Custom Knife-Edge Baffles for the VSC/ SAO/ BGRP 127mm f/9.4 Refractor
  CD Baffles backed with .250" Luon Plywood Reinforcement Rings. - Click for an enlarge image.  
One of the most unique components of the 127mm f/9.4 "Brigadier General Richard Pierce" refractor is its knife-edge baffles. Made from old CD's and .250 luon plywood, when properly spaced inside the main tube, they should work tremendously in reducing stray light to aid in increasing contrast. Each of the four baffles will contour the objective lens' focus at specific points to allow for a 1.200" "Desire Field Size". The specified DFS is large enough to illuminate a standard DSLR's CCD. Thereby reducing vignetting at the outer edges of your astrophotography images. We will covered their construction within the preparation pages of the 127mm's overview in greater detail. Here is a link to a document which shows a minimum baffle arrangement method:

Click the arrow that points to the right to go to the next item's page of the OTA.