Sharpstar-Askar

The Askar 0,8x Reducer - Corrector for the 140mm f7 Triplet APO turns the 140 mm APO into a fast Astrograph.

• designed for the Askar 140APO
• brings the focal ratio down to f5.6
• suitable for full frame cameras

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

This reducer effectively shortens the exposure time and significantly increases the field of view.

• Designed for the Askar 103APO
• Reduces the focal length by a factor of 0.6
• Screwed to the focuser
• Camera-side threads M68x1, M54x0.75 and M48x0.75
• 55 mm backfocus from M48 thread

This reducer effectively shortens the exposure time and significantly increases the field of view.

• Designed for the Askar 103APO
• Reduces the focal length by a factor of 0.8
• Screwed to the focuser
• Camera-side threads M68x1, M54x0.75 and M48x0.75
• 55 mm backfocus from M48 thread

This flattener is designed for the Askar 103APO and corrects curvature and coma.

• Designed for the Askar 103APO
• corrects curvature and cona
• Screwed to the focuser
• Camera-side threads M68x1, M54x0.75 and M48x0.75
• 55 mm backfocus from M48 thread

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

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

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.

This reducer reduces the focal length of the Askar 111F by a factor of 0.74x and significantly shortens the exposure time in astrophotography

• The reducer was designed for the Askar 111F flat-field apochromat
• The focal length is reduced to 566mm
• The focal ratio is improved from f/6,9to f/5.1
• A triplet design maintains the flat field
• The reducer is screwed directly onto the M68x1 female thread of the apos´ M78-M54 adapter
• The apo´s photo adapters can be used directly
• The working distance from the M48x0.75 thread on the camera side is 55 mm

This reducer reduces the focal length of the Askar 131F by a factor of 0.74x and significantly shortens the exposure time in astrophotography

• The reducer was designed for the Askar 131F flat-field apochromat
• The focal length is reduced to 727 mm
• The focal ratio is improved from f/7.5 to f/5.5
• A triplet design maintains the flat field
• The reducer is screwed directly onto the M72x1 female thread of the apos´ M78-M54 adapter
• The apo´s photo adapters can be used directly
• The working distance from the M48x0.75 thread on the camera side is 55 mm

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