Quote:
Originally Posted by JohnH
Sorry I cannot agree with the other posts re the Vixen VC200L. It will give you an image scale of 0.49" per pixel by my reckoning, that seems a bit excessive to me given you are in suburban skies (2-3" seeing?) so you will need to use the FR all the time. This will in turn, in my experience, reduce the sharpness and flatness of your field. It also means you cannot replace the focuser except with (iirc) a very expensive unit from Starlight. Then there are the square stars from the fat spider - sure mill down the vanes - replace or at least motorise the focuser (the stock unit is crap for imaging - and locking it causes tilt) - use a FR, maybe change the tube and dovetail (both are light duty if you are going to use a guidescope, oh and if not you cannot use the Vixen OAG with the FR in place....)
Or get a scope that better matches your camera.
|
I should have mentioned that I do all of my deep sky imaging now with the VC200L using both a Canon 1000D (with 5.7micron pixels) and the Vixen f6.4 reducer. This gives me an image scale of ~0.91 arcsecs per pixel - probably still a little over sampled, but still workable.
I must admit that I missed the mention of the 60Da in the original post. I agree that a 60Da is not a good match with a VC200L at the native focal length (in fact the 60Da is not a good match to any of the long FL scopes that have been mentioned in this thread). I have found the VC200L with focal reducer to be a good setup for imaging, but agree that you need to have the right camera to suit.