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04/24/2003 04:01:00 PM · #1 |
BAMartin and I will be in Iceland while there's an annular solar eclipse. There are some articles that I've found photographing solar eclipses, but I was wondering if anyone here has any first hand experience and would like to give us some tips.
Specifically, what kind of "solar" filter do you need to use to protect your eyes and your equipment? Most articles are quite vague, I finally found a reference that a ND400 is needed, just wondered if anyone can confirm this or give me more info about that before I buy that filter.
Thanks :)
Message edited by author 2003-04-24 16:17:03.
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04/24/2003 04:22:37 PM · #2 |
I have actually gotten quite nice results using an IR filter. I can't remember exactly which one I have at the moment but I got great results with it on my 100-400mm lens.
What day/time is the eclipse going to happen?
Greg |
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04/24/2003 04:30:35 PM · #3 |
| I have some previous posts and links on this...I will try and look them up. |
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04/24/2003 04:37:36 PM · #4 |
Here's what I wrote in this recent thread.
It will take longer to research the other links...
Try searching the forums from last May or June, and at one of NASA's websites...I have to go to work soon.
Back when we had the eclipse last year I did some research on solar filtering. I work in a print shop where we use a high-density imagesetter film (around 4-4.5), meaning it passes about 1/10,000 the available light, and is particularly UV-opaque. I checked with someone at NASA who works in the field and he said that a density of 4.0 was sufficiently opaque for non-extended direct solar observation.
If anyone wants to experiment with this, check with your local print shop, or email me with a mailing address and I'll send you some -- we have about 3-4 pieces around 4x12 inches daily, which are otherwise "garbage."
Message edited by author 2003-04-24 16:38:39. |
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04/24/2003 04:47:43 PM · #5 |
this is what you need for the unaided eye Solar Viewers
there are a few types of Solar filters, Visual "white light" filters, just show the sun in the natural light no fancy flares or solar promice, but sun spots are visible. There are ones that you wear just like sunglases and ones for your binocs or telescope or your camera.
Then there are photographic filters which allow more light in than the visual.
The 2 filters above can be bought pre-made or you can buy just the film and make your own. But cost about $49 for a single sheet of 8 1/2 x 11.
And last and most EXPENSIVE are the H-Alpha filters (about $1,000.00 USD) but these allow to see the solar flares and promice.
Just remember to becarefull and enjoy the show.....
James
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04/24/2003 05:21:24 PM · #6 |
| Like I said, I'm willing to send anyone some density 4-plus UV-opaque film for the cost of a self-adressed stamped envelope. It makes a more blue-gray image (I think) than the orange, but it should allow safe viewing of the solar disk. |
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04/24/2003 08:16:44 PM · #7 |
here is an Image of the sun I just took using the photographic solar filter material.... just croped and a little sharpening....thats all
just used the camera, this is not through the scope...
Shutter speed: 1/180 sec
Aperture: f/9.5
Zoom (Focal length): 1100mm (equiv.)*
Exposure bias: +0.0 EV
Original image size: 3072 x 2048 Pixels
Flash used: No
Date picture was taken: 04/24/2003 (Thu)
Time picture was taken: 7:04 PM
Camera make: Canon
Camera model: Canon EOS D60
Message edited by author 2003-04-24 20:18:20.
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04/24/2003 08:27:11 PM · #8 |
Just goes to show - it's really quite boring, the sun, isn't it?
The full solar eclipse here a few years ago was excellent - the darkness is really creepy.
Enjoy yourselves
ed
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04/24/2003 08:37:41 PM · #9 |
When is the eclipse set to happen ?
I live in Iceland and would hate to miss it :)
I have been living here for many years and only seen two partial eclipses.
Are you talking about the time the sun does not set, or the time when we don´t see it at all?
Message edited by author 2003-04-24 20:38:22.
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04/24/2003 10:29:55 PM · #10 |
yes the sun is prettly lame unless you have an H-Alpha filter and can see the flares and stuff
here is some info on the upcoming eclipse
Nasa
James
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04/25/2003 09:58:05 AM · #11 |
Thanks all for your responses ... GeneralE, I'll send you an email later, I missed your post in the previous forum discussion :)
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04/25/2003 10:30:56 AM · #12 |
Originally posted by jab119:
here is some info on the upcoming eclipse
Nasa
James |
Yay, you found the analogous site to the one on the previous eclipse. Not only huge amounts of info, but they actually answer their emails if you have a question or suggestion...someplace they probably have a gallery of photos from the last eclipse which people submitted to them. |
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04/25/2003 01:02:54 PM · #13 |
I'm sure you'll prefer to use something a little more sophisticated than this, but I had pretty good luck with a rather unusual method of photographing an eclipse a few years ago.
I simply tore apart a floppy disk, and used the magnetic surface as my filter. It worked quite well!
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