St80 vs Canon 100-400

[edarter]

Hi,

I have a Canon 100-400 mk1 that I use for general photography and a SW ST80 which I use as my guide scope on my main rig. I'm wondering if there is any point in using the ST80 as a travel scope attached to my star adventurer pro for holidays when it seems very similarly spec'd to the Canon lens which I could also mount on the SAP. Either would be used with my dslr, though I would have the option of also using my ZWO 120 MM Mini with the scope I guess.... Thoughts and advice welcome! 

Thanks

Edited June 25, 2020 by edarter

[Alien 13]

I would think the Canon lens would be far better, probably up to high end APO standards and maybe a bit more as not many 400mm scopes will cover a full frame imaging circle.

Alan

[happy-kat]

And I think you can get an adaptor to connect the lens to your zo camera. The lens theoretically would have better star image quality across the frame and less chromatic aberration but you can't use it to observe with.

[edarter]

OK, thanks for the replies, sounds like I would be better off with the lens!