OctaSlide / TetraSlide Filter Slider RASA

Introducing the OctaSlide / TetraSlide Filter Slider

Introducing the Twinstar OctaSlide / TetraSlide Filter Slider—the first motorized filter slider designed specifically for RASA telescopes. Engineered for astrophotographers seeking precision and efficiency, the OctaSlide / TetraSlide offers unparalleled functionality in a compact design.

  • Motorized Filter Control: Seamlessly switch between filters during imaging sessions without manual intervention.

  • MONO and OCS: Enables high-quality mono or OSC imaging with multiple filters, and also allows you to capture calibration frames remotely—all with precision and ease.

  • Ultra-Thin and Lightweight: Designed to minimize additional weight and maintain optimal balance on your telescope.

  • ASCOM Compatibility: Fully compatible with ASCOM standards, ensuring smooth integration with your existing software.

  • Premium Materials and Finish: Crafted from high-quality materials for durability and a professional appearance.

  • On-Axis Filter Placement: Ensures optimal light path alignment for superior image quality.

  • Eight-Filter Capacity: Holds up to eight filters, providing versatility for various imaging needs.

  • Universal Telescope Compatibility: Compatible with all telescope systems – offers broad usability. Requires a suitable adapter for your specific setup.

  • USB-C Connectivity: Single cable solution for both power and communication simplifies setup and reduces cable clutter.

  • Integrated manual Camera Rotator: Allows precise camera rotation for optimal framing and composition.

  • European Manufacturing: 100% made in the EU, ensuring high-quality production standards and support.

  • Remote Operation: Enables remote filter changes and calibration image acquisition, enhancing convenience during RASA imaging sessions.

  • Various Models & Customization Options: Compatible with all popular filter sizes — available in configurations for 4 to 8 filters, tailored to your setup and imaging needs.
  • Corner Tilting: Fully compatible with PhotonCage. Our own integrated tilt-adjustment solution is coming soon.

🚨 Important News: Pre-Reservation Open! 🚨

We’re currently collecting interest for the upcoming Twinstar OctaSlide and TetraSlide filter slider models to help us better plan production.

🔧 The first batch will feature the 8x31mm OctaSlide, specially designed for the RASA 8 telescope.
📆 Models for other telescope systems will follow in later production runs.

💡 If you’re interested, please fill out the pre-reservation form and help us shape the next stage of our production.

OctaSlide – Early Bird Offer!

🚀 Limited Time Offer!
For the first 30 reservations of the OctaSlide 8x31mm (designed for RASA 8), we’re offering a special introductory price:
✅ 500 EUR + VAT + 25 EUR shipping (worldwide)

Due to the complexity of manufacturing, assembly, and premium materials used, the regular price will increase by at least 100 EUR after this batch.

📦 What’s included in your kit:

  • OctaSlide Filter Slider

  • Short USB-C cable

  • Screws and filter holders

📩 Interested?
Reserve your unit now and secure your spot at this exclusive price!

🎯 Take advantage of this opportunity to upgrade your imaging setup with precision-engineered gear—made 100% in the EU and backed by a passionate team of astrophotographers.

OctaSlide / model 8x31mm

RASA model RASA 8
Weight 340 g
Payload   5 kg 
Central obstruction by diameter: 58%
Central obstruction by surface area: 32%
Filter change speed 15 seconds per filter / one direction
Control system  ASCOM compliant 
Connectivity USB-C / power and control
Power  5V
Maximum power current  max. 0.5A
Rotator range 360°
Threads M48 (camera side)
Diameter 116mm
Backfocus distance 22.3mm
Used material
 Anodized aluminum and PET

Specific question?

Feel free to ask any question you have, and I’ll do my best to assist you.

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