Elliptical secondary flat for Newtonians - diameter minor axis 140 mm - 97 % reflectivityNewton primaries of ORION Optics UK belong to the best mirrors on the market. Also the secondaries play in the same quality league.
AccuracyThe surface of the secondaries has a roughness of 1/12 wave RMS or better.
The 97 % HILUX coatingA true highlight - you gain substantially more light at the same aperture. Normal mirrors have reflectivities of about 90 %. 10% of the light is lost, while at the Orion mirrors only 3 % are not reflected. The object appears significantly brighter and the exposure times for photography are reduced.
Delivery contains:- Elliptical Secondary Flat 140 mm
Products specifications
|
Thickness
|
20 mm |
|
Coating
|
HILUX 97 % Coating |
|
Weight
|
ca. 3.3 lb |
|
Glastype mirror
|
PYREX from Corning |
|
Diameter
|
140 mm minor Axis |
