The GSO 70mm elliptical secondary mirror is ideal for amateur telescope makers and is perfectly suited to the .
GSO secondary mirrors are offered in sizes from 62.5 - 88mm to suit a variety of primary mirrors. Well known for their excellent quality, GSO mirrors are some of the best available in their price range. The secondary mirror does not come with a holder, but can be glued in place.
The mirrors are made from BK-7 glass with highly reflective aluminium coating (typically 93%) and a protective coating of silicon oxide. GSO guarantees diffraction limited performance with a typical surface quality of 1/12 wave or better.
Each mirror is tested by GSO at the factory with a laser interferometer to ensure it meets their high standards.
Specifications
| Minor axis diameter | 70 mm |
|---|---|
| Major axis diameter | 97 mm (approx.) |
| Thickness | 12 mm |
| Weight | 156 g |
| SKU | GSAD009-70mm |
For all orders exceeding a value of 100USD shipping is offered for free.
Returns will be accepted for up to 10 days of Customer’s receipt or tracking number on unworn items. You, as a Customer, are obliged to inform us via email before you return the item.
Otherwise, standard shipping charges apply. Check out our delivery Terms & Conditions for more details.
