Optec DSI Spacer
Best precision spacer set for amateur astronomers fine-tuning their telescope focus.
Achieve perfect back-focus with this versatile spacer set. Designed for precise optical alignment, these components ensure your imaging train is perfectly calibrated for sharp, clear results.
$250.00
More DSI options
Who it's for
- Astrophotographers needing perfect sensor alignment for sharp, flat images
- Imagers requiring rock-solid connections to prevent mechanical flexure
- Precision-focused users needing exact, repeatable spacing configurations
Who should skip it
- Budget-conscious hobbyists seeking affordable, generic spacing solutions
- Users with equipment outside the Optec ecosystem
- Owners of mounts with limited payload or motor capacity
Performance breakdown
Build durability
Rugged aluminum construction stands up to frequent field adjustments.
Focus precision
Provides the exact spacing needed for critical back-focus calibration.
System versatility
Five-piece set offers ample configurations for diverse imaging trains.
Ease of installation
Standard T-mount threading makes swapping spacers quick and intuitive.
Connection stability
Secure threading minimizes flexure during long-exposure astrophotography sessions.
Component compatibility
Works seamlessly with standard T-mount gear, though niche setups may vary.
Key Specs
Thread
3.5-inch x 24 TPI
Set Quantity
5 pieces
Material
Aluminum
Accessory Type
Adapter
Connection Interface
T-Mount
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