WILLIAM OPTICS REDCAT 91 WIFD f/4.9 REFRACTOR M69 16 Hz or greater

16 Hz or greater

RASA or EdgeHD in the Fastar/Hyperstar configuration you’re probably used to running cables out the front of the dew shield

Backlash will exist if there are mechanical gears in the focusing system

Views show both plage and dark mottling of chromospheric network

This adapter also lets you secure your camera at a precise angle for perfect framing

WILLIAM OPTICS REDCAT 91 WIFD f/4.9 REFRACTOR M69 16 Hz or greaterThe William Optics RedCat 91 WIFD is a new addition to WO's range of fast Petzval refractors with their innovative internal focusing mechanism. This makes it simple to install autofocusers such as the ZWO EAF without the need for clumsy belt driven add ons. It has a focuser bush diameter of 33mm and therefore it need the 33mm PLL adapter in order to connect the Prima Luce Lab Sesto Senso II focuser The RedCat 91 WIFD features the same excellent