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This instrument was requested by some of the world's most advanced amateurs
who recognize the inherent advantages of a highly corrected, super-sharp
refractive optical system for widefield high-resolution astrophotography.
Astro-Phyiscs will produce only a limited number of these refractors.
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SPECIFICATIONS | |
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Color correction: | Less than 0.01 % focus variation from 405nm to 706nm (r to h wavelengths) |
Clear aperture: | 180mm (7.1") |
Focal length: | 1260mm (49") |
Resolution: | 0.64 arc seconds |
Coatings: | Mufti-layer, overall transmission greater than 97% in peak visual wavelengths |
Magniflcation range: | 22x to 700x |
Tube assembly: | White, 8" aluminum tube, baffled, flat black interior, engraved push-pull lens cell |
Focuser type: | 4.0" Astro-Physics rack & pinion focuser, 4.5" travel; 2.7", 2" and 1.25" adapters; 2.5" extension |
Telescope length: | 1219mm (48") w/ dewcap fully retracted |
Weight with dewcap: | 34 lbs. (15.4kg) |
Carrying-case type: | Wood case with grey vinyl covering, foam-lined interior, removable wheels |
Case outside dimensions: | 52" x l3" x l3" (132cm x 33cm x 33cm) |
Weight of case: | 25 lbs. (11.4kg) |
35mm prime-focus field: | 1.1 x 1.5 degrees @ f7 |
35mm telecompressor field: | 1.5 x 2.1 degrees @ f5.2 |
35mm field with 2x Barlow: | 0.5 x 0.8 degrees @ f14 |
6x 7cm prime focus field: | 2.7 x 3.2 degrees @ f7 |
Right: Company Seven ATA Case custom fitted for a Astro-Physics 13cm EDT Apochromat Telescope with 2.7 inch Focuser (65,974 bytes).
Click on image to see enlarged view (215,942 bytes).
These cases are made to order with a variety of customer preference choices, and each is custom fitted to a particular Astro-Physics telescope or mount.