Thinking about getting the Burgess binoviewer. What do I need to make them work in my XT10i?
Larry
Larry
What Do I Need?
Started by larryinca, 06/11/2005 12:32AM
Posted 06/11/2005 12:32AM
Opening Post
Posted 06/11/2005 01:36AM
#1
Larry,
An XT10 does not have the range of focus to use the Burgess binoviewers by themselves. You will need an Optical Corrector or at the very least a Barlow. A Barlow by itself will result in a very high magnification factor. This is because the eyepieces are located so far from the Barlow lens. A Burgess binoviewer has a light path of 100mm. A combination of a Barlow and a focal reducer will work. The quality will be hit or miss.
A while back I posted a message on how to make your own OCA.
https://www.astromart.com/forums/viewpost.asp?forum_post_id=313188&poll_id=&news_id=&page=2
Siebert Optics makes an OCA specifically made to work with the Burgess and most reflectors. They also make a Multimag adapter that will work with reflectors and refractors alike.
If you have an SCT you do not need an OCA to reach focus. Also since a Burgess binoviewer has such a short light path, some refractors will focus without an OCA.
I have a TAK FS-128 and I can use my Burgess binoviewer without any corrector. I also have an 8" Orion Atlas and half of an XT10. These need an OCA to reach focus.
Don Durbin
An XT10 does not have the range of focus to use the Burgess binoviewers by themselves. You will need an Optical Corrector or at the very least a Barlow. A Barlow by itself will result in a very high magnification factor. This is because the eyepieces are located so far from the Barlow lens. A Burgess binoviewer has a light path of 100mm. A combination of a Barlow and a focal reducer will work. The quality will be hit or miss.
A while back I posted a message on how to make your own OCA.
https://www.astromart.com/forums/viewpost.asp?forum_post_id=313188&poll_id=&news_id=&page=2
Siebert Optics makes an OCA specifically made to work with the Burgess and most reflectors. They also make a Multimag adapter that will work with reflectors and refractors alike.
If you have an SCT you do not need an OCA to reach focus. Also since a Burgess binoviewer has such a short light path, some refractors will focus without an OCA.
I have a TAK FS-128 and I can use my Burgess binoviewer without any corrector. I also have an 8" Orion Atlas and half of an XT10. These need an OCA to reach focus.
Don Durbin
Funding Member
