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REFRACTOR 90/540 F6 APO SLD FPL55 OWL OPTICS TECNOSKY
TECNOSKY OWL 90/540 SLD
New product
REFRACTOR 90/540 F6 APO SLD FPL55 OWL OPTICS TECNOSKY
Subject to availability from the supplier. Please contact us for more information.
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REFRACTOR 90/540 F6 APO SLD FPL55 OWL OPTICS TECNOSKY
New Ohara FPL-55 fluorite triplet apochromatic scope, edge-blackened lenses and blue-violet FMC anti-reflective coating. Aluminum optical tube with retractable sunshade and internal diaphragms.
New rotating focuser, very precise, 2.5" rack with 1.25" reduction equipped with a 1:10 micrometric fine adjustment To facilitate the centering of objects, there is a front precision field rotator the 2" focuser.
The 2" focuser features a Quick-Lock locking system and the 2" to 1.25" reduction also features a self-centering locking system.
The newly designed rings are raised and allow the use of long Vixen or Losmandy bars so the optics can be balanced, even with heavy cameras.
Above the rings there is a handle which makes handling the optics very comfortable and which can also serve as a support bar for an additional optic.
Thanks to the triplet optical scheme and the use of Ohara FPL-55 glass, chromatism is absent both visually and in astrophotography, moreover each optic is accompanied by an individual inspection certificate with a minimum strehl ratio of 0 .95, a very high value which guarantees optical quality of the highest level!
If used with the Tecnosky 0.8x corrector/reducer, this refractor becomes an incredible astrograph with a focal ratio of F/4.8. Also compatible with 1x and 0.8x full-frame field correctors. The equipment is delivered in a padded hard case.
Technical characteristics :
- Air spaced Apo triplet with FPL55 synthetic fluorite center lens, high refractive index front and rear lens. All surfaces are FMC treated.
- Optical interferometric certificate with minimum Strehl 0.95
- Aluminum intubation, made with CNC machines. Inside are sharp-edged diaphragms to eliminate reflections
- Retractable sunshade with lock button
- New 2.5" rack-and-pinion focuser with 2" and 1.25" self-centering clamp and field rotator
- On one side of the focuser there is a 1:10 micrometer knob. A graduated scale is printed on the tube. 50.8 to 31.8 mm adapter included
- Precision CNC Rings with Long Vixen Bar and Accessory Carry Handle
- Weight 4890 grams
- Minimum length 480 mm, with extended sun visor 520 mm