25mm OPTEC-4300 Extension (19839)
Category: Astrophotography Accessories
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.
Before you pay
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When it ships
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.
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Standard Shipping · United States: $0.00
Express Shipping · United States: $3.99
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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.
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