Sharpstar
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.
This reducer, when used with the 65PHQ astrograph, can effectively shorten the exposure time and significantly increase the field of view.
- specially designed for the 65PHQ
- reduces the focal length by 0.75x
- four-lens system
- camera-side threads M54 and M48
- 65 or 55 mm backfocus
389.00 €
Estimated delivery time : 1-4 days
This reducer, connected with the astrographs, can effectively shorten the exposure time and dramatically increase your field of view.
Designed for 107PHQ, 130PHQ and 151PHQ Reduces focal length by 0.7x Triplet design with ED glass Plugs into focuser Connection threads M68x1 male, M54x0.75 male, M48x0.75 male 55 mm backfocus from M48 thread
565.00 €
Estimated delivery time : 1-4 weeks
The Askar 0,8x Reducer - Corrector for the 185mm f7 Triplet APO turns the 185 mm APO into a fast Astrograph.
- designed for the Askar 185APO
- brings the focal ratio down to f5.6
- suitable for full frame cameras
489.00 €
Estimated delivery time : 1-4 days
The Askar 1.0x corrector for the 185mm f7 Triplet APO provides a very good image quality across the entire field of view.
- developed for the Askar 185APO
- provides very good image quality across the entire field of view
- suitable for full-frame cameras
579.00 €
Estimated delivery time : 2-3 days
This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat.
- 130 mm aperture, 1000 mm focal length, f/7.7
- Petzval like, self flattening design with two ED elements
- 3.4" dual speed focuser
- 2" and 1.25" receptacles, M68, M54 and M48 threads
- Retractable dew shield
- Losmandy style dovetail bar
- Handle
- Vixen type finder base
3869.00 €
Estimated delivery time : 1-4 weeks
Askar has created with the FMA135 a compact triplet APO refractor with many photographic and visual possibilities
Focal length 135 mm / focal ratio f/4.5 Triplet ED lens with 30 mm aperture 3-element corrector for perfect field flattening Working distance 55 mm from the T2 threaded mount With just a few hand movements the telephoto lens becomes a mini guiding scope or a compact spotting scope for observation The photographic field of view is designed up to APS-C format Precise helical focuser on the lens for precise focusing - with lock Can be easily attached to the telescope instead of the finder - fits all common finder shoes Fits on any ball head - ideal also for mobile astrophotography with photo trackers like the Skywatcher Adventurer Mini or iOptron Skytracker
309.00 €
Estimated delivery time : 1-4 days
This long focal ratio flatfield apochromat support 60 mm image circle and does not need calculations for backfocus. If the image is sharp, the field is flat.
151 mm aperture, 1057 mm focal length, f/7 Self flattening design with two ED elements 3.4" dual speed focuser 2" and 1.25" receptacles, M86 thread Retractable dew shield Losmandy style dovetail bar Handle Vixen type finder base
5317.00 €
Estimated delivery time : 1-4 weeks
The Askar 185APO is an apo refractor with 185 mm aperture, 1295 mm focal length and a focal ratio of 1:7 with many practical features.
- Aperture 185 mm - Focal length 1295 mm - Focal ratio f/7
- Triplet objective with one ED element
- Stable 3,5" RAP focuser with micro reduction, 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 clamps with dovetail bar (Losmandy) and carrying handle
- Two finder shoes
6199.00 €
Estimated delivery time : 1-4 days
The very good correction and the self-flattening design make this small telescope a compact photo machine.
- Aperture 65 mm / focal length 416 mm / focal ratio f/6.4
- 5-element system with color clean triplet objective and two corrector lenses built into the tube
- Stable 2.5" RAP focuser with dual speed and 360° rotation
- Sufficient working distance for observation with 2" accessories
- Suitable photo adapters are included in delivery
- Illuminated image circle with very good correction up to full frame format
- CNC tube rings with Vixen style EQ5 dovetail bars and carrying handle
- Finder shoe for standard finder and mini guiding telescopes available
1074.00 €
Estimated delivery time : 1-4 weeks
Askar Focal Plane Adjuster - Tilting Adapter with 18 mm length
The adapter corrects a tilted image field and improves the sharpness of the image at the edge for astrophotography.
The adapter corrects a tilted image field and improves the sharpness of the image at the edge for astrophotography.
- Connection telescope side - M54x0.75 and M48x0.75 (with adapter) - female thread Connection camera side - M48x0.75 male thread
- Overall length of the adapter is 18 mm (without external thread)
- Simple operation without knurled screws and reliable clamping
- The 18 mm optical path is maintained even when tilting
- The adapter is light-tight
- The adapter is also suitable for narrow-band solar photography to prevent interference
299.00 €
Estimated delivery time : 1-4 days
With this adapter, you can precisely set the correct backfocus without the tedious experimentation with tuning rings.
- Simplifies setting the correct backfocus. M54x0.75 female thread on the telescope side
- M48x0.75 male thread on camera side optical length continuously
- adjustable from 16 to 20 mm
199.00 €
Estimated delivery time : 1-4 days
The MCP90 is a universal plate for all potential devices equipped with a standard Vixen dovetail foot and designed for the Askar FRA400/5.6 astrograph.
- 100 mm length for more flexibility
- Clamps safely with two screws
- Versatile with six positions for the clamping screws
- Five threaded holes and two countersunk bores for attaching to handle or tube rings
66.00 €
Estimated delivery time : 1-4 days
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