skywatcher evostar ed 80 v ed100

[iwols]

still looking any pros and cons please to go on my heq5 mount for astro thanks as always

[PeterCPC]

ED80 is F7.5 whereas the ED100 is F9. ED80 is therefore much quicker so better for imaging DSOs. ED100 would be better for planetary.

Peter

[JG777]

And the ED80 is a lot lighter so less stress on your mount.

[riklaunim]

And there is many more ED or APO refractors better than slow f/9 ED 100.

[RikM]

But the 100ED creams the 80ED for visual use. It depends what you want to do with it?

[Drop Of Sun]

If it is for DSO imaging (which I think it is looking at your recent posts?) then ED80 all day long. The ED100 (I have one) is more of a visual scope (and a very good one it is too!) than a DSO imaging scope.

You can still image with the ED100, but it's not the best choice at that aperture, most imagers would want a lower F ratio than F9. So for me the ED100 would only make sense for DSO imaging if you were mostly a visual person but wanted to do a little bit of imaging on the side (especially if you get it with the focal reducer/corrector included).

As Rik says it depends what you want to do. If it was for imaging or observing the sun (with solar safety filters) or moon I'd go for the ED100 over the 80, its extra aperture can help show finer detail at higher magnifications.