But then again the jump from 70mm to 200mm is HUGE !
As Poita says the colours wont be visable in nebula , they will look a lot bigger tho, and a 200mm Newtonion views will knock your sox off compared to the 70mm , you wont be dissapointed .
You will see colours in Mars , jupiter , saturn and stars very well with a 200mm scope .
Brian.