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Shooting the Sun?

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Thread started 06 Nov 2008 (Thursday) 08:01   
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0ozma
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I was wondering if shooting the sun is damaging to your lenses or sensor? I've taken a few shots of dark clouds with the sun bursting directly through and it didn't seem like a problem, but I was wondering if anyone has any feedback.

Thanks!

Post #1, Nov 06, 2008 08:01:21


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Nighthound
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Bad idea to point any optics directly at the Sun, especially if it is not diffused at or near the horizon. Staring at a magnified Sun can damage your vision permanently in a very short amount of time. And yes, magnifying the Sun to a focal point at your camera sensor can create excess heating which could cause damage. How much magnification and length of exposure is too much? That depends but it really isn't an experiment worth making or risk worth taking. I always picture the results we got as kids with a magnifying glass under the bright sun.

Post #2, Nov 06, 2008 08:41:17


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A.S.I.G.N. ­ Observatory
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You can buy special solar filters that go IN FRONT of your lens. The silver type sheet that looks like aluminum foil lets you see the sun in it's natural color (white) and you will be able to see sunspots and the sharp limb of the sun.

A Hydrogen-Alpha filter is very expensive. This lets you see the outer layer of the sun, where you will see large solar prominences, flares and coronal mass ejections.

NEVER buy solar filters that attatch to eyepieces. They are dangerous and illegal. You MUST filter the sun's rays BEFORE they enter the lense.

Look up coranado scopes and solar filters for solar viewing and photography.

Baz.

Post #3, Nov 15, 2008 06:56:07 as a reply to Nighthound's post 8 days earlier.


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hollis_f
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A.S.I.G.N. Observatory wrote in post #6691256external link
You can buy special solar filters that go IN FRONT of your lens. The silver type sheet that looks like aluminum foil lets you see the sun in it's natural color (white) and you will be able to see sunspots and the sharp limb of the sun.

Yup, Baader solarfilm is a pretty cheap way of getting shots of the Sun. I cut a piece to the right size and embedded it between two UV filters for getting shots of an eclipse and of sunspots.

IMAGE: http://photos.imageevent.com/frankhollis/astropix/websize/sunspot.jpg
.

Post #4, Nov 15, 2008 13:12:12


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Celestron
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Did you take this today Hollis ? What equip , a lens and camera ?

Post #5, Nov 15, 2008 20:41:54




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zoeysmom
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i actually heard a story of a guy who left his 1D mounted on a tripod, sun hit it just right and burned up the sensor due to the reverse magnification of the lens

Post #6, Nov 15, 2008 22:45:09




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troypiggo
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Must have had his mirror locked up...

Post #7, Nov 16, 2008 00:53:26


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hollis_f
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Celestron wrote in post #6694672external link
Did you take this today Hollis ? What equip , a lens and camera ?

Thesunspot pic was taken about three years ago. Canon 20D, 70-300mm DO + 1.4x TC, Baader Asrofilm filter, f/8, 1/400s.

Post #8, Nov 16, 2008 01:39:57


Frank Hollis - Retired mass spectroscopist
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MacDogg
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I had my 4" celestron out one day looking at the sun and I started to wonder how hot the light through the eye piece would be unprotected.
I got one of those old steel/aluminum thermometers with the round gauge on top. I put the rod right in front of the eyepiece and the temp shot straight to 200*F and got stuck. I am not sure how hot it would have went to. It also melted a hole straight through a snowball in about 10 seconds!

Post #9, Nov 18, 2008 13:32:52


Noob. Bad eyes, good camera!
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0ozma
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Wow. thanks for the replies on this guys. Guess I'll steer clear of the sun!

Post #10, Nov 18, 2008 23:34:37


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troypiggo
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Didn't any of you guys burn/melt stuff with a magnifying glass when you were kids? ;)

Post #11, Nov 19, 2008 10:30:59


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Adrena1in
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I burnt things with a magnifying glass when I was young. But magnifying glasses are disposable...I wouldn't point my scope anywhere near the sun without my solar-filter attached. (The closests I'll ever get without the solar filter is when I try to shoot the earthshine on a nearly new moon.)

Post #12, Nov 20, 2008 06:30:10


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