Sbig FW8G-STT filtrový karusel 8 poziční s naváděcím sytémem před filtry, opakovaní filtrového umístění je lepší než 1 pixel. Filtrový karusel FW8G-STT se samo naváděním zahrnuje čočkový telekompressor a naváděcí CCD čip KAI-0340, to dovolí nastavení na požadovanou filtrovou pozici a ohniska se zajištěním polohy zaostření uzamčením. Umožňuje tak pointaci se snímáním světla hvězd mimo filtry při astrofotografii. Nově navržený karusel s 8 pozicemi umožňuje použít 36 mm filtry nebo pomocí adaptéru také 1 1/4" filtry. Celé sady filtrů 36mm LRGB a úzkopásmové jsou dostupné od Astrodon, Baader Planetarium a Astronomik bez vinětace pro každou světelnost. Umožňuje použít adaptéry pro Nikon a Canon objektivy.
Features
A new filter wheel design for the STT series sets it apart from other designs. The carousel holds eight 36mm filters and inserts are available for 1.25" filters. Two new unique features make this an imager's delight: First, the design incorporates a self-guiding CCD in the filter wheel cover so that light from the guide star is captured before passing through the filters. An optional filter wheel cover is available for wide angle imaging with Nikon or Canon 35mm camera lenses, or for anyone who does not need or want the built-in self-guiding. Full sets of 36mm LRGB and Narrowband filters by Astrodon, Baader Planetarium and Astronomik are available for unvignetted imaging at any f/ratio.
The second unique feature of the STT filter wheel is a positive centering mechanism that precisely re-positions and firmly holds filters in exactly the same position over the CCD every time, regardless of a loss of power or intervening movement of the filter wheel.
In our tests of the new design, using an STT-8300, the re-positioning of the filters was accurate to better than 5.4 microns after several complete rotations of the filter carousel. This degree of precision means that flat fields taken after the filter has moved and returned are accurate to a single pixel. An example of the improvement in flat fields with this kind of precision is demonstrated in the comparison images below.
Poznámka: cena platí při dovozu s CCD kamerou.
