Quote:
Originally Posted by mental4astro
So, comparing an 200mm to a 114mm and a 70mm, the 200mm will collect 3 times as much light as a 114, and 8 times as much as a 70mm. What will you see? In a 70mm, bugger all galaxies, a 114mm, some galaxies, but no detail, and a 200mm, NOW you're talking serious detail starting to be made out and lots and lots of galaxies.
|
hi
totally agree that light gathering ability is proportional to aperture, but the 70mm in this poll is a refractor, would a 70mm refractor or an 80mm refractor be considered a decent enough scope for a beginner, reason I ask is because quite a few sites refer to a 80mm and above refractor as being acceptable for a beginers scope. the ED80 although expensive when new, was selling for 400 odd at IISAC.
How would the Skywatcher 102 x 500 AZ3 at Andrews for 400 compare with an 8" reflector for DSO's as its relatively a short FL achromat?
I have an 8" reflector and am very happy with it, but for a grab n go scope, are the 100mm skywatcher refractors and the ED80 reasonable contender as you can attach a camera as well?
Dob mounts are the easiest to use but I had a tough time getting it all on a plane with the normal baggage allowance, so was looking for a comparable refractor as a travel scope.
thanks