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OPTEC 50mm OIII Unmounted Filter 500.7 nm CW, 8 nm BW, for Intelligent Filter Wheel (IFW), 2mm Thick
The Optec O-III filters are parfocal with the LRGB 50mm set. These filters have hard coatings, +90% transmission at the center wavelength and a passband of only 8nm.
OPTEC 16mm Extender Tube between Camera Adapter and Pyxis Camera Field Rotator
OPTEC TCF-S/IFW Telescope 2" Male Barrel Mount, for any 2" Focuser.