About this product
To accurately test and collimate telescopes, reflectors, catadioptric, and refractors, you must perform a star test. However, to do so, you need a star. Sadly, a real star is not always available due to poor weather conditions or location. Even when a star is available, you will need a good tracking system for doing star test as the star is always moving. Also air turbulence may affect your test, and the real star may not even reveal the true quality of your telescopes or give you a perfect collimation.
An artificial star is an excellent alternative. With an artificial star, star tests can be accurately conducted anytime and anywhere. However, the problem with a single artificial star is you need different telescopes require different star sizes, depending on the telescope’s aperture, and focal ratios. Even the same telescope when setup at different distances, and under different lighting environments, can require diffent star sizes.
Hubble Optics 5-star Artificial Stars features five bright white LEDs with 5 precision pinholes (50/100/150/200/250 microns). This enables you to star-test virtually any telescope, regardless of aperture size, focal ratio, distance, and lighting conditions. Simply choose the smallest possible star that still provides a clear and defocused image.
You can even adjust the brightness of the stars by twisting the LED cap!
And, you can mask any four of the five stars with the provided magnetic mask.
A clever solution, well executed.
Requires 3x AAA batteries (not included).
|Average Rating (10 Reviews): |
Saturday, 14 May 2022 | Neil
The look and feel is pretty cheap. I'd like to think the money went in to the front plate and the accuracy of the holes. The magnetic plate that blocks out the 'stars' will get lost very quickly. And suggest you think of a replacement before it happens.
Tuesday, 9 February 2021 | Michael
just arrived today
no opportunity to try it out
must get batteries
Thursday, 14 January 2021 | Robert
Looks a bit expensive for what it is but it does the job superbly.
Remarkably effective given the look and feel of it
Wednesday, 26 August 2020 | William
This might well be one of the cheapest collimation aids around, and it is pretty basic to say the least. You need to be careful putting the batteries in for a start, and the little rectangle that blocks all but one star falls out all too easily. Nevertheless it is remarkably effective. I have QDSLRdashboard on my iPhone connected to my Nikon Z6, and focused my C6 SCT on the artificial star, and walked round the front of the scope to fiddle with Bob's knobs while I recentred the star with the hand control after each adjustment while viewing the star image at maximum mag on my phone. After some bad moves I got the hand of it and got my concentric rings well nailed down. All done it daytime. I did it outside on a bright afternoon which was sub-optimal, but I got it done. £20 is a bit steep given the quality. I'd have been happier at £5, maybe £10.
Hubble Optics 5-Star Artificial Star
Thursday, 30 April 2020 | Ian
FLO have always been quick with delivery so top marks there. The Artificial Star has 5 different size holes in the lens and a supplied magnetic piece of tape covers over the 4 you don't require. The torch itself is plastic and on its own would be found in a pound shop, but if you want a higher spec unit they come in at +£70 so you pays your money etc. As it will only be used once in a while it does what it says on the tin and the rest of my Astronomy Group can make use of it as well, so money well spent.
Thursday, 5 December 2019 | Robert
I was very unpleasantly surprised when I held this item in my hand. Looked and felt like something I had just won at a fair on one of these toymachines for children.
It is terrible that this is sold at 19 £. Talking about a profit margin!
Wednesday, 23 October 2019 | T
I bought this as I needed to give a talk on telescope collimation and it seemed easier to do it inside with a non-moving star than outside. Its a basic and functional tool that nicely emulates a star to aid checking optics when there are no convenient stars around. The tool proved its worth as the following night. i took out my 20 inch reflector as the clouds was clearing and found my I had left the laser switched on after the talk on and flattened the batteries. With no batteries to hand I used the Hubble Optics to star align the main mirror.
The blanking plate should be slightly more magnetic as it would be very easy to lose in the dark. In summary, cheap but functional.
Light-weight and poor quality
Sunday, 18 November 2018 | Jonathan
Sorry FLO I love most of the stuff I have bought from you but this is a cheap, lightweight, plastic & badly made and the internal battery cage broke when inserting one of the three AAA batteries rendering it on the useless side.
Typical poor quality Chinese made product you regrettably sometimes see but not usually seen with the high quality astronomy products you generally stock. As I shipped it to my Spanish house it simply was not worth the postage to return it so will take the mulligan on this one. Reckon it is not worth more than £5... made for 20p. Buyers beware
Hubble 5 star telescope optics tester
Tuesday, 13 November 2018 | Raymond
No ON/OFF indicator and no instructions. Does it come with batteries or not. when unscrewing the only opener the LED arrangement falls out.
Hubble Optics 5-Star Artificial Star
Friday, 9 November 2018 | Paul
Excellent Item. Collimated my sct with this in twilight and tested later on actual star and was in perfect collimation. Much easier to use than real star. A lot cheaper than other brands and works great.
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