Orion PinPoint Telescope Focusing Masks
Orion PinPoint Telescope Focusing Masks
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Product Description
When placed over the front of a telescope, handy Orion PinPoint Telescope Focusing Masks make it easy to achieve quick and precise focusing without guesswork. Also known as Bahtinov masks, these focus aids feature a laser-cut slot pattern that produces a distinct, intersecting 3-line pattern once accurate focus is achieved in any type of telescope.
Orion PinPoint Focusing Masks will help astrophotographers save time and avoid frustrating, fuzzy results caused by slightly defocused exposures. With a PinPoint Mask installed on an imaging telescope, just focus on any bright star within or near the celestial object you want to photograph and adjust focus until the intersecting 3-line pattern is displayed indicating precise focus has been achieved. Wow, that was fast! Besides astrophotographic applications, PinPoint Focusing Masks are also useful for visual observations when fast, tack-sharp focusing is desired.
As focus is adjusted, the middle diffraction spike moves left and right of center of the "X" formed by the other two diffraction spikes. Precise focus is achieved when the middle spike is exactly centered in the "X" pattern. Image above displays diffraction pattern as seen on digital camera LCD or computer screen.
Three Orion-exclusive adjustable rubber-sleeved pegs equipped with thumbscrews clamp onto the outside of your telescope tube or dew shield to hold the PinPoint Mask firmly in place. Orion PinPoint Focusing Masks are easy to install and remove so you can achieve precise focus and quickly start capturing astrophoto exposures.
What's in the Box
Specifications
| Focusing Mask | Diameter Range | Fits: |
| 40004 | 58-83mm | StarBlast 62mm Compact Travel Refractor |
| 40005 | 78-103mm | ED80T CF Triplet Apochromatic Refractor |
| 40006 | 98-123mm | ED80 80mm f/7.5 Apochromatic Refractor, EON 85mm ED-X2 f/6.6 Triplet Apo Refractor, Orion 102mm Maksutov-Cassegrain Telescopes |
| 40007 | 118-153mm | StarSeeker IV 114mm GoTo Reflector, AstroView 120ST Equatorial Refractor, Orion 127mm Maksutov-Cassegrain Telescopes |
| 40008 | 138-173mm | EON 115mm ED Triplet Apochromatic Refractor, StarSeeker IV 130mm GoTo Reflector |
| 40009 | 158-193mm | EON 130mm ED Triplet Apochromatic Refractor, 6" f/4 Newtonian Astrograph Reflector |
| 40010 | 178-213mm | Orion 150mm Maksutov-Cassegrain Telescopes |
| 40011 | 198-243mm | Orion 180mm Maksutov-Cassegrain Telescopes |
| 40012 | 228-273mm | 8" f/8 Ritchey-Chrétien Astrograph, Premium 190mm f/5.3 Mak-Newt Astrograph, 203mm f/4.9 Reflector Telescope Optical Tube Assembly, Atlas 8 EQ-G GoTo Reflector, 8" f/3.9 Newtonian Astrograph Reflector |
| 40013 | 268-313mm | 10" f/8 Ritchey-Chrétien Astrograph, 10" f/3.9 Newtonian Astrograph Reflector |