The
Sky Scan N310 is a very good telescope for amateurs who are not yet
accustomed to telescopes and have just started out. It has a high focal
ratio and hence gives good image quality. It is very useful
for moon and planetary viewing. With an eyepiece of 18mm focal length,
a good deal of details can be seen on planets. Jupiter and 4 of it's
moons, Jupiter's band, Saturn, phases of Venus can be seen very
clearly. The moon of course can be observed in detail. Plaeids, the
Orion Nebula can be better seen with an eyepiece of around 30mm.
Primary mirror : 80mm diameter with front surface aluminum coating ,
having Silicon Monoxide protective layer, Spherical and hand figured
mirror.
Focal length : 790 mm.
f / ratio : f / 10.
|
|
|
|
Secondary mirror : Minor axis 19.1mm ,
flatness better than 0.2 microns (lambda/4), and having front surface
aluminum coating with protective Silicon Monoxide layer.
Tube : Lightweight , impact-resistant PVC tube treated internally with
matt finish black paint for maximum contrast. Outside of the tube
painted with Epoxy paint.
Tube length : Approximately 800 mm.
Total Height : 3 1/2
feet approximately. (42 inches).
Mounting : Wooden
stand , fitted on aluminium tripod with self - lubricating nylon bushes
, having both vertical and horizontal motions (Alt-Azimuth).
Limiting Magnitude :
13
Resolution limit
(Dawe's) : 1.45 seconds
Maximum useful
magnification : 157x
Magnification : 88x
- With eyepiece of 9mm , 44x - With eyepiece of 18mm , 27x - With
eyepiece of 30mm
|
