Orion
®
PinPoint Telescope Focusing Masks
#40004 58-93mm; #40005 78-113mm; #40006 98-133mm; #40007 118-153mm;
#40008 138-173mm; #40009 158-193mm; #40010 178-213mm; #40011 198-233mm;
#40012 228-263mm; #40013 268-303mm
INSTRUCTION MANUAL
Orion PinPoint Telescope Focusing Masks will ensure you achieve a precise focus
for astrophotographic imaging. They take the guesswork out of finding the exact
focus point, which can be difficult when looking at stars on a DSLR’s small LCD
screen or on a laptop’s display when using a CCD camera. Whether you’re doing
planetary, lunar, or deep space photography, a PinPoint focusing Mask will ensure
that your images are sharply focused every time.
The grid cut into the PinPoint mask, which is placed on the front of your telescope,
produces three diffraction spikes when the telescope is aimed at a bright object,
like a bright star. Two of the spikes form an “X”, with the two lines intersecting on
the star, and the third spike moves back and forth across the center of the X as
the telescope’s focus is adjusted. Precise focus is achieved when the center spike
exactly bisects the X. It’s easy to see and correct small deviations from exact focus.
And the whole process takes just seconds!
Orion PinPoint focusing masks work with any type of telescope: refractor, reflector,
or Cassegrain. The sizes listed above for each mask indicate the range of diam-
eters they will fit (outer diameter of the telescope’s front cell or dew shield). Make
sure you carefully measure the diameter of your telescope’s front cell to determine
the correct mask to use.
HANDLE WITH CARE! This mask may crack if bent too forcefully. Keep it flat
when storing it and use care when handling and it will last indefinitely.
Figure 1.
An Orion PinPoint Telescope Focusing Mask
IN 586 02/17
