Hi I have had one for a long time,but don't use it anymore because it is hard to read the charts because of the grain (I think thats what you call the stuff the paper is made of) most of us supernovae searchers use either computers with programs like The Sky Or deep sky CCD images and ARGO NAVIS or some other DSC,also most Supernova searches are done with CCD except the likes of Robert Evans or yours truly who do visual. If you are interested in Supernova searching? PM me and I may be able to help you get started. Regards astroron, I also have the Thompson galaxy charts and have used them for many years as well as many images downloaded from the internet astron:
