#1  
Old 11-11-2011, 12:01 PM
Joshua Bunn's Avatar
Joshua Bunn (Joshua)
Registered User

Joshua Bunn is offline
 
Join Date: Oct 2011
Location: Albany, Western Australia
Posts: 1,459
2'' diagonal with imaging

Hi All,

With the issue of camera clearence through the fork when imaging near the celestial pole, has anyone tried using a diagonal mirror after a feathertouch focuser (eg, moonlight or starlight) then the imaging camera into the diagonal. If so what sort of results does it produce?

I have a LX200 ACF 12" and am in the process of deciding on a moonlight or starlight instruments feathertouch focuser. Im using the meade 2'' 99% reflectivity diagonal purchased about 6 months ago.

Also, starlight instruments offer a short adapter to go from the 3.27" rear cell to the feathertouch focuser, is there a disadvantage with this shorter option over the longer option? Im thinking about in terms of achieving focus and clearing the fork base.
here is the link to the short adapter (http://starlightinstruments.com/shop...8e89350fb52901 http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== ) and its respective feathertouch focuser (FTF 2008BCR 2") and here is the link for the longer adapter (http://starlightinstruments.com/shop...8e89350fb52901 http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== http://www.iceinspace.com.au/forum/d...9Af0J5EwgAOw== ) and its respective focuser (FTF 2015BCR 2'').

Comment welcome.

thanks
Josh
Reply With Quote
  #2  
Old 12-11-2011, 05:43 AM
Poita (Peter)
Registered User

Poita is offline
 
Join Date: Jun 2011
Location: NSW Country
Posts: 3,586
I've used a diagonal, the main issue was achieving focus and getting it square, it can work okay, but is an additional point where movement can creep in.
Reply With Quote
  #3  
Old 12-11-2011, 11:15 AM
Joshua Bunn's Avatar
Joshua Bunn (Joshua)
Registered User

Joshua Bunn is offline
 
Join Date: Oct 2011
Location: Albany, Western Australia
Posts: 1,459
Thanks Peter, what seemed to be the problem with achieving focus?
Reply With Quote
  #4  
Old 12-11-2011, 12:18 PM
Marke's Avatar
Marke (Mark)
Registered User

Marke is offline
 
Join Date: Nov 2009
Location: Sydney
Posts: 1,193
It will use up a lot of back focus probably as much as 2" .
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 01:00 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Testar
Advertisement
Bintel
Advertisement