View Single Post
  #4  
Old 01-09-2012, 03:23 AM
pmrid's Avatar
pmrid (Peter)
Ageing badly.

pmrid is offline
 
Join Date: May 2008
Location: Cloudy, light-polluted Bribie Is.
Posts: 3,747
Quote:
Originally Posted by Tandum View Post
Sorry Pete, they only do 50mm and 50.8mm unmounted carouels. These baader filters are 50.4mm and going by the sx wheels I have owned, tolerances are really close in the filter size department.

Besides, I want QHY to fix it not for me to buy another wheel

Squeek Squeek ....
Another quirk I've found with unmounted filters is that some - Astronomic Ha 12nm for example are onlt 1mm thick glass substrate and the well in the SX filter wheel is 2mm deep so you have to either fake an O-ring somehow or find some other way to pad the filter out so the retaiing screws will hold it. I imagine this is a problem with many FWs - not just SX.
Peter
Reply With Quote