SharpStar Optics

The SharpStar Range

The catalogue splits between refractors for portable wide-field imaging and fast Newtonian astrographs for maximum light gathering for the price.

• ED photographic refractors: Compact doublets and triplets from around 60 mm upward, designed with imaging in mind and paired with dedicated flatteners and reducers.
• Hyperbolic Newtonian astrographs: Fast Newtonians with hyperbolic primaries and integrated correction, giving flat well-corrected fields at focal ratios around f/2.8 to f/4.
• Matched reducers and flatteners: Model-specific correctors with defined back-focus figures, which must be hit within about a millimetre.
• Larger aperture refractors: Triplet designs for imagers wanting more focal length while keeping a refractor's convenience and freedom from collimation.
• Focusers and mechanical accessories: Rotators, extension tubes and dovetails designed to fit the tubes precisely.
• Speed versus tolerance: The fastest astrographs collect light extraordinarily quickly and demand correspondingly precise collimation and spacing.

Why Choose David Astro for SharpStar Optics

Very fast optics reward precision and punish approximation, which is where the support matters.

• Corrector spacing supplied: We provide the exact adapter and spacer list for your camera and filters, including the focal shift the filter glass introduces.
• Collimation expectations set: A fast hyperbolic Newtonian needs tighter collimation than a typical f/6 tube, and we recommend a tool that reaches that accuracy.
• Sensor coverage checked: We confirm the corrector's image circle covers your sensor before recommending the combination.
• Authorized dealer: Full manufacturer warranty with verified authenticity, serviced in Canada.
• Ships from Canada: No duties or brokerage fees for Canadian buyers.

SharpStar in Canada — Frequently Asked Questions

Are very fast astrographs hard to use?

They are less forgiving. Collimation tolerance and back-focus tolerance both tighten as focal ratio drops, so a system that is fine at f/6 needs real care at f/3. The reward is dramatically shorter integration times.

Do I need the matched reducer?

For imaging with anything larger than a small sensor, yes. The refractors have curved focal planes without one, and using a corrector designed for a different tube gives worse results than none at all.

Refractor or hyperbolic Newtonian?

Refractor for simplicity, portability and no collimation. Newtonian for far more aperture and speed at the same cost, accepting collimation as routine maintenance.

Is warranty handled in Canada?

Yes. As an authorized dealer we process warranty and service claims domestically, with no international shipping required.

Specifying a SharpStar setup?

Send us your camera and filters and we will match the tube, corrector and spacing. Domestic shipping, expert support.