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Re: (meteorobs) Re: Reported Fireball Magnitudes
>At 11:15 AM 8/19/97 -0700, you wrote:
>>It would be interesting to get fish-eye results from other
>>locations. Something to think about in future years.
>>Ed
Lew wrote:
>Indeed it would, Ed! I'm still trying to locate a fish-eye arrangement for
>my old Miranda Sensorex camera... If I find one in time for the
>Quadrantids, I'll sure use it! Assuming, of course, I don't get clouded
>out... x^*
>
>Lew
Several years ago Spiratone sold a fisheye attachment lens that
screwed on like a filter on a normal lens. They were inexpensive, unlike a
real fish-eye lens which costs big bucks! Optically, I understand that they
were not the greatest, but they may work for this. Check your used camera
stores. Another alternative is to make an all-sky camera out of a chrome
convex Volkswagon hubcap. A normal camera focused at infinity is suspended
above the hubcap looking down at it. The convex hubcap converts the normal
lens into a fish-eye unit. There are examples of such systems in old back
issues of Sky & Telescope. This is basically the way the old auroral all-sky
cameras used during IGY worked. I've looked for a fish-eye attachment lens
but have been un-able to find one up here. You may be luckier! I
understand the Russians made one that wasn't half bad.
Ed
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Edward Majden epmajden@mars.ark.com
1491 Burgess Road Meteor Spectroscopy
Courtenay, B.C. http://www.serve.com/meteors/majden.html
CANADA V9N-5R8 Amateur Astronomy
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