Optec 4300 to Female Optec DSI Adapter
Best precision adapter for dedicated astrophotography enthusiasts.
This adapter provides a reliable mechanical bridge for specialized imaging trains, ensuring components align perfectly without sacrificing precious back-focus. It is a simple, robust solution for connecting specific threaded spacers to a focusing rotator.
$135.00
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Who it's for
- Astrophotographers needing reliable hardware compatibility for their imaging train
- Serious observers prioritizing stability and long-term durability in their equipment
- Users working with limited back-focus distance in complex optical paths
Who should skip it
- General hobbyists seeking versatile, multi-purpose telescope adapters
- Budget-conscious astronomers looking for the most economical mounting solutions
- Novice users who prefer plug-and-play accessories without technical research
Performance breakdown
Back-focus efficiency
Ultra-thin profile preserves precious space for complex imaging trains.
Mechanical rigidity
Precision machining ensures rock-solid stability for heavy camera payloads.
Light throughput
Wide clear aperture effectively eliminates vignetting in demanding optical setups.
System compatibility
Seamlessly bridges specialized DSI standards with Gemini focusing rotators.
Build quality
Industrial-grade construction withstands the rigors of frequent field assembly.
Installation ease
Straightforward threading makes modular component swapping quick and intuitive.
Key Specs
Inside Diameter
3.5-inch DSI Thread
Outside Diameter
125.7mm
Overall Height
10.7mm
Clear Aperture
88mm
Weight
110g
Back-Focus Usage
2.5mm
Compatibility
Optec/DSI 3.5-inch Threaded Spacers, Gemini Focusing Rotator
Connection Type
OPTEC-4300 to Female Optec/DSI 3.5-inch thread
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