William Optics Apochromates
The various apochromats from William Optics USA are very popular in the astro community. The manufacturer offers innovative ideas and a large selection of different apochromatic designs that can be universally equipped.
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Test report Interferogram
149.00 € Delivery date : Unbekannte Lieferzeit
Test report with autocollimator
99.00 € Delivery date : Unbekannte Lieferzeit
From the beginning, the goal was to create the best possible design for an affordable, small, lightweight, and fast Apochromatic refactor for astrophotography.
Characteristics: 4 lens Petzval optical design Aperture 51mm, focal lenght 250mm, f/4.9 Massive OTA from Aluminum alloy Compact and ultra portable Field rotator Helical focuser design Tilting platform Field illumination even for full frame sensors 1190.00 € 1050.00 € Delivery date : 1-2 weeks William offers with the REDCAT61 Astrograph a very well corrected telescope for astrophotography up to full frame format. Aperture 61 mm / Focal length 300 mm / Focal ratio f/4.9 Petzval design with chromatic aberration free FPL53 objective (4 elements in 3 groups) Very well corrected and illuminated image field up to full frame format - the corrector is built in - no more adapter battle necessary Camera connection via M48 male thread (suitable adapters are available) - working distance 55 mm 360° rotation of the camera for the right display window Focusing via internal focusing (William Internal Focus Design - WIFD) as with telephoto lenses Tilting option for individual adjustment of the camera sensor to the telescope Flexible dovetail bar at the base (long version), suitable for Vixen style and Arca-Swiss saddle plates, in addition with 1/4" female photo tripod thread Nylon carrying bag and Bahtinov mask for astrophotography are included in delivery 1899.00 € Delivery date : 3-4 weeks
This three-lens apochromat with FPL-53 element and STM coating delivers color-pure, crisp images! Stars are pin sharp points, bright objects like moon and planets show no color fringes, but a lot of details!
Characteristics: 3 lens Apochromat with FPL-53 element Aperture132mm, focal lenght 910mm, f/6.9 Optimized OTA Attachable WO flatteners / correctors 3.3" R&P focuser Field illumination even for full frame sensors 5490.00 € Delivery date : 3-4 weeks
The APO refractor Fluorostar has a three-lens air-gap objective using the ED special glass FPL-53 from Ohara, Japan, and glass made of lanthanum.
Characteristics: 3 lens air spaced FPL-53 / lanthanum design Aperture156mm, focal lenght 1217mm, f/7.8 Optimized OTA Attachable WO flatteners / correctors 3.7" R&P focuser Field illumination even for full frame sensors 8449.00 € Delivery date : 3-4 weeks Discover the universe in breathtaking clarity with the William Optics Fluorostar 120 Telescope! Key data: High quality 3 lens optics with FPL53 lenses CNC tube Massive 3.3" R&P focuser with 1:10 reduction ratio Focal length 780mm Aperture 120mm Focal ratio f/6.5 APS-C and Fullframe Format 4790.00 € Delivery date : 3-4 weeks The new ZenithStar 61 are the most versatile and lightest apos from William Optics. High-quality optics with FPL53 lenses Universally applicable for nature and astronomical observations Ideal for astrophotography An ideal travel instrument Precise R&P focuser with 1:10 gear reduction 799.00 € Delivery date : 3-4 days The FLT 91 is the perfect apochromatic refractor for visually and photographically observing astronomers who demand the most from a medium-sized telescope. Three-element design with FPL53 glass 91 mm aperture, 540 mm focal length Rack and pinion focuser with gear reduction and "Rotolock" clamp Field rotator with degree markings and position lock Prism rail according to Vixen standard Versatile handle with Vixen standard finder shoe William Optics' patented Bahtinov mask 3190.00 € Delivery date : 3-4 days The Gran Turismo refractor is an apochromatic triplet with FPL-53 element for highest colour purity and strong contrast! A refracting telescope that is versatile and leaves little to be desired. An ideal travel instrument High-quality 3-lens optics Can be used visually and photographically 2.5" focuser with 1:10 gear reduction Supplied with focus mask according to Bahtinov 1190.00 € Delivery date : 1 week The William Optics GT 81 apo stands for optimal chromatic correction and best possible contrast - a powerful travel telescope for observation and photography. Aperture 81 mm Focal length 480 mm Focal ratio f/5.9 Multicoated FPL53 triplet lens with air gap 2.5" RAP focuser with M63x1 connection thread, as well as 2" and 1.25 Multifunction handle with holder for guide scopes Bahtinov mask integrated Variable carrier bag Vixen/EQ5 style dovetail bar 1550.00 € Delivery date : 1-4 days Innovative and revolutionary William Optics design combines precise internal focusing with the highest quality optics available to create the ultimate apochromatic refractor for astrophotography FPL53 Triplet Lens Aperture 81 mm, focal length 480 mm Internal focusing prevents image shift and vignetting Saddle bar handle for mounting the guiding telescope Incl. test report Incl. carrying bag 1999.00 € Delivery date : 1 week