Refractors

The William Optics GT 71 Apo stands for optimal color correction and best possible contrast - a powerful travel telescope for observation and photography.

• Aperture 71 mm
• Focal length 420 mm
• Focal ratio f/5.9
• Multicoated air-spaced FPL53 triplet lens
• 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
• Golden Edition

The special feature of the 140mm SD APO with Riccardi Reducer:

• Very high quality processed and of convincingly good optical quality
• Colorless optics with FLP53 glass
• Precise 2.5" focuser with 1:10 mirco reduction for heavy accessories
• With f / 7 ideal for visual
• With f/5,25 ideal for photographic purposes with Riccardi Reducer
• CNC tube rings
• Carry handle
• Very good value for money

The Askar 203APO is one of the largest apochromatic refractors from series production - a powerful refractor for your observatory

• Aperture 203 mm - focal length 1421 mm - focal ratio f/7
• Air-spaced triplet APO objective with one ED element
• Stable 3.5" RAP focuser with speed reduction and 100 mm travel
• Working distance suitable for photo correctors and 2? accessories for observation
• Suitable for EAF motorized focus
• Two finder shoes - 1x for finder - 1x for mini guide scope

100 mm (4”) f/700 ED apochromatic refractor telescope

• Maximum useful magnification: 200x
• Aperture: 100 mm
• Focal length: 700 mm (f/7)
• Dual-speed 11:1 2" Crayford focuser
• 2.8" extension tube with scale and 360º rotation adapter
• Multi-coated lens with MHTC coating
• Slide-in dew cap
• 2" eyepiece connection
• Viewfinder shoe compatible with all Sky-Watcher viewfinders
• Tube rings with handle
• 45 mm prism rail
• Aluminium OTA with light shields
• OTA length: 570 mm (dew cap inserted), 675 mm (dew cap extended)
• OTA weight: 5.5 kg

Translated with DeepL.com (free version)

SV48P 102mm Achromatic Telescope Refractor with 2.5" RAP Dual-Speed Focusing & Dovetail Mounting Plate for Astronomical Observation

• 102mm large aperture; large objective lens refractor telescope; high resolution; good light collecting ability; f/6.5 focal ratio; imaging brighter;
• f/6.5 short focal ratio; larger field of view; can collect more light; the image is brighter; and the observation target is clearer and easier to observe;
• Dual-speed focusing; fast focus allows you to quickly move the focus wheel to roughly focus on your target; while slow focus adjusts focus more finely for optimal image clarity;
• Integral telescope rings; the tube rings make the telescope more stable and avoid wobbling; and provide a stable support to keep the optical components of the telescope stable relative to each other;
• Easy to assemble and use; the telescope is designed to be user-friendly; it can be set up quickly without additional tools; you can find a lot of fun in assembling.

Note: The main lens have been corrected completely.

Best Achromatic Telescope for Astronomy Beginners

New Vixen SD115SII apochromatic high-performance refractor with FPL53 SD glass and improved optical properties for demanding observers and astrophotographers

• Apochromatic high-performance refractor with FPL53 ED glass
• Reduces chromatic aberration to an absolute minimum
• Guarantees enormously high contrast and excellent sharpness
• You get a very colour-pure, sharp and neutral image
• Very light and transportable, ideally suited for mobile applications
• Fully-coated 115 mm SD lenses without spacer plates
• No more unwanted spikes visible on the stars
• High quality standard "Made in Japan"
• Dimensions: 125 x 920 mm
• Weight: 6.3 kg with accessories

The Ultra-Cat 76 is a powerful apochromatic 76 mm refractor designed for astrophotographers who demand very high sharpness and color fidelity.

• Aperture ratio 1:4.8
• Petzval optical design with integrated corrector (five elements in total)
• Temperature-stable lens cells
• Color-pure and sharp imaging even when using a full-frame sensor
• William Optics Internal Focus Design (WIFD)
• Rotator and tilt flange included
• Patented multifunctional handle
• Camera-side connection: M54, M48

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, air-spaced FPL53 triplet lens
• 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

102mm (4") f/500 ALT-AZIMUTH REFRACTOR TELESCOPE

2'' Connector Takahashi FS-60/78 FC-76DC und FC-100 DC, TKA21110

• Connection (object side): M56x0,75(neg)
• Connection (observer side): 50,8mm(neg)
• lightpass: 39mm

The Askar 140APO is an apo refractor with 140 mm aperture, 980 mm focal length and a focal ratio of f/7 with many practical features.

• Aperture 140 mm - Focal length 980 mm - Focal ratio f/7
• Triplet objective with one ED element
• Stable 3.5" dual-speed RAP focuser with 360° rotation connection and 100 mm adjustment travel
• Sufficient working distance for observation with 2" accessories and for photography
• Flattener and two reducers available (0.8x)
• CNC tube rings with dovetail bar (Losmandy style) and carrying handle
• Two finder shoes

120mm (4.75”) f/900 ED Apochromatic Refractor Telescope

• 120 mm aperture, 900 mm focal length, focal ratio f/7.5
• High image quality thanks to extra-low dispersion glass FPL53 (Ohara, Japan) and matching glass from Schott
• Highly effective coating for maximum transmission and minimum reflections
• Large Crayford focuser with 11:1 reduction for sensitive focusing
• 360° rotation adapter
• Tube in traditional white - heats up less during the day and is more visible at night

Fast 70mm high-performance astrograph F5.5 for demanding astrophotographers and observers with 5 lens elements in 5 groups

• Very fast 70mm high-performance astrograph for demanding astrophotographers
• Due to the large lenses there is almost no vignetting
• Complex construction with 5 lens elements in 5 groups for absolute correction
• Needle-thin stars up to the edge of the image field even with 44 x 33 mm camera format
• Large, stable eyepiece extension, also suitable for heavy cameras
• Extremely high sharpness, colour purity and contrast thanks to SD lenses
• Very large field illumination up to 55mm
• High Strehl intensity of 96.7% at visible wavelengths
• Optional reducer available for even faster results
• Optional motor focuser with two speeds can be retrofitted

The Askar 120APO is a 120 mm aperture, 840 mm focal length, and f/7 native focal ratio apo refractor with many useful features and two corrector options.

• Aperture 120 mm - focal length 840 mm - focal ratio f/7
• Triplet objective with one ED element
• Stable 3.3" RAP focuser with dual speed, 360° rotation and 100 mm travel
• Sufficient working distance for observing with 2" accessories and for photography
• Flattener and reducer (0.8x) available
• CNC tube rings with Vixen GP style dovetail bar and carrying handle
• Two finder shoes
• With optical test by Teleskop-Service on the optical bench (autocollimation) - star test extrafocal, intrafocal and focal as well as Ronchi test and report - so you have a 100% tested telescope

The powerful ED apo is suitable for observing and astrophotography with an high-contrast image.

• 150 mm aperture, 1200 mm focal length, focal ratio f/8
• High image quality thanks to extra-low dispersion glass FPL53 (Ohara, Japan) and matching glass from Schott
• Highly effective coating for maximum transmission and minimum reflections
• Large rack and pinion focuser with 11:1 reduction for sensitive focusing
• 360° rotation adapter
• Tube in traditional white - heats up less during the day and is more visible at night

Takahashi offers rotating camera mounts for its telescopes, which are necessary because most of the company's focusers are not rotatable. However, this rotator also makes sense visually, as it allows the ZSP or other accessories to be conveniently rotated into the desired position. The quality is so high that there is no play even when the screw is loosened.

• Connection on the telescope side: M56x0.75 internal thread
• Connection on the camera side: M56x0.75 external thread
• Light path: 12.3 mm
• Weight: 110 g

The Askar 103APO is a 103 mm aperture, 700 mm focal length, and f/6.8 native focal ratio apo refractor with many useful features and several corrector options.

• Aperture 103 mm - focal length 700 mm - focal ratio f/6.8
• Triplet objective with one ED element
• Stable 3.3" RAP focuser with dual speed, 360° rotation and 100 mm travel
• Sufficient working distance for observing with 2" accessories and for photography
• Flattener and two reducers available (0.6x and 0.8x)
• CNC tube rings with Vixen/EQ5 style dovetail bar and carrying handle
• Two finder shoes

The Esprit-70EDX from Skywatcher offers the highest optical and mechanical quality and is optimized for astrophotography.

• Aperture 70 mm
• Focal length 490 mm (f/7)
• Triplet apo objective with FCD100 ED element
• Improved 2.8" dual-speed focuser for high payload
• 360° rotation
• 2" connection with additional thread for screw adaptations
• Retractable dew shield
• Carrying handle, Vixen GP style dovetail bar, carrying case

Takahashi offers matching 1:7 microfocusers for all telescopes with normal focusers.

• TOA-130(N)S
• TSA-102, TSA-120
• FC-76DS, FC-76DC
• FS-60CB, FS-60Q, FS-60C, FOA-60(Q)
• FS-60CB, FC-76DP
• SKY90
• FS-78, 102, 128N
• FC-65, 76, 100, 100N, 125N
• FCT-65
• MT-130, 160, 200
• Epsilon 130, 160, 180
• Mewlon mit Okularauszug TKA00700

The Esprit-100EDX from Skywatcher offers the highest optical and mechanical quality and is optimized for astrophotography.

• Aperture 100 mm
• Focal length 550 mm (focal ratio f/5.5)
• Triplet apo objective with FPL53 ED element
• Improved 3" dual-speed focuser for high payload
• 360° rotation
• 2" connection with additional thread for screw adaptations
• Dew shield (fixed)
• Carrying handle, Losmandy style dovetail bar, carrying case

The Esprit-120EDX from Skywatcher offers the highest optical and mechanical quality and is optimized for astrophotography.

• Aperture 120 mm
• Focal length 840 mm (focal ratio f/7)
• Triplet apo objective with FPL53 ED element
• Improved 3" dual-speed focuser for high payload
• 360° rotation
• 2" connection with additional thread for screw adaptations
• Retractable dew shield
• Carrying handle, Losmandy style dovetail bar, carrying case

The Esprit-150EDX from Skywatcher offers the highest optical and mechanical quality and is optimized for astrophotography.

• Aperture 150 mm
• Focal length 1050 mm (focal ratio f/7)
• Triplet apo objective with FPL53 ED element
• Improved 3" dual-speed focuser for high payload
• 360° rotation
• 2" connection with additional thread for screw adaptations
• Retractable dew shield
• Carrying handle, Losmandy style dovetail bar, carrying case

Takahashi Extension Tube (FL), Short Distance Ring

• Connection (object side): M56x0,75(neg)
• Connection (observer side): M56x0,75(pos)
• lightpass: 17,5mm
• Shipping weight:  1kg

• Connection: M56x0.75
• Extension factor: 1.04x
• Number of lenses: 2

The compact FS-60CB Apo can be upgraded to a 60/600 f/10 quadruplet Apo with this 1.7x Q module. Optically, this version is superior to the FS-60CB ... 

• Extension factor: 1.7x
• Number of lenses: 2

This extender is suitable for the Takahashi fluorite apochromats FS-60CB, FS-60Q, FC-76D (both versions), FC-76Q, and FC-100D (all versions). However, it is also compatible with the older Sky-90 and FSQ-106 fluorite models, which are no longer manufactured. Of course, it can also be used with many other devices as a moderate focal length extension.

•  Connection: M43x0.75(pos)
• Extension factor: 1.6x
• Number of lenses: 5