William Optics Pleiades 111 AP 111/528 Astrograph OTA apochromatic reflector

William Optics Pleiades 111


The new Pleiades 111 Quadruplet-APO is an astrograph with FPL-53 lenses and integrated corrector and WIDF ("WO Internal Focus Design").

This device is designed exclusively for astrophotography. With its 7-lens design, the Pleiades 111 delivers sharp and clear images. The model has a very fast aperture ratio of f/4.8, ideal for astrophotography and short exposure times. The full-format sensors are fully illuminated. In addition to the Bahtinov focusing mask and a protective carrying bag, this apochromatic refractor is supplied with two adapters for CCD and DSLR cameras: M48 and M54.

The Pleiades 111 is compatible with electronic focusers, such as the ZWO EAF, and can be used with full-format, DSLR/APS-C, mirrorless, CMOS and CCD camera formats. Corresponding T-adapters are optionally available: Canon EF, RF / Nikon F, Z / Sony E / Pentax K / Micro Four Thirds / Fuji X.

The design of the Pleiades 111 is inspired by the star cluster that gives it its name and stands out with its elegant black and blue color. It includes a prism guide Vixen/GP, as well as a handy grip that also accepts William Optics finders or guide tubes.

Specifications

• Optical Design: Apochromatic Quadruplex Refractor
• Aperture (mm): 111
• Focal Length (mm): 528
• Aperture ratio (f/): 4.8
• Resolution capability: 1.24
• limiting value (mag): 12.3
• Maximum useful magnification: 222x
• Tube weight (kg): 7.95
• Transport length (mm): 645
• Tube length (mm): 785
• Optical coating: SMC multi-coating
• Scattered light deflectors on tube: yes
• Glass material: OHARA FPL-53
• fully corrected field (mm): 45
• Dew shield: yes
• Dovetail plate: Vixen-Style
• Bahtinov focusing mask: yes
• Carrying handle: yes
• Carrying bag: yes
• Integrated corrector: yes
• Camera adapter: M54

Focuser

• Connection (eyepiece side): 2
• Ring fixation: yes
• Fine Motion Reduction: 1:10
• Rotatable: yes

William Optics Pleiades 111