I posted this in the astrophoto section but haven't got an answer, hence my query here. Has any one used this item (or it's Orion / Celestron twins) for piggyback astrophotography? Is it any good? Thanks.
http://www.adorama.com/catalog.tpl?op=details&sid=10425104512240097&sku=PRO500
http://www.adorama.com/catalog.tpl?op=details&sid=10425104512240097&sku=PRO500