WILLIAM OPTICS PLEIADES 181 F/5.5 ASTROGRAPH Deep be it at the original

be it at the original f/10

zero-backlash and no periodic error

7μ RMS at 35 mm on-axis

The optional TZ-4S 4x telecentric is available for telescopes faster than f/8 to achieve the desired focal ratio

The ToupTek ATR585M Pro Imaging Kits include the ToupTek ATR585M Mono cooled deep sky camera

WILLIAM OPTICS PLEIADES 181 F/5.5 ASTROGRAPH Deep be it at the originalThe William Optics Pleiades 181 is the ultimate imaging refractor for medium format cameras. The new 7 element lens design with three Super ED extra low dispersion elements to ensure excellent colour correction and a generous 55mm image circle. With a substantial 181mm aperture, fast f 5. 5 focal ratio and 998mm focal length, the Pleiades is ideal for high resolution imaging of many deep sky objects. The seven element, temperature compensated lens