|
Do you know about cooling down time, smenkhare?
Both types of telescopes need to be allowed to cool to equilibrium because thermal currents in the tube deteriorate the image (I think the actual mirror needs to reach same temp as outside air). Although you can still use the scopes as soon as you take it outside.
You need to set the scope outside for a while before getting a good image, especially deepsky.
Which cools quicker Newt or SCT?
|