Tele Vue 21.0 Ethos (ETH-21.0)

Tele Vue 21.0 Ethos (ETH-21.0)The 21mm focal length completes the logical set of 21mm 13mm 8mm and nicely juxtaposes the 17mm 10mm 6mm combination. Each step within these two sets approaches a 3x field area gain. The 21mm's effective field stop diameter is 36. 2mm, bringing its true field close to the 35mm Panoptic (38. 7mm Field Stop diameter). Its true field is also larger than the 26mm Nagler with its 35mm effective field stop diameter. In an f 4 Dobsonian, the exit pupil is

8 Mount with Tripod max height 58

With the 31mm

for example

The Advanced VX 8" Schmidt Cassegrain telescope is ideal for imagers and visual observers looking for a telescope that is much more portable than the reflector or refractor

59") Compatible Telescopes: CGEM | CGEM II | CGEM DX | CGE | CGE PRO | CPC Deluxe HD | CGX | CGX-L

you may need to add additional counterweights to off-set the weight

Some of the finest Solar System images have been made with Powermates

until the battery is depleted and shuts off

5-pound counterweights and a counterweight extension bar

do not place more than one spacer between tubes

Focuser extensions of various lengths are often used to create the necessary distance for proper spacing of field lenses to imager

3 watt-hours