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small_planetarium · Small or Portable Planetarium Group

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  • Members: 573
  • Category: Amateur
  • Founded: Mar 6, 2006
  • Language: English
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Messages 2030 - 2059 of 2350   Oldest  |  < Older  |  Newer >  |  Newest
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2030 Paul
pauldavidbourke Offline Send Email
Jun 2, 2011
1:43 am
Now we just need these lining the interior of a dome. http://www.engadget.com/2011/06/01/mitsubishi-creates-giant-oled-globe-for-tokyos-museum-goers-cl/...
2031 Jeff Skinner
fedora2k6 Offline Send Email
Jun 2, 2011
8:27 am
For several years now I have been dreaming of the LED/OLED dome, unhampered by the limitations of projection. Once the "electric" dome becomes reality I truly...
2032 kdconod Offline Send Email Jun 3, 2011
12:06 am
I think it was Terrance Murtag who first speculated on "active surface" domes. But one problem is the heat - LEDs when packed together like that actually...
2033 Karrie
bergieberglund Offline Send Email
Jun 4, 2011
12:09 am
* LIPS = Live Interactive Planetarium Symposium Hi all, I am delighted to announce that Go-Dome has become a sponsor of LIPS. We are honored that they are...
2034 Karrie
bergieberglund Offline Send Email
Jun 9, 2011
12:03 am
Hi all, We've just launched a kid-friendly pointer: It is NOT A LASER, but rather an LED (light emitting diode) pointer. The bright red arrow allows students...
2035 Manuel
valeraml Offline Send Email
Jun 11, 2011
1:17 am
Hello All, Just a quick question. We are in the process of adding a projector-spherical mirror system to our planetarium, we have a 9 m (30 ft) dome with a...
2036 Paul
pauldavidbourke Offline Send Email
Jun 11, 2011
1:24 am
... A comment ... as it happens if a projector works (focuses suitably) then it will work in any size dome. Dome size is mostly related to brightness. There...
2037 Patricia Reiff
patriciareiff Offline Send Email
Jun 11, 2011
12:44 pm
We use the Optoma 1060 in our portable domes, and it does fine up thru 6m with our Newtonian mirror system. 9m seems very very large for that brightness,...
2038 CharlesW
chas3701 Offline Send Email
Jun 11, 2011
12:46 pm
Hello Manuel, We have a 1080 working extremely well in a 9 meter dome, and since then a 1060 in a smaller dome. We understand that the 1080 has been withdrawn...
2039 Manuel
valeraml Offline Send Email
Jun 12, 2011
12:31 am
Thanks for your reply, Both projectors have the same lumens, the th1060 has a little better contrast 2500:1 vs 2200:1 for the tx1080. However as you pointed...
2040 Manuel
valeraml Offline Send Email
Jun 12, 2011
12:32 am
Thanks for your reply. It is good news, it means you are able to focus the 1060, which is one of the key factors. What size mirror do you have? If you don't...
2041 Manuel
valeraml Offline Send Email
Jun 12, 2011
12:32 am
Hi, Thanks a lot for your reply, Fortunately for us in the US, we can still find the tx1080 online for about $2000. However the th1060 is a newer projector...
2042 Patricia Reiff
patriciareiff Offline Send Email
Jun 12, 2011
2:54 am
The 1060 focusses well on both the Acril mirror and the Go-Vex mirror from Avela (the Go-Vex mirror is the same size as the Acril, but has a new special...
2043 CharlesW
chas3701 Offline Send Email
Jun 13, 2011
12:30 am
Hello again, You will have no difficulty focussing on the usual 24" mirror whichever source. Remember, you have to focus an image on the main mirror 400mm x...
2044 Karrie
bergieberglund Offline Send Email
Jun 13, 2011
12:30 am
Hi Manuel, You can use our Digitarium Gamma, Epsilon, or Kappa single fisheye lens systems next to a starball. We have an elevator mount specifically designed...
2045 CharlesW
chas3701 Offline Send Email
Jun 13, 2011
2:44 am
G'day All, Life is fun when it is full of debate ! We have naturally always stressed the advantages of mirror projection - we were first to offer it ! This is...
2046 Patricia Reiff
patriciareiff Offline Send Email
Jun 13, 2011
8:06 am
For the big domes, sure, the secondary mirror on the Newtonian isn't really necessary, but for travel with portables it really is super to have a smaller...
2047 Jack Dunn
spacecraftinc Offline Send Email
Jun 14, 2011
12:15 am
... Actually, there is a mirror system built by the Astronomical Society of Kansas City in the Gottlieb Planetarium in Science City's Union Station. That's a...
2048 Manuel
valeraml Offline Send Email
Jun 14, 2011
12:15 am
Thanks again. Regards, Manuel...
2049 Manuel
valeraml Offline Send Email
Jun 14, 2011
12:15 am
Thanks for the information Regards, Manuel...
2050 Will
w_h_s_y Offline Send Email
Jun 15, 2011
12:45 pm
Hi I'm having a new cover made for my dome and am planning to project directly on the inside of the cover rather than on the suspended screen I've used...
2051 Mario Di Maggio, DISC...
mario.dimaggio Offline Send Email
Jun 15, 2011
12:45 pm
Hi everyone Just thought some of you may be interested in free HD fulldome content (mainly trailers / previews) now available on our new Facebook Page: ...
2052 Paul
pauldavidbourke Offline Send Email
Jun 15, 2011
12:56 pm
... Here's a very rough approximation but it gives you an idea why low reflectivity is good. Imagine light incident on a portion of the dome, some of that...
2053 w_h_s_y Offline Send Email Jun 16, 2011
12:07 am
Great, that makes perfect sense. Now how does the 'gain' value given by screen manufacturers relate to reflectivity? It can't be 1:1 as I sometimes see gain...
2054 Paul
pauldavidbourke Offline Send Email
Jun 16, 2011
12:18 am
... For projection screens a gain of 1 is the reflectivity from a standard surface, magnesium carbonate from memory. The measurement is made for incident...
2055 Will
w_h_s_y Offline Send Email
Jun 16, 2011
10:40 am
Thanks!...
2056 Karrie
bergieberglund Offline Send Email
Jun 16, 2011
11:53 pm
* LIPS = Live Interactive Planetarium Symposium Hi all, Just a quick reminder that the LIPS registration fee will increase to $200 on July 2. If you're...
2057 Paul
pauldavidbourke Offline Send Email
Jun 18, 2011
1:56 am
... Thanks for coining the term "electric dome".... Seems like it is now installed, the last post showed it being cnostructed, the photo of the suspected dome...
2058 Jack Dunn
spacecraftinc Offline Send Email
Jun 18, 2011
2:30 am
... Arthur C. Clarke actually predicted a planetarium with an active surface back in the novel version of "2010" or it might have been "2061." Have to look...
2059 Karrie
bergieberglund Offline Send Email
Jun 22, 2011
10:12 am
* LIPS=Live Interactive Planetarium Symposium Hi all, I am pleased to announce that Audio Visual Imagineering is sponsoring LIPS. We look forward to learning...
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