Paired Sharpening Masks
great aspect of double star, and lunar and planetary observing is
the availability from suburban skies. Enjoy fun targets any good night
without seeking darker skies.
your Newtonian/Dobsonian's performance to produce sharp refractor-like
views is completely within reach! Our custom masks achieve a clear
aperture, eliminating diffraction spikes from your telescope's spider,
curing for possible image softening turned down edge (TDE),
and preventing distortion from intruding mirror retaining clips.
We will custom cut a mask that hides the the mirror retaining clips,
and create a custom sized aperture mask, providing a clear, perfectly
round uninterrupted aperture. This will give crisp clean views and
fine details on the Moon and planets, and round spike free image for
splitting tight double stars.
Mirror masks are laser cut 1/8" thick black acrylic, stiff, light
weight with a non-reflective matte side. Long slots to the
diameter of your mirror allow precise centering to the mirror edge.
Attach to mirror clip tops with Velcro dots or similar using small
notches for positioning.
masks are laser cut ultra-light weight sturdy 0.035" thick Formica
909-42 Crystal laminate. Dimensioned to fit to your outer tube diameter,
center hole cut if you have a protruding spider stalk. Maximum mask
aperture opening computed based on your secondary size and spider