View Single Post
  #16  
Old 28-02-2005, 11:25 AM
coxellis's Avatar
coxellis
Member

coxellis is offline
 
Join Date: Feb 2005
Location: Newcastle-upon-Tyne, UK
Posts: 33
There was a guy in the UK who inadvertently took his glass Ha filter off the front of his scope whilst it was still pointed at the sun. It melted the surface of his secondary mirror and burnt a hole through the ccd chip in his cam.

I use a baader film mask and even at 99.7% block, I had to make the aperture only 3" to get the camera to work with it as with a full 8" aperture mask, the exposure time needed was too fast.

These eyepiece solar filters should be banned outright - they're just damned dangerous.

Andy