SKY-WATCHER DELUXE MIRROR COATINGS
Most reflectors today usually have a coat of aluminium as the mirror surface and then an overcoat of silicon monoxide or silicon dioxide to protect it. Silicon dioxide produces a much more durable coat than silicon monoxide but requires specialized equipment to apply it and is therefore more expensive. Protection is needed, because in most reflectors, the mirror is open to the elements and deterioration of the reflective layer reduces the resolution of the telescope. ALL Sky-Watcher reflectors are Multi-Coated with Silicon Dioxide as standard for Optimum Durability and Long Term Performance.
5 MARITIME STREET
SUNDERLAND SR1 3JQ TEL (0191) 5679308
FAX (0191) 5100317
OPEN 9.30-5PM MON-SAT
WEDNESDAY 9.30-1PM
VAT REG NO
176 4600 57
4 THE GATES
DURHAM DH1 4SL TEL (0191) 3830813
FAX (0191) 3830813
OPEN 9.30-5PM MON-SAT
VAT REG NO 569 3008 27