CELESTRON RASA 8" ASTROGRAPH TESTAR20 Optical thickness is just 3mm

Optical thickness is just 3mm

Optical design Aplanatic Schmidt-Cassegrain Aperture 203

Zeiss Micro Bayonet for use with T2 QuickChanger (QuickChanger sold separately)

1mm with the Z103) makes it a perfect match for full-frame sensors

even in apochromatic telescopes as they are not corrected outside the visible spectrum

CELESTRON RASA 8" ASTROGRAPH TESTAR20 Optical thickness is just 3mmThe Celestron RASA 8" Rowe Ackermann Schmidt Astrograph is an incredibly fast f 2 optical system designed for imaging with modern CMOS cameras. The RASA 8" provides a flat field free of optical aberrations across a 22mm field of view, with usable performance up to 32mm making it suitable for APS C and smaller sized sensors. Note: the RASA 8" cannot be used with systems requiring filter wheels or large DSLR bodies. Instead, it is recommend to use