Apochromatic Refractors

The new TS Photoline 150 mm f/8 Apo convinces with its high optical performance, neat chromatic correction and very good mechanics - with large 3.7" focuser for astrophotography with large sensors

• Aperture 150 mm / focal length 1200 mm / focal ratio f/8
• Very good chromatic correction due to color-pure imaging by "Extra-Low-Dispersion" FPL53 APO element from Ohara (Japan) and lanthanum glass element
• Fast cooling due to the 2-element objective design
• With only 9.5 kg the telescope is still transportable and can be carried by mounts from EQ6 upwards
• 3.7" focuser with 360° rotation - rack and pinion - one of the best focusers in its class
• Multi-coated objective and inner baffles for optimal contrast
• M92x1 and M68x1 female threads are available for screw adaptions - illumination up to full frame format is given
• Working distance 130 mm from the 2" receptacle or 230 mm without extension between focuser and tube
• Slide-in dew shield, CNC tube rings, finder shoe, dovetail bar and carrying handle are included in the scope of delivery
• Suitable correctors and focal length reducers for astrophotography are available
• Each apo is checked and optimally adjusted on the optical bench at Teleskop-Service before shipment. Upon request, we will send an optics test (stellar imaging focal, extrafocal, intrafocal and Ronchi) with it.

The Premium ED apo with 96 mm aperture and fast f/6 is a transportable telescope for astrophotography and observation

• Aperture 96 mm / focal length 575 mm / focal ratio f/6
• Good correction of color aberration by FDC1 special glass
• Lens manufactured in Japan - very good image quality
• Internal baffles for contrast enhancement
• 2.5" RAP focuser with gear reduction and improved focuser support via large ball bearings
  1.25", 2" and M63x1 female thread connection on the eyepiece side
• Retractable dew shield for transport - can be extended up to 100 mm
• Finder shoe included for adapting finders and small guide scopes.
• CNC tube rings and two Vixen / EQ5 style dovetail bars included.
• For astrophotography, we offer a 0.94x reducer and corrector which is made for this
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The 140 mm f/6.5 triplet apochromat convinces with a pure color image and a powerful 4" RAP focuser.

• Aperture 140 mm
• Focal length 910 mm
• Fast focal ratio f/6.5
• Air-spaced triplet objective - 2 ED elements provide an image free from chromatic aberration
• Solid 4" rack and pinion focuser with dual speed - ideal for astrophotography
• Intermediate threads for screwed adaptations, e.g. M68x1 female thread
• Retractable dew shield
• CNC tube rings, carrying handle and dovetail bar are included in the scope of delivery
• Carbon tube for easier transport and high stability
• Delivery in transport case
• Every apochromat is tested by the manufacturer and Teleskop-Service before shipment
• Each apo receives a serial number and is delivered with a photographical test certificate

TS Photoline APO refractor wit 72 mm aperture and fast f/6 focal ratio, a great travel telescope for observation and astrophotography.

• Powerful, aberration-free apochromatic refractor with 72 mm aperture and 432 mm focal length.
• Fast focal ratio: f/6
• FPL53 doublet objective (Ohara Japan), air-spaced - additional lanthanum glass element, so no chromatic aberration
• 2.5" dual-speed rack-and-pinion focuser - ball bearing mounted for maximum load with M63x1 female thread for adaptions
• Retractable dew shield - the apo even fits into the hand luggage
• CNC tube rings with versatile dovetail bar - EQ5 style and with photo tripod connection.
• Finder shoe on the focuser is included
• Weight only 2.18 kg - transport length only 31 cm

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

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

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

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

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

William offers with the REDCAT71 Astrograph a very well corrected telescope for astrophotography up to full frame format.

• Aperture 71 mm / Focal length 350 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 precise helical focuser like 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