Telescope / Camera FOV Table / Backfocus

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Total 39.8
Slider: 17.5
a6000: 18mm t-adapter + spacer has to add up to 4.4mm

DLSR:
  • Cannon EOS M100
    • Flange to Sensor 18mm
    • +63.8 (B)
    • +25.5 (B to ring)
    • -18mm -- EOS sensor to flange: distance
    • -4.7mm adapter
    • 66.6mm
  • A6000
    • Flange to Sensor 18mm


Flat6A II: 
  • A6000: 74.5mm
  • Back of Reducer to front of ZWO ASI 1600:
    • +63.8 (B)
    • +25.5 (B to ring)
    • -6.5 (ZWO ASI 1600 cmos distance)
    • =
EdgeHD 8 0.7 Reducer:
"The optimum photographic back focus of the EdgeHD 8” is 133.35 mm at f/10, and 105 mm when used with the Reducer Lens at f/7." EdgeHD8 Manual EdgeHD WhitePaper

  • Reducer: Back of Reducer to front of ZWO ASI 1600: 105 - 6.5(sensor distance) = 98.5
  • W/O Reducer: 133.35 - 6.5(sensor distance) = 126.85


AR127 with williams optics reducer: 78.5mm + 6.5mm = 85mm

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