WILLIAM OPTICS PLEIADES 68 F/3.8 ASTROGRAPH BF25-QHY Baffles have been added to

Baffles have been added to increase contrast and AR coatings are optimized for the 656nm wavelength

If you aren't sure

Optical thickness 4 mm (1

3mm of free aperture

The back surface reflection of the primary mirror (called Mangin) is the main characteristic distinguishing the Riccardi-Honders optical design

WILLIAM OPTICS PLEIADES 68 F/3.8 ASTROGRAPH BF25-QHY Baffles have been added toThe William Optics Pleiades 68 is a super fast f 3. 8 astrograph featuring a triplet front lens and a built in quadruplet flattener reducer. Three Super ED extra low dispersion elements ensure excellent colour correction. The telescope features William Optics' new WIFD internal focusing mechanism for enhanced stability, particularly with heavy image trains. The WIFD series has been designed from the ground up to support the latest large and heavy high