Northcote Hill Farmhouse, (off) Roseberry Rd, Norton,
Stockton-on-Tees. TS20 1LB.  England.
Tel. 01642 554699
E-Mail: john_nichol@hotmail.com
Serving the needs of Telescope Makers
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455mm F3.9 Mirror and secondary

One only, this mirror is 1/6 wave (Strehl .92). Available from stock but not coated allowing the buyer the choice of standard or enhanced aluminium coatings. Delivery will be about 6-7 weeks from order. Please read my notes about testing found elsewhere on this website. I will be happy to answer any questions. Full details of the mirror set are:

Diameter: 455mm

Focal Length: 1780mm

F ratio : 3.9

Thickness: 42mm

Substrate: Suprax

Weight: approx. 14 Kgs

Wavefront error: 1/6 wave, Strehl .92

Secondary MA: 90mm

Secondary Thickness: 15mm

Secondary Substrate: Plate Glass

 

Price with standard aluminium coatings: £1799.00 (UK pounds)

Price with enhanced aluminium coatings (96%):  £1959.00 (UK pounds)

 

Shipping UK : £65.00 Europe £95.00