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Baader Semi Apo Filter against violet fringes of refractors - 1
The background remains black also at big exit pupils
Fine adjustment yes Manual tracking yes Accessory tray yes Fitting for prism rail yes (Vixen style)
♦ Magnification 16x
Focal length 21
Omegon 1.25" Variable Grey Filter Baader Semi Apo Filter againstDescription Allows for selective adjustment of brightness which is useful for terrestrial observation and objects of the Solar System. You often find considerable differences in detail brightness on objects of the Solar System. This is particularly noticeable when observing: Moon craters which are close to the lunar terminator Sun spots and faculae. Caution: only to be used in association with an appropriate solar filter on the front of your
