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Hubble Optics Hubble 5-Star Artificial Star
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The Hubble 5-star Artificial Star(s) are bright white LEDs with 5 precision pinholes (50/100/150/200/250 microns).
- Enables you to test practically all the telescopes of different apertures with different F ratios, from any reasonable distances needed, and under different lighting environment.
- The Hubble 5-star Artificial Star will provide you an excellent alternative mean to do the star test anytime and anywhere you want, without all the drawbacks of the real stars.
- Use the star test to fine-tune your telescope's collimation to its perfection.
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Hubble 5-star Artificial Star(s)
The star test is the ultimate method to test and collimate your telescopes. The most and
very much the only difficult part of doing the star test is that you need a star. Sadly, a real
star is not always available, and you really may not want to spend your precious
observation time doing star test even when it is available. Of course, you will also need a
good tracking system for doing star test with the moving star. After all the troubles, due to
the turbulence, the real star may not even reveal the true quality of your telescopes or give you a perfect collimation.
An artificial star will provide you an excellent alternative mean to do the star test anytime
and anywhere you want, without all the drawbacks of the real stars. However, the problem
with the artificial star is that you really need different size of artificial stars for different
telescopes of different apertures with different F/#, and even for the same telescopes but at different distances, and under different lighting environment.
The innovative Hubble 5-star Artificial Star(s) is a perfect solution to this problem. It has 5
bright white LEDs with 5 precision pinholes (50/100/150/200/250 microns). It will enable
you to test practically all the telescopes of different apertures with different F/#, from any
reasonable distances needed, and under different lighting environment.
We are not suggesting that you should stop using any other methods or any collimating
tools you feel comfortable with. You can continue your current practice, but after that always use the star test to validate or confirm your scope is indeed in perfect collimation; no other method (except the star test) can guarantee a perfect collimation. If your scope is still not in a perfect collimation after your current practice, you need to use the star test to fine-tune the collimation to its perfection. However, if you do not have any other collimating tool yet, then a star test with Hubble 5-star Artificial Star(s) alone will enable you to reach a perfect collimation with your telescopes.
Hubble 5-star Artificial Star(s) Advantages...
- You can instantly find out which star is best for your particular telescope at that particular distance under that particular lighting environment by simply choosing the
smallest possible star, but which still give you clear defocused image.
- You can even adjust the brightness of the stars by twisting the LED cap.
- You can mask out any 4 of the 5 stars with a provided magnetic mask.
- Please make sure the cleanness of the mask, and use it only when needed to prevent the blockage of the pinholes.
- The unit should be kept in a clean Ziploc bag when not used; separated from the magnetic mask.
- It is powered by 3 AAA batteries (Not Included).
Hubble Optics Product Number: HB5ST0002
User Reviews
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Review Date: 4/22/2010
Reviewed By: C Croulet
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Hubble artificial star
It's only 25 bucks, compared to $120 for the competition, and that must be factored into my comments. Having five stars to choose from isn't very important to practice, and the five diffraction patterns overlap confusingly. I had to block off the superfluous stars with electrical tape. |
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