|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
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