Sharpstar Optics
- Home /
- Telescopes /
- Refractors /
- Apochromatic Refractors /
- Sharpstar Optics
Sharpstar Optics, founded in 2000, is specialized in research, development and production in the field of astronomy. Sharpstar and Askar are the two of the company' s brands dedicated to providing customers with high-quality products and services. In addition to a series of high-quality astronomical telescopes widely praised by the market, it also has a strong OEM background for more than 10 years.
The Askar 160APO is an apo refractor with 160 mm aperture, 1120 mm focal length and a focal ratio of f/7 with many practical features.
- Aperture 160 mm - focal length 1120 mm - focal ratio f/7
- Air-spaced triplet objective with one ED element
- Stable 3.5" dual-speed RAP focuser with 360° rotator and 100 mm drawtube travel
- Sufficient working distance for observation with 2" accessories and for photography
- CNC tube rings with dovetail bar (Losmandy) and carrying handle
- Two finder shoes
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
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
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 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 60F is a very transportable APO refractor for astrophotography with corrected field of view up to full frame format and for observing up to the highest magnification range.
- Aperture 60 mm / focal length 408 mm / focal ratio f/6.8
- 4-element system with colorless ED triplet objective and one correction element built into the tube
- 44 mm illuminated image circle with very good correction up to full-frame format
- Stable 2.4" dual-speed RAP focuser with 360° rotation, threaded connections, 2" adapter and 1.25" adapter
- Sufficient working distance for observation with 1.25" accessories
- Suitable photo adapters are included in the scope of delivery
- Tube rings with Vixen/EQ5 style dovetail bar (230 mm) and carrying handle
- 2 finder shoes for standard finders and mini guide scopes included
- Retractable dew shield
- Lightweight (2.9 kg) and short (289 mm) - suitable for traveling
This photo apochromat has not only two objective lens (80 mm and 60 mm), but also three accessories (reducer, extender and flattener). Users can choose and adapt accessories according to their needs in focal lengths.
- Two different apertures, many different focal lengths and focal ratios
- With optional star diagonal also very good for visual use
- Dew shield for night use with 80 mm aperture, retractable
- Connections 2" and 1.25", photographically also M54 and M48
- Separate finder shoe
- Vixen standard dovetail bar
- In daytime observing configuration with 60 mm aperture especially light and compact, the smaller focal length allows larger fields of view
Dieser hochwertige Sextuplet SD Glas Petzvalastrograph ist sehr gut für die Astrofotografie größerer Areale geeignet.
- Öffnung 60 mm
- Brennweite 276 mm
- Öffnungsverhältnis 1:4,6
- Zwei SD-Elemente für sehr gute chromatische Korrektur
- 6-Element-Petzval-Konstruktion für Bildfeldkorrektur bis zum Vollbildformat
- Anschlussgewinde M48x0,75 mit ausreichendem Backfokus
- Geeignet für DSLR, spiegellose Systemkameras und Astrokameras
- 360°-Rotator für die Kamera
- Auszug mit Untersetzung für präzise Fokussierung (Astrofotografie)
- Zwei Sucherschuhe
Quadruplet flat-field astrograph with a 111 mm aperture for observation and astrophotography
- Aperture 131 mm / Focal length 983 mm / Focal ratio f/7.5
- Quadruplet design with field corrector built into the tube
- Triplet objective with excellent chromatic correction thanks to an ED element, single element field corrector
- Illumination and field correction up to full-frame
- Retractable dew shield for easier transport
- 360° rotation for proper camera orientation
- 3" R&P focuser with M78, M54, M48 photo threads and 2" connection
- Connection option for 2" filters available
- Two finder shoes - 1 for a finder scope, 1 for a guide scope
- Including complete optics test by Teleskop-Service on the optical bench (autocollimation) - star image extrafocal, intrafocal and focal as well as Ronchi test and protocol - so you will get a 100% tested telescope.
Quadruplet flat-field astrograph with a 111 mm aperture for observation and astrophotography
- Aperture 111 mm / Focal length 766 mm / Focal ratio f/6.9
- Quadruplet design with field corrector built into the tube
- Triplet objective with excellent chromatic correction thanks to an ED element, single element field corrector
- Illumination and field correction up to full-frame
- Retractable dew shield for easier transport
- 360° rotation for proper camera orientation
- 3" R&P focuser with M78, M54, M48 photo threads and 2" connection
- Connection option for 2" filters available
- Two finder shoes - 1 for a finder scope, 1 for a guide scope
- Including complete optics test by Teleskop-Service on the optical bench (autocollimation) - star image extrafocal, intrafo
The Askar 80ED with 80 mm aperture and 560 mm focal length offers good color correction and is ideal for mobile use.Aperture 80 mm / focal length 560 mm / focal ratio f/7
- Improved color correction due to the use of ED glass
- High-quality dual-speed R&P 2" focuser - optimized for astrophotography
- Motorized focus systems, like ZWO-EAF can be adapted directly
- M58x1 external thread on the focuser for screw adaptations
- Correctors for astrophotography calculated for the ED available (0.7x, 0.85x and 1.0x)
- With a weight of only 2 kg and a transport length of 40 cm, ideal for traveling
- 2 finder shoes, CNC rings, dovetail bar, carrying handle included in the scope of delivery
