tripod attaching thread 1/4” UNC / 3/8” UNC Special feature SWAROVISION technology Optical coatings: SWAROTOP, SWARODUR, SWAROCLEAN      Submersion tightness in ft: 4  Functional temperature in °F: -13 to +131     Storage temperature in °F: -22 to +158  Warranty SWAROVSKI OPTIK offers a lifetime warranty on the optical system of our products for products purchased by US and Canadian residents from an authorized SWAROVSKI OPTIK North American dealer. Once examined, if it is determined that the optical system is defective we will repair or replace the instrument or defective part. SWAROVSKI OPTIK warrants all other parts of the instrument for ten years from date of purchase against defects in materials or workmanship, subject to normal use. All non-optical products (i.e. accessories, tripods etc.) are warranted for two years from date of purchase.</blockquote>

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