is my C6-SGT hyperstar / fastar compatible?
Posted 15 December 2009 - 09:38 PM
It would be totally sweet if my little scope is Hyperstar compatible. I'd have to rethink my planned acquisition of an 80ED for widefield imaging if so.
Posted 16 December 2009 - 09:28 PM
How do you like imaging with your C6 and Hyperstar? Do you have any images you've taken with the setup? Do you have any pictures of your C6 inself with the Hyperstar attached? What camera are you using with the setup? I'd be very interested in getting more info from you on the subject.
What are your thoughts concerning imaging at 290mm focal length? Are you guiding or can you get away with being unguided?
Posted 17 December 2009 - 03:21 AM
I have not worked a lot with the C-6 / Hyperstar combo. I was using a StellaCam III camera with it. I was a little disappointed with the image scale. You basically want to use it for wide field imaging. The above combination will give you about a 1 by 1.5 degree FOV so you would want to image larger objects such as the Rosette Nebula, the Veil Nebula, M31, M33, etc.
I do a lot of public star parties which is why I am partial to video imaging cameras. My standard setup is a C-8 with a f/3.3 focal reducer and a Mallincam color video camera. Jack Huerkamp will be trying the Mallincam with the C-6 / Hyperstar combo. Dean at Starizona told me that the MallinCam would be too large for the C-6 / Hyperstar. We will have to wait for Jack's results if I don't get a chance to try it.
If you are not interested in video imaging but standard CCD camera imaging, then you would want to get a camera whose cross section area would not exceed that of the C-6's secondary. I don't think there would be a need to guide as long as your images were within about a minute in length.
Posted 17 December 2009 - 10:22 PM
The Hyperstar C6 would be almost equivalent to my AT66ED refractor's focal length when coupled with my 0.8x focal reducer (320mm...f/4.8), except the f/ratio would be faster and I might get a little more resolution.
Posted 06 January 2013 - 05:16 PM
I don't know if it's compatible without an adapter of some sort. The instructions for the hyperstar lens say to unscrew the secondary mirror. However, on my C6 tube there is no way to unscrew the secondary without taking off the corrector plate.
Contrary to the video by Starizona (http://www.youtube.c...h?v=z4gj985zRns) there is no outer ring for the secondary mirror on the C6. The Starizona video is not using a C6.
Posted 06 January 2013 - 06:19 PM
Posted 07 January 2013 - 08:40 AM
Edit: removed incorrect info about fastar compatible removable secondary mirrors on the C6.
Posted 07 January 2013 - 10:33 PM
Posted 08 January 2013 - 01:24 PM
Yes C6s have removable secondary mirror assemblies. Later models are actually labeled "fastar" but even the earlier ones (from the mid 2000s) have the removable secondary. The ring on my black tube 2006 era C6 is not knurled, it's smooth and at first glance it doesn't look like it's removable ... but it is.
I've corrected my comment in the posting above.