Erect Image Diagonals

 
Post new topic   Reply to topic    Optics Planet Forum Index -> Telescopes
Author Message
Amelia



Joined: 31 Dec 2007
Posts: 4
PostPosted: Mon Dec 31, 2007 11:57 am    Post subject: Erect Image Diagonals Reply with quote
I recently purchased a 45 degree erect image diagonal for my telescope. My telescope is a Celestron PowerSeeker 114mm Newtonian reflector. Focal length is 900mm. Focal ratio is 8. Mount is German equatorial. I use a K20mm eyepiece. I am able to focus on an image like a fire hydrant when I use only the 20mm eyepiece. However, when I add the diagonal to the eyepiece I cannot focus on the image...everything is blurry. The diagonal is a Celestron. Can you give me some advice about this. Did I purchase the wrong diagonal or do I need to be doing something different. Thanks!
Back to top
View user's profile Send private message
Jne_K
Site Admin


Joined: 24 Sep 2003
Posts: 5512
PostPosted: Mon Dec 31, 2007 12:00 pm    Post subject: Reply with quote
Hi

Reflectors cannot use a standard image erecting prism. You must use one specifically made for a reflector. The only such erecting prism we carry is the Zhumell
_________________
Thanks for posting with us
Joanie K - Your personal optics expert

Forum: http://www.opticsplanet.com/msgboard
Blog: http://blog.opticsplanet.com/
Store: http://www.opticsplanet.net/

Phone: 847-513-6201
Fax: 847-919-3003
Back to top
View user's profile Send private message Visit poster's website
Amelia



Joined: 31 Dec 2007
Posts: 4
PostPosted: Mon Dec 31, 2007 12:21 pm    Post subject: Thank you for your assistance! Reply with quote
Thank you for the advice!
Back to top
View user's profile Send private message
Jne_K
Site Admin


Joined: 24 Sep 2003
Posts: 5512
PostPosted: Mon Dec 31, 2007 12:38 pm    Post subject: Reply with quote
You are very welcome.
_________________
Thanks for posting with us
Joanie K - Your personal optics expert

Forum: http://www.opticsplanet.com/msgboard
Blog: http://blog.opticsplanet.com/
Store: http://www.opticsplanet.net/

Phone: 847-513-6201
Fax: 847-919-3003
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Optics Planet Forum Index -> Telescopes All times are GMT - 6 Hours
Page 1 of 1