♦ Reduction factor: 0.75x
♦ Telecope side connection: M82x1 thread (male)
♦ Camera side sonnection: M82x1 thread (female)
♦ Working distance: between 76 mm und 92 mm, depending on the telescope´s focal length
♦ Illumination and correction: up to full-frame sensors
♦ Necessary back focus when the corrector is screwed to the focuser: approx. 210 mm
♦ Diameter of the body for sinking into the draw tube: 90 mm - the corrector can be sunk into various 3.5" focusers. Thus the necessary back focus is reduced to approx. 110 mm.
The working distance is calculated from the female M82x1 thread at the camera side. The thread is not taken into account, so the calculation starts from the edge of the reducer´s body. The distance depends on the focal length of the refractor. As a basic rule: the shorter the focal length, the longer the working distance.
♦ focal length < 650 mm: 80.7 mm
♦ focal length 660-700 mm: 80 mm
♦ focal length 710-780 mm: 77.4 mm
♦ focal length 790-800 mm: 76.5 mm
♦ focal length 810-1000 mm: 76 mm
♦ focal length > 1000 mm: 75 mm
Specific values were determined for the following telescopes:
♦ TS and APM APO 107/700 mm: 80 mm
♦ TS Photoline APO 115/800 mm: 76.50 mm
♦ TS Photoline APO 130/780 mm: 77.40 mm
♦ Skywatcher Esprit 152/1000 mm: 77 mm
The reducer can also be used for RC telescopes from 10" upwards:
♦ GSO/TS/AstroTec RC from 10" upwards: 76 mm
Camera side sonnection: | M82x1 thread (female) |
Telecope side connection: | M82x1 thread (male) |
Coating: | Multicoated on all glass-to-air surfaces |
Body material: | Aluminium |
Reduction factor: | 0.75x |
Number of elements: | 3 |
Length: | 83.7 mm |
Diameter: | 90 mm |
Weight: | 1000 grams |
Required back focus: | Approx. 210 mm from the connection thread or 110 mm if the corrector is sunk |