Telescopes

The TS 10" f/8 Ritchey-Chrétien Astrograph is a dream telescope for astrophotography.

• Aperture 10" / 250 mm
• Focal length 2000 mm
• Focal ratio f/8
• Hyperbolic primary and secondary mirror for very high sharpness on the optical axis and a large well-corrected field for astrophotography
• Mirrors made of fused silica for stable focus position
• 94% enhanced reflectivity on main and secondary mirror for an even brighter image
• Quicker cooling down thanks to open construction and primary mirror ventilation
• Two Losmandy style dovetail bars supplied - ideal for accessories like guiding scopes or a piggyback camera mount
• Carbon truss tube - more rigidity and better focus stability for astrophotography
• 3" MONORAIL focuser with M77x0.75 female thread on the extension tube and M74x0.75 male thread connection and 2" / 1.25" reduction adapter
• Extension tubes for the focuser (2x 25 mm, 1x 50 mm) are supplied (image at left)
• RC correctors for larger sensors are optionally available
• New! Primary mirror and the M117 connector for the focuser are decoupled from each other. The focuser can be adjusted (tilted) independently from the primary mirror.

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

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

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.

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