Apochromatic telescopes

An ultimate and compact APO refractor for astrophotography and observation.

• Aperture 110 mm / focal length 528 mm / focal ratio f/4.8
• FCD100 triplet lens with f/6 - chromatic correction comparable to FPL53 triplet
• 4-element 0.8x corrector with M48 camera connection and working distance of 55 mm included - designed for this lens for highest field sharpness
• 2" filter thread and 360° rotation included
• 2" Visual-Back can be screwed to the focuser instead of the corrector for observation - working distance suitable for 1.25" and 2" accessories
• Delivery in high-quality carrying case
• Each apo is tested (cosmetics, optics and mechanics) at Teleskop-Service before shipment, the optics are collimated. The apo is shipped with a checklist.

• Very high quality optics
• Universal use (as a guider or astrophotographic telescope)
• Compatible with Flattener 61
• Usable as guider with 360mm focal length for primary optics with focal lengths between 700mm and 1200mm

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

The TS 102 mm f11 SDP Apo offers excellent chromatic aberration correction by pairing FPL53 with additional special glass

• Very good correction of chromatic aberrations by a 2-element APO lens with FPL53 from Ohara and an additional special glass
• Very good correction also in the violet color range, where faster SD-Apos give in a bit
• Even at 250-300x sharpness is maintained
• Adjustable lens mount
• Improved 2.5" rack and pinion RAP focuser with photo thread, 2" and 1.25" adaption
• Retractable dew shield for better transport and optimal protection against stray light
• Deluxe finder holder for adapting finder telescopes
• Binoviewers can be used without path compensation
• CNC tube rings and EQ5 style dovetail bar included
• With only 4.6 kg the ED is well supported by mounts like the Skywatcher EQ5
• Each TS Apo is individually tested before shipping (optics, mechanics, cosmetics), a checklist is attached.

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 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 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 fast 110 mm ED APO offers good chromatic correction through two special glasses, it is designed for observation and astrophotography.

• Aperture 110 mm / focal length 660 mm / focal ratio f/6
• 2-element APO objective with FPL51 and Lanthanum glass from Ohara-Optics
• Full multicoating for high contrast
• 2.7" RAP focuser with ball bearing, 360° rotation and micro reduction
• M74x1 female thread for screw adaptions
• CNC tube rings - aluminium tube - retractable dew shield
• Aluminium carrying case
• Made in Taiwan

The TS 110 mm ED with 770 mm focal length is a transportable telescope for astrophotography and for observing with good color correction.

• Aperture 110 mm / focal length 770 mm / focal ratio f/7
• ED Dublet objective with glass from Ohara (Japan)
• Good correction of color error by ED element up to magnifications around 220x
• Stable 2.5" RAP focuser with 2", 1.25" ring clamp and auxiliary thread for screw adaptions
  Dual-speeed and 360° rotation of the focuser - important for astrophotography
• 0.8x reducer and corrector for astrophotography specially calculated for the TS 110 mm f/7 ED available
• Only 65 cm transport length and 6.8 kg weight - is well supported by a mount of the EQ5 class
• Optimized CNC tube with retractable dew cap and CNC clamps with M6 female thread connection
• Vixen level dovetail bar with photo tripod connection thread included

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

With the FMA180 Askar has created a triplet APO refractor with unique visual and photographic applications

• With just a few simple steps, the APO telephoto lens can be transformed into a compact astronomical telescope, a guide scope or a powerful spotting scope for landscape observation.
• Aperture 40 mm
• Air-spaced triplet ED lens for almost pure color image
• Photographic focal length 180 mm (with corrector) - focal ratio f/4.5
• 2" filter thread in front of the objective for nebula filters
• Focal length for observation 220 mm
• The photographic field of view is up to full frame size
• Precise helical focuser on the lens for accurate focusing - with locking mechanism
  T2 camera connection with 55 mm working distance (when used as telephoto lens)
• Weight only 395 grams
• Can easily be attached to the telescope instead of the finder
• Fits on any ball head - also ideal for mobile astrophotography with photo trackers like the Sywatcher Adventurer
• Ideally suitable also as mini guide telescope
• The FMA180 can be converted into a compact spotting scope for observation in just a few steps

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 96 mm f/6 triplet apochromat with color-clean image - high quality triplet objective from Japanese production.

• Aperture 96 mm / focal length 576 mm / focal ratio f/6
• Multi-coated 3-element lens with FCD100 APO element (similar to FPL53) from Hoya (Japan) for a color-pure image
• Lens including cell is made in Japan
• Internal baffles for higher contrast and against reflections
• 2.5" RAP dual-speed focuser with improved draw tube bearing - carries accessories up to 10 kg without shifting
• Connection for screw adaptations via M63x1 female thread, 2" and 1.25" receptacle
  Retractable dew shield for transport
• CNC tube rings, Vixen/EQ5 style dovetail bars on both sides and finder shoe are included in delivery
• Each apo is tested and optimized at our optical bench before shipping

TS PHOTOLINE 106 mm f/6.6 triplet apochromat with color-clean image with high-quality triplet lens from Japanese production

• Aperture 106 mm / focal length 700 mm / focal ratio f/6.6
• Multi-coated 3-element lens with FCD100 APO element (similar to FPL53) from Hoya (Japan) for a color-pure image
• The lens including cell is made in Japan
• Lens is adjustable with pull and push screws
• Internal baffles for higher contrast and fewer reflections
• 3.5" dual-speed RAP focuser with improved bearing of the draw tube - supports cameras up to 10 kg without shifting
• Connection for screw adaptions via M63x1 female thread - 2" and 1.25" receptacle
• Powerful telescope also for observing with clear, high contrast image
• Retractable dew shield for transport
• CNC tube rings, Vixen/EQ5 style dovetail bar, carrying handle and finder shoe are included in the scope of delivery
• Each Apo is visually and mechanically inspected and tested before shipment
• Includes 3" 0.75x field corrector - improves focal ratio to f/4.95 with full correction to full frame
  

TS PHOTOLINE 85 mm f/6 triplet apochromat with color-clean image - high quality triplet objective from Japanese production.

• Aperture 85 mm / focal length 510 mm / focal ratio f/6
• Multi-coated 3-element lens with FCD100 APO element (similar to FPL53) from Hoya (Japan) for a color-pure image
• Lens including cell is made in Japan
• Internal baffles for higher contrast and against reflections
• 2.5" RAP dual-speed focuser with improved draw tube bearing - carries accessories up to 10 kg without shifting
• Connection for screw adaptations via M63x1 female thread, 2" and 1.25" receptacle
• Retractable dew shield for transport
• CNC tube rings, Vixen/EQ5 style dovetail bars on both sides and finder shoe are included in delivery
• Each apo is tested and optimized at our optical bench before shipping

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 fast 50 mm refractor with the improved ED 50 mm objective can be used as a travel telescope, spotting scope and guiding scope.

• Excellent image due to the 50 mm f/4 ED lens with blackened edges
• Straight view and adaptation of star diagonal mirrors or Amici prisms possible due to detachable tube
• High-quality Crayford focuser with 1.25" compression ring and T2 connection - supports up to 2 kg
• CNC tube rings with multi-function plate included
  Telescope fits in standard finder shoes (Skywatcher, Vixen, GSO, TS-Optics ...)
• 3/8" photo thread is available at the base. With a 1/4" reducer the adaption to any tilt and ball heads is also possible

The TS 4-element 62mm aperture refractor is a versatile spotting scope and telescope, a 520mm telephoto objective and a powerful guide scope for astrophotography.

• aperture 62 mm
• Focal length 520 mm -- Focal ratio f/8.4
• 4-element design for sharp imaging of moon, planets and deep-sky objects, but also daytime observing
• a versatile travel telescope for observing and photography due to a flat field of view
• sensitive Crayford focuser for precise focusing with locking screw
• 1.25" connector and T2 connector for screw adaptations
• sufficient working distance for use of 1.25" amiciprism, zenith prism and of course photo adapters
• finder shoe for direction finders, optical finders or mini guide scopes
• Carrying case with plenty of space for accessories
• Retractable dew cap - transport length only 310 millimeters
• High quality workmanship "Made in Taiwan"

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
• elescope.

A versatile ED refractor telescope for observation and photography - usable as APO spotting scope, guiding scope and super finder scope.

• aperture 60 mm / focal length 360 mm / focal ratio f/6
• 2-element APO objective with Nissan Super ED glass as APO element
• Usable as angled finder with optional 1.25" star diagonal or Amici prisms with 1.25" helical focuser (non rotating)
• 360° rotation on the eyepiece and camera side
• Can be used as a straight view finder with 1.25" helical focuser - the extension is integrated and screwed into the tube
• 1.25" "non-rotating" helical focuser - screw-on - with locking screw
• With the optional TSMPT60-Flat 1.0x corrector, the ED refractor becomes a full 360 mm f/6 telephoto lens for photography and astrophotography with objective focusing
• Includes adjustable clamps and dovetail bar for finder holder with 1/4" female thread for photo tripods

This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat.

• 130 mm aperture, 1000 mm focal length, f/7.7
• Petzval like, self flattening design with two ED elements
• 3.4" dual speed focuser
• 2" and 1.25" receptacles, M68, M54 and M48 threads
• Retractable dew shield
• Losmandy style dovetail bar
• Handle
• Vixen type finder base

The 107PHQ is a transportable APO refractor for astrophotography with corrected field of view up to full frame sensor and for observation up to the highest magnification range.

• Aperture 107 mm - focal length 740 mm - focal ratio f/7
• 4-element Petzval system with color-correct triplet objective and a corrector lens built into the optical tube
• Stable 3.4" RAP focuser with micro-reduction and 360° rotation - adjustment range 110 mm
• Sufficient working distance for observing with 2" accessories and for photography
• Besides 1.25" and 2" the apo offers M48, M54, M68 and M86 threads for screw adaptions
• 44 mm image circle with full illumination and correction allow the use of large sensors with high resolution
• CNC tube rings with Vixen/EQ5 style dovetail bar and carrying handle
• Finder shoe for standard finder and mini guiding telescopes available
• High quality carrying case for optimal protection of the telescope
• Each Quadruplet Apo is inspected and its optics tested before shipping - you get an optimally adjusted telescope for successful photography and observation from the very beginning.

The ASKAR APO 60 mm f/5 Quintuplet Apochromat from Sharpstar is optimized for wide field astrophotography with high resolution cameras

• aperture 60 mm
• focal length 300 mm / focal ratio f/5
• 5-element quintuplet design with corrector in the tube
• ED glass in the lens for very good correction of chromatic aberration
• 44 mm image circle with full illumination and correction
• Working distance optimized for photography - e.g. with cameras with 55mm flange focal length
• Stable 2.5" RAP focuser with micro reduction and 360° rotation
• M54x0.75 , M48x0.75 and T2 adapter included for easy camera adaption
• Internal thread for 2" filter available
• Flexible GP/EQ5 level Dovetail bar with photo tripod connection and carrying handle with flexible oblong hole
• Viewfinder shoe for standard viewfinder bracket

With the FRA600 F/5.6 quintuplet astrograph, Askar has created a pure-color apochromat for astrophotography with large sensors.

• Aperture 108 mm / 4.3"
• Focal length 600 mm
• Focal ratio f/5.6
• 5-element design - the 2-element corrector is permanently installed in the tube
• 66 mm image circle with full illumination and correction
• 140 mm working distance for observation with 2" star diagonal
• Long transition adapter for photography to M48x0.75 with 2" filter thread included
• Rugged 4" RAP focuser with dual speed reduction and 360° rotation
• Losmandy style dovetail bar
• Flexible tube rings with carrying handle and lateral threads for individual adaptations
• Finder shoe for standard finder bracket
• Each FRA600 comes with an inspection checklist from the manufacturer and is also tested on our optical bench

The ASKAR APO 72 mm f/5.6 quintuplet apochromat from Sharpstar is optimized for astrophotography with high resolution cameras

• Aperture 72 mm
• Focal length 400 mm / focal ratio f/5.6
• 5-element quintuplet design with corrector in tube
• Two ED glasses in the objective for very good correction of the chromatic aberration
• 44 mm image circle with full illumination and correction
• 140 mm working distance for visual observation or focal length reduction
• Stable 3" dual-speed RAP focuser with 360° rotation
• 2" and 1.25" receptacles as well as M68x1 external thread for screw adaptations
• Long adapter from M68 to M48x0.75 camera connection is included in delivery (with 2" filterthrad)
• Flexible GP/EQ5 style dovetail bar with photo tripod connection and carrying handle with flexible slotted hole
• Finder shoe for standard finder holder
• Including inspection check list of the manufacturer

TS PHOTOLINE 106 mm f/6.6 triplet apochromat with color-clean image with high-quality triplet lens from Japanese production

• Aperture 106 mm / focal length 700 mm / focal ratio f/6.6
• Multi-coated 3-element lens with FCD100 APO element (similar to FPL53) from Hoya (Japan) for a color-pure image
• The lens including cell is made in Japan
• Lens is adjustable with pull and push screws
• Internal baffles for higher contrast and fewer reflections
• 3.5" dual-speed RAP focuser with improved bearing of the draw tube - supports cameras up to 10 kg without shifting
• Connection for screw adaptions via M63x1 female thread - 2" and 1.25" receptacle
• Powerful telescope also for observing with clear, high contrast image
• Retractable dew shield for transport
• CNC tube rings, Vixen/EQ5 style dovetail bar, carrying handle and finder shoe are included in the scope of delivery
• Each Apo is visually and mechanically inspected and tested before shipment

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

The ASKAR FRA 500/5.6 APO quintuplet apochromat from Sharpstar is optimized for astrophotography with high resolution cameras

• Aperture 90 mm
• Focal length 500 mm / focal ratio f/5.6
• 5-element quintuplet design with corrector in tube
• Two ED glasses in the triplet objective for very good correction of the chromatic aberration
• 55 mm image circle with full illumination and correction
• 158 mm maximum working distance from drawtube with all adapters for photography and observation
• Stable 3.5" dual-speed RAP focuser with 360° rotation
• Adapters to M68x1, M54x0,75, M52x0,75 and M48x0,75 are included in delivery
• Starting with the M48 thread, you have comfortable working distance for all common astro cameras, DSLR and system cameras
• Flexible Losmandy style dovetail bar with photo tripod connection and carrying handle with flexible oblong hole
• Finder shoe for standard finder holders
• Including inspection check list of the manufacturer