Apochromatic telescopes

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

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 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.

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