Quote:
Originally Posted by Peter Ward
Hello Steve,
It all comes down to tracking accuracy vs focal length.
With Deep Sky imaging the longer the FL, the harder it is to get nice tight round stars. You can put an camera with a 16mm lens on a garden rock, expose for 30 seconds, and it will give you needle like stars.
Now you could argue garden rocks track "really well" but at 1600mm the rock just doesn't cut it 
My experience it at around 1800 to +2500 mm FL tracking inaccuracy really starts to hurt image quality.
On a tight budget I'd personally choose a G-8 or Vixen without the GoTo bells and whistles as they do nothing for imaging quality.
Suffice to say they are many, many views on this. I suppose the best way to sift through it all, is look similar subject matter, comparing the image scale, focal length and depth then try and compare "apples with "apples"
Cheers
Peter |
don't discount the garden rock...you never see one come up in the ice trade classifieds..people tend to hang on to them
