Welcome to IIS Joe, at 700mm focal length with 8mm EP you should easily be able to see saturns rings and give a good view of Jupiter as well. That equates to around 90x mag. (Saturns rings are visible with just 20x mag). Start with just the 8mm ep and see how you go. Unless the seeing conditions are exceptional any more magnification is probably going to make the image worse. Increased magnification doesn't necessarily equate to a better view due to atmospheric effects and diminished light intensity at higher mags. An 8mm EP barlowed 2x (around 180x) is about as much magnification as you could reasonably expect from your newt. Newts also require a period of time for cooldown and collimation needs to be spot accurate for sharp images.
|