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Photo Forum / Digital Photography / DSLR Cameras / August 2006Photographing the sun
Using a Canon Rebel XT and was wondering if this is difficult? Can I burn out the sensor if the solar filter doesn't work properly? Are there solar filters one can buy that are reasonably priced? Could one make one? I'm just using the 17-55 mm lens. But I thought if I could blow it up a bit I might get some sunspot detail. And certainly no camera shake as I could shoot at the highest shutter speed available. And should the aperture setting be in the middle for best optical quality? http://thehowzone.com/how/Sun_Photos > http://thehowzone.com/how/Sun_Photos OK - I realize I have to have a solar filter. Are they reasonable? Any good place to get them? 58 mm or larger I guess. > OK - I realize I have to have a solar filter. Are they reasonable? > Any good place to get them? 58 mm or larger I guess. We get ours from the Pop-Tart box. The Mylar wrapping is perfect for this task. Start off with two layers and see how that works for you. If you want to spend a few bucks you can get a "Shade 10" welding lens for about $5.00. Rita >> OK - I realize I have to have a solar filter. Are they reasonable? >> Any good place to get them? 58 mm or larger I guess. > >We get ours from the Pop-Tart box. The Mylar wrapping is perfect for this >task. Yeah, but all those calories just for a filter... >> We get ours from the Pop-Tart box. The Mylar wrapping is perfect >> for this task. > > Yeah, but all those calories just for a filter... How can you resist strawberry Pop-Tarts? Rita >> OK - I realize I have to have a solar filter. Are they reasonable? >> Any good place to get them? 58 mm or larger I guess. [quoted text clipped - 3 lines] > want to spend a few bucks you can get a "Shade 10" welding lens for about > Rita Please, please, please do NOT listen to CRAP advice like the above. Sun photography (astronomical or otherwise) is serious and DANGEROUS, both to equipment and to the eye. Check out any amateur astronomy equipment vendors for safe and satisfying solutions. >> We get ours from the Pop-Tart box. The Mylar wrapping is perfect >> for this task. Start off with two layers and see how that works for [quoted text clipped - 6 lines] > Check out any amateur astronomy equipment vendors for safe and > satisfying solutions. Correction, I should have said "shade 12" welding lens. Thank you for bringing this to my attention. The double layer Mylar is more than adequate. But, I agree with gnp that it's best to ask the "experts" that have been doing this a while. You might be surprised at what they use. Rita >>> We get ours from the Pop-Tart box. The Mylar wrapping is perfect >>> for this task. Start off with two layers and see how that works for [quoted text clipped - 5 lines] >Correction, I should have said "shade 12" welding lens. Thank you for >bringing this to my attention. Hahaha... > The double layer Mylar is more than >adequate. But, I agree with gnp that it's best to ask the "experts" that >have been doing this a while. You might be surprised at what they use. You can be such a b!t@# at times, but funny as hell at other times! I love it... :-) > > OK - I realize I have to have a solar filter. Are they reasonable? > > Any good place to get them? 58 mm or larger I guess. [quoted text clipped - 3 lines] > want to spend a few bucks you can get a "Shade 10" welding lens for about > $5.00. I would never test it with my eyes but I wonder how many layers would guarantee safety for the 350xt using a 17-55 kit lens? And should I block off the viewfinder? And I wonder if it filters all the suns rays uniformly? This is my biggest worry. I just went downstairs in my apartment building and somebody had left a potato chip bag there - shiny inside. I looked at a bright light and could barely see it. I could start with 4 layers I guess. Too bad its cloudy today. What a neat tip Rita. > And I wonder if it filters all the suns rays uniformly? This is my > biggest worry. And so you should!! The trap with solar viewing is that it may not be the visible light that damages (although it can, of course) - it's also the IR and UV components. There are substances/methods that will reduce the visible light, but not greatly affect the IR and UV - hence you (or your sensor) may feel safe while you burn...... Welders filter - of grade 12 or greater - does a reasonable job, but unfortunately it usually sucks optically. Take Roger's advice! >> > OK - I realize I have to have a solar filter. Are they reasonable? >> > Any good place to get them? 58 mm or larger I guess. [quoted text clipped - 14 lines] > could barely see it. I could start with 4 layers I guess. Too bad its > cloudy today. What a neat tip Rita. The sun is pretty small (when viewed from earth), so I'm not sure what you would see, even with a telephoto and the proper filter. I would guess if you really want great photos of the sun you should shoot through a telescope with the "proper" filters. I did take a photo of a total solar eclipse, which is very cool, but your not going to see a corona, or anything like that, without all kinds of special filters, or finding the next solar eclipse and praying for clear skies. > > OK - I realize I have to have a solar filter. Are they reasonable? > > Any good place to get them? 58 mm or larger I guess. [quoted text clipped - 3 lines] > want to spend a few bucks you can get a "Shade 10" welding lens for about > $5.00. Better invest in a white cane now. Also, welding glass is optical garbage. Go here, buy this: http://www.astro-physics.com/ BAADER AstroSolar > Using a Canon Rebel XT and was wondering if this is difficult? Can I > burn out the sensor if the solar filter doesn't work properly? Are [quoted text clipped - 4 lines] > And should the aperture setting be in the middle for best optical > quality? http://www.clarkvision.com/galleries/gallery.astrophoto-1/web/sun.c11.19.2003.v1 .4-800b.html The full aperture solar filter I use (5-inch diameter) is an Orion telescopes model and cost about $70. Try googling orion solar filters. I think Celestron also has them for a higher price. Roger > Using a Canon Rebel XT and was wondering if this is difficult? Can I > burn out the sensor if the solar filter doesn't work properly? Are [quoted text clipped - 4 lines] > And should the aperture setting be in the middle for best optical > quality? Hi, Cokin now do a filter that I think they call the Eclipse Filter, which is designed specifically for photographing the sun. You'll have to check the details, but I seem to remember it's optical density 5, or about 12 stops (please don't flame me if I'm a bit out on these figures - they're something like right). This would give you exposures of around 1/250 at f/8 and ISO100. Your biggest problem is going to be that you'll get a very small image with your lens. It will be less than 1mm on the sensor, so you'll not be able to get a lot of detail. You'd need a 35mm-equivalent of around 2000mm to fill the frame, so you should be looking for at least 400mm for a decent image size. Hope this helps. Mark > > Using a Canon Rebel XT and was wondering if this is difficult? Can I > > burn out the sensor if the solar filter doesn't work properly? Are [quoted text clipped - 18 lines] > this helps. > Mark I might be picking up a zoom that goes to around 180 mm (film) so that will help. I should get a teleconverter for oddball times like this. Its interesting: because the sun is so bright we assume its much bigger than it is. |
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