Sunday, September 16, 2007
VATT
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Dave let me borrow his 8mm fisheye lens, so I put it to good use to take some pictures of the VATT telescope. The telescope has a 1.8-m f/1 primary mirror, making it a very short telescope in a very small dome. The building it is housed in is one of the prettiest I've seen at an observatory with a lounge and kitchen and 4 dorm rooms along with the control room, all in the same building with the telescope. This image was taken at 8mm focal length with an exposure of 30 seconds at f/8, ISO 400 with some painting of the telescope and dome with my LED flashlight.
A frequent photoblog with select favorites of my photographs. Subjects are typically nature, landscape, astrophotos, existing light.
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2007
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September
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- LBT and SMT in twilight
- LBT in twilight
- B&W LBT in twiight
- Anticrepuscular rays & the LBT
- VATT at work
- SMT & LBT
- Fisheye VATT
- MGIO in Moonlight
- LBT at sunset
- VATT take 3
- VATT take 2
- Satellite & Clouds at the VATT
- VATT
- The Large Binocular Telescope (LBT)
- The best telescope on the Mountain
- Cloudy sunset
- T-storm over Mexico
- I Toad you, it's not a Frog!
- MQF Interior
- MQF
- Enterprise
- Spacewatch Sunset
- Domes at sunset
- Thunderstorm Sunset
- B&W Lizard
- Meteor & Mars
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September
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5 comments:
that lens is very nice! almost no CA!!!
BTW, you were observing at that 1.8m scope? f/1 is terribly fast! :P omg
The primary mirror is f/1, but I think the secondary makes the telescope effectively f/9.
oh, I see, you were talking about only the primary mirror. So its not the prime focus system as the 36" at the KP right? I guess its usual in catadioptric systems to have mirrors faster than f/2.5.
Yes, that's right. The telescope is a Gregorian design. Perhaps you could search the Steward Observatory website to find some information on the optical design of the VATT.
do you know that you're talking to an operator of the 21" @ steward..... :D
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