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Produced to high standards by TS-Optics, the respected maker, this item is presently outstanding value for money. The Ts-optics Bahtinov Focusing Mask For Telescopes Up To 80mm Aperture For More Precise And Faster Focusing is now for sale for everyone to obtain at TelescopePlanet.org.uk at this excellent price.
Order this TS-Optics product today and get quick, dependable delivery directly to your front door.
TS-Optics Bahtinov Focusing Mask for Telescopes up to 80mm aperture for more precise and faster focusing
This CNC machined focus mask is made after the pattern invented by the Russian astronomer Pavel Bahtinov. The benefit of this focus mask over other solutions is that it is much easier to determine when perfect focus is achieved. This is of particular benefit during astro imaging with CCD or DSLR cameras.
The above image shows the diffraction pattern of a star out of focus, inside of focus and in perfect focus. When all diffraction spikes meet in the center of the diffraction pattern you have achieved perfect focus. This is much more accurate and significantly faster than the trial-and-error method otherwise used.
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