Tecnosky Dielectric Diagonal 1.25" CF 90°
When will I receive it?
Products marked In stock are dispatched promptly — the exact delivery estimate for your address is shown at checkout, before you confirm the order.
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Products marked Available on order require 5–15 business days for processing. Our team will keep you updated promptly if anything changes.
What are the warranty terms?
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Many brands also offer extended warranty coverage beyond 24 months — contact us to find out the specific terms for the product you're interested in.
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Can I return a product?
Yes: you have 14 days from delivery to return any product and receive a full refund — see our Refund Policy for full details.
Items must be returned in their original condition and packaging. Return shipping costs are the customer's responsibility.
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The Tecnosky Dielectric 1.25" CF 90° Diagonal is designed to provide high optical and mechanical quality, offering a significant upgrade over the basic diagonals supplied with many entry-level telescopes. The housing is made from CNC-machined aluminium and carbon fibre, ensuring excellent stability, durability and precision.
The 31.8 mm (1.25") eyepiece holder features a brass compression ring to protect the barrels of your eyepieces from scratches and pressure marks. Inside, a high-quality mirror—polished to 1/10 lambda PTV and coated with a 99% dielectric reflective layer—delivers maximum light throughput and bright, high-contrast images.
Suitable for virtually any type of astronomical use, this diagonal provides a noticeable performance improvement compared to standard low-cost diagonals included with many telescopes.
Technical Specifications
| Format | 1.25" (31.8 mm) |
| Angle | 90° |
| Materials | CNC-machined aluminium and carbon fibre |
| Mirror | 1/10 lambda PTV |
| Coating | 99% dielectric aluminium coating |
| Eyepiece holder | Brass compression ring |