upside down
upside down
Hi everybody! Finally got my scope collimated with the help of rlow~! Million thanks to him, I have understood alot of things I would otherwise not fancy trying to find out myself. (Sorry about ur hand though) He explained everything in concise details and next time when I am more experienced, I would offer my help to newbies too! And now I am looking for a prism mentioned by rlow that it would correct the upside-down image when looking thru a reflector. What exactly is that and how much does it costs anyway? I would need that to do some scenary scouting during the day. Thx
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weixing
- Super Moderator
- Posts: 4708
- Joined: Wed Oct 01, 2003 12:22 am
- Favourite scope: Vixen R200SS & Celestron 6" F5 Achro Refractor
- Location: (Tampines) Earth of Solar System in Orion Arm of Milky Way Galaxy in Local Group Galaxies Cluster
Hi,
May be you can try a erecting tube to bring the image up-right. But I'm not quite sure will it work on a reflector, because a reflector may not have enough back focus.
Anyway, Sky-Watcher do have a erecting tube or erecting eyepiece, so you can ask jim or sam about it.
Have a nice day.
May be you can try a erecting tube to bring the image up-right. But I'm not quite sure will it work on a reflector, because a reflector may not have enough back focus.
Anyway, Sky-Watcher do have a erecting tube or erecting eyepiece, so you can ask jim or sam about it.
Have a nice day.
Yang Weixing
"The universe is composed mainly of hydrogen and ignorance."
"The universe is composed mainly of hydrogen and ignorance." 
Hi ursaMinor,
As discussed before, those straight-thru porro prism or 45 degree prism diagonal which produces erect images may not achieve focus in your Newtonian reflector. It is advisable to borrow one to try first before buying it (I don't have one).
Note also that some eyepieces and bino-viewer which require extreme focal point may also not be able to achieve focus in your type of scope.
As discussed before, those straight-thru porro prism or 45 degree prism diagonal which produces erect images may not achieve focus in your Newtonian reflector. It is advisable to borrow one to try first before buying it (I don't have one).
Note also that some eyepieces and bino-viewer which require extreme focal point may also not be able to achieve focus in your type of scope.