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mloffland

*****

Reged: 09/03/04

Loc: Norman, Oklahoma
Hubble 5-star Artificial Stars new
      #3721045 - 04/02/10 03:12 PM

Hubble 5-star Artificial Stars

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7331Peg
Sirius Observer
*****

Reged: 09/01/08

Loc: North coast of Oregon
Re: Hubble 5-star Artificial Stars new [Re: mloffland]
      #3723092 - 04/03/10 06:41 PM

Very nice looking refractor you've got there, Bill. You've got excellent taste!

As far as the Hubble 5-Star goes, I've been using mine to check collimation on several 60mm refractor lenses. I was thrilled to find the results of tests outside at night matched what I was getting inside the house in the daytime. Really is an excellent tool at a very reasonable price.

John


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mikiek
Pooh-Bah
*****

Reged: 10/10/07

Loc: SE Texas
Re: Hubble 5-star Artificial Stars new [Re: mloffland]
      #3723600 - 04/04/10 01:05 AM

Glad it's working for you. I guess the short FL of your scope allows you to use a relatively short distance. With my 11" SCT the thing is pretty much useless. I have to get the light upwards of 100' away to even have a chance of it working.

Walking into a neighbors yard at night (2 houses down) to get the light situated ain't cool.


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Jim7728
Postmaster
*****

Reged: 04/10/05

Loc: Stoop Landing Observatory, NYC
Re: Hubble 5-star Artificial Stars new [Re: mikiek]
      #3723948 - 04/04/10 09:58 AM

Great tool to have, especially for those who do not use a driven mount and have less than steady skies when attempting a star test.

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jimarshall
sage
*****

Reged: 03/20/07

Loc: Virginia
Re: Hubble 5-star Artificial Stars new [Re: mloffland]
      #3724451 - 04/04/10 03:27 PM

It's the best astro tool that I ever bought. For the first time, I could actually see the airy disc and get perfect collimation on my SCT, however when I raised the scope from the horizon position to the sky, it was off again due to the slight mirror shift. It did prove however that perfect collimation was possible and not really all that hard when you can actually see the star patterns that are described in the various articles on collimation. In my opinion, it looked much better than a real star.

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Joe Lalumia
Postmaster
*****

Reged: 01/24/07

Loc: Quinlan, Texas, USA
Re: Hubble 5-star Artificial Stars new [Re: jimarshall]
      #3727020 - 04/05/10 07:47 PM

Guess I am going to have to figure out how to mount this up in a tree! to avoid mirror shift on my LX90.

Bought one but have not used it yet. Still in the box. Thanks for reviewing this.

Edited by Joe Lalumia (04/05/10 07:48 PM)


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doctordub
Pooh-Bah


Reged: 01/11/06

Loc: New Rochelle, New York
Re: Hubble 5-star Artificial Stars new [Re: Joe Lalumia]
      #3728092 - 04/06/10 11:08 AM

I open a window of a bedroom on the third floor of my house and use a camera tripod to hold it outside the window. I aim my telescope from my backyard as it is lower than the frontyard( added height of walk out basement) at a 50 degree angle to collimate my two CATs.
CS


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donjoy
sage
*****

Reged: 01/26/10

Re: Hubble 5-star Artificial Stars new [Re: doctordub]
      #3734292 - 04/09/10 09:50 AM

HI i just bought this lite but have not used it yet.i asked the dealer(2nd time)as to the return policy.i was at a well known lumber outlet yesterday and came upon some flashlights on sale,three in a pack for 9.99,when i looked at it,they are the same as the hubble5star except for the thin plastic with the holes at the front of the light.i thought HEY I could have made this myself.am i missing something here. Don

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hudson_yak
Carpal Tunnel


Reged: 11/15/07

Loc: Hyde Park, NY, USA
Re: Hubble 5-star Artificial Stars new [Re: donjoy]
      #3734383 - 04/09/10 10:37 AM

It's steel (the mask is magnetic, remember), and drilling precisely round holes of those sizes is pretty tricky. I read somewhere they use a laser to cut them.

Mike


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donjoy
sage
*****

Reged: 01/26/10

Re: Hubble 5-star Artificial Stars new [Re: hudson_yak]
      #3735100 - 04/09/10 03:34 PM

cool-thanks,now i don't feel like i wasted my money.at least i know where to get extra flashlights. Don

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deSitter
Still in Old School


Reged: 12/09/04

Re: Hubble 5-star Artificial Stars new [Re: donjoy]
      #3736224 - 04/10/10 07:54 AM

Keep in mind that this gizmo must be far away to test optics. Otherwise SA will appear that is an artifact of the near target.

-drl


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morden8uk
professor emeritus


Reged: 03/01/05

Loc: Southampton, England
Re: Hubble 5-star Artificial Stars new [Re: 7331Peg]
      #5146511 - 03/29/12 05:31 AM

Quote:

Very nice looking refractor you've got there, Bill. You've got excellent taste!

As far as the Hubble 5-Star goes, I've been using mine to check collimation on several 60mm refractor lenses. I was thrilled to find the results of tests outside at night matched what I was getting inside the house in the daytime. Really is an excellent tool at a very reasonable price.

John




Sorry to dig up an older thread.. I'm hoping this tool (if still available) will be ok to check my WO 66SD which I think is off!!.. William Optics have suggested an artificial star to check it.

Thanks
Rob


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jimarshall
sage
*****

Reged: 03/20/07

Loc: Virginia
Re: Hubble 5-star Artificial Stars [Re: morden8uk]
      #5147507 - 03/29/12 04:42 PM

Quote:

Quote:

Very nice looking refractor you've got there, Bill. You've got excellent taste!

As far as the Hubble 5-Star goes, I've been using mine to check collimation on several 60mm refractor lenses. I was thrilled to find the results of tests outside at night matched what I was getting inside the house in the daytime. Really is an excellent tool at a very reasonable price.

John




Sorry to dig up an older thread.. I'm hoping this tool (if still available) will be ok to check my WO 66SD which I think is off!!.. William Optics have suggested an artificial star to check it.

Thanks
Rob



I prefer the cheshire collimation eyepiece for refractors. you can do it indoors, during daylight and without the need for a lot of space.
http://spacealberta.com/equipment/refractor/collimate.htm


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