25mm OPTEC 4300 Extension Tube (19839) - Perfect for Telescope & Microscope Accessories | Astronomy & Scientific Research Use
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Description
Description
The OPTEC-4300 25mm Extension Ring provides approximately 1-inch of extension for any OPTEC-4300 telescope adapter. Ideal for telescopes where the Gemini Focusing Rotator may need to pushed out and away from the OTA to provide clearance for cooling fans or when a little extension is required to reach optimal focus.
Specifications
| Inside Diameter: | 3.9" (99mm) |
| Outside Diameter: | 4.95" (126mm) |
Overall Height: | 1.30" (33.2mm) |
| Clear Aperture: | 3.9" (99mm) |
| Weight: | 8.8 oz (250 g) |
| Back-Focus Usage: | 0.984" (25mm) |
The OPTEC-4300 25mm Extension Ring provides approximately 1-inch of extension for any OPTEC-4300 telescope adapter.
Compatibility
- Any OPTEC-4300 telescope adapter.
- Gemini Focusing Rotator.
- TCF-Lynx3 3-inch Focuser.
The OPTEC-4300 25mm Extension Ring provides approximately 1-inch of extension for any OPTEC-4300 telescope adapter.
