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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.

Starlight Instruments 2.0" Diameter Riser

by Starlight Instruments
SKU SI-R20-0.65
$80.00 - $110.00
$80.00
$80.00 - $110.00
$80.00
Price Match Policy!
  • Adds fixed height to 2.0" diameter focuser bases on Newtonian telescopes
  • Solves focus issues for accessories with long back-focus requirements
  • Available in five height options: 0.65", 1.0", 1.4", 2.75", and 3.75"
  • Precision-machined for a rigid, tilt-free connection
  • Black anodized finish matches Starlight Instruments focusers and bases
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  • Description
  • FAQ
  • Specifications
  • Warranty

  • Starlight Instruments 2.0" Diameter Riser

    The Starlight Instruments 2.0" Diameter Riser solves critical focus travel issues for Newtonian telescopes by providing a fixed height extension for 2.0" diameter focuser bases. Available in five precise increments from 0.65" to 3.75", these risers ensure accessories with long back-focus requirements can achieve a sharp, stable image plane.

    Solving Focuser Travel Issues: 5 Heights from 0.65" to 3.75"

    If your camera, binoviewer, or certain eyepieces cannot reach focus because your focuser runs out of outward travel, a riser is the direct solution. By mounting between the focuser base and the focuser body, this component physically elevates the entire assembly, effectively shifting the available focus range outward. With five options ranging from 0.65" to 3.75", you can select the precise height needed to accommodate your specific optical train.

    This is a fixed, rigid solution designed for a dedicated imaging or visual setup. Choosing the correct height is critical; measure the additional outward travel your system requires and select the riser that most closely matches that distance. This approach provides a much more stable connection than using multiple extension tubes in the drawtube.

    Seamless Integration with 2.0" Starlight Instruments Bases

    Engineered to work with Starlight Instruments' 2.0" diameter curved and flat bases, this riser maintains the mechanical integrity of the Feather Touch system. Each riser is machined from high-grade aluminum and anodized to match the fit and finish of Starlight's focusers. This ensures a solid, tilt-free interface that won't compromise the collimation or stability of your focuser, even when carrying heavy imaging loads.

  • How do I know which Starlight Instruments 2.0" Riser height I need?

    First, determine how much more outward focus travel you need. Rack your focuser all the way out and insert the accessory that won't reach focus. Then, slowly pull the accessory out of the drawtube until the image is sharp. The length of the gap between the accessory's shoulder and the focuser is the approximate riser height you need. Choose the Starlight Instruments 2.0" Riser from the available options (0.65", 1.0", 1.4", 2.75", or 3.75") that is closest to your measurement.

    I can't reach focus with my binoviewer on my 12" f/4 Dobsonian. Will a 2.0" Riser help?

    Yes, this is a common application for the Starlight Instruments 2.0" Riser. Binoviewers typically require significant in-focus travel, but on some Newtonian designs, the problem is insufficient out-travel. If you cannot achieve focus with your current setup, a riser will move the entire focuser outward, giving you the range needed to bring the binoviewer to a sharp focus, often without needing a Barlow or optical corrector assembly.

    My camera needs 55mm of back focus, but my 2.0" Feather Touch focuser is racked out on my imaging Newtonian. Which riser is best?

    To determine the right riser, measure how far short of 55mm you are. If, for example, your focuser is fully extended and you still need another 25mm of outward travel, the 1.0" riser (which is 25.4mm) would be the ideal choice. The goal is to select a riser that places your camera's ideal focus point near the middle of the focuser's drawtube travel for fine adjustments.

    Will the Starlight Instruments 2.0" Riser introduce any flex into my imaging train?

    No. The Starlight Instruments 2.0" Riser is machined from a solid piece of aluminum to the same high tolerances as Feather Touch focusers. When properly installed between a Starlight Instruments base and focuser, it creates a rigid, stable extension that will not introduce tilt or flex, even with heavy camera payloads.

    Can I stack multiple Starlight Instruments 2.0" Risers?

    While physically possible, it is not recommended. Stacking risers can create a long lever arm that puts excessive stress on the focuser base and telescope tube. It is always better to use a single riser of the correct height. Starlight Instruments offers five options up to 3.75" to cover most scenarios with a single, solid component.

    Is this 2.0" Riser compatible with focusers other than Starlight Instruments?

    This riser is specifically designed for the bolt pattern and diameter of the Starlight Instruments 2.0" focuser and its corresponding bases. It is not guaranteed to fit focusers or bases from other manufacturers.

  • Diameter 2.0"
    Compatibility Starlight Instruments 2.0" Diameter Focuser Bases
    Available Heights 0.65", 1.0", 1.4", 2.75", 3.75"
  • Starlight Instruments 2-Year Warranty