An early heads up for a solar eclipse
Posted 19/03/2015 - 17:27
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When shooting a sunset or sunny day at the beach you aren't pointing the longest lens you have directly (and focusing) on the sun.
If you point the wide end of a telescope at the sun and move it back and forward you will eventually get a beam of light concentrated enough to start a fire ... imagine that on your eyeball.
If you point the wide end of a telescope at the sun and move it back and forward you will eventually get a beam of light concentrated enough to start a fire ... imagine that on your eyeball.
Posted 19/03/2015 - 17:32
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Ahh right so its more to do with the focal length and point of focus, I'm safe to carry on doing sunsets with a DA15 them
Posted 19/03/2015 - 18:15
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mcpieman wrote:
Ahh right so its more to do with the focal length and point of focus, I'm safe to carry on doing sunsets with a DA15 them
I think you will be quite safe Ahh right so its more to do with the focal length and point of focus, I'm safe to carry on doing sunsets with a DA15 them
When I was living in Spain a few years ago I was tracking a bird with a 300mm lens and it flew past the sun. For some reason my panning faltered for a second and I got the full force of the sun come down the lens, through the camera and on to my eye ... it bloody hurt and since that day that eye has never been able to see as clearly as the other.
Posted 19/03/2015 - 21:08
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So a 10 stop ND isn't enough? I was thinking aout stacking the ones I have, which would be a 10, a couple of 4s, and a 3. No good?
The longest lens I'd have available would be 150mm.
The longest lens I'd have available would be 150mm.
Pentax hybrid user - Digital K3, film 645 and 35mm SLR and Pentax (&other) lenses adapted to Fuji X and Panasonic L digital
Fan of DA limited and old manual lenses
Fan of DA limited and old manual lenses
Posted 19/03/2015 - 23:15
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I was thinking of photographing the reflection of the eclipse in a bucket of water! Will I need to use a filter or anything? Thanks.
Posted 20/03/2015 - 07:08
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Don't use a bucket of water. It doesn't stop the amount of light, and you could still damage your eyes.
Better would be two pieces of A4 paper, make a 4mm hole in one. Set them up so there is about 60cms between the two sheets and you can safely watch and photograph the sun projected on the second sheet.
Never look directly at the sun or it's reflection in water, even when the sun is largely covered by the moon. It doesn't take much to permanently damage your eyesight.
We have heavy cloud here. I hope it clears up somewhat, but it isn't looking good.
Better would be two pieces of A4 paper, make a 4mm hole in one. Set them up so there is about 60cms between the two sheets and you can safely watch and photograph the sun projected on the second sheet.
Never look directly at the sun or it's reflection in water, even when the sun is largely covered by the moon. It doesn't take much to permanently damage your eyesight.
We have heavy cloud here. I hope it clears up somewhat, but it isn't looking good.
Posted 20/03/2015 - 08:49
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100% cloud cover here and no sign of it lifting.
Typical weeks of blue skies and sunshine, and today nothing but grey..
I hope the rest of you are having more luck.
Think I will have to book a trip to Namibia, or Tennessee.
Typical weeks of blue skies and sunshine, and today nothing but grey..
I hope the rest of you are having more luck.
Think I will have to book a trip to Namibia, or Tennessee.
Posted 20/03/2015 - 10:09
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Quite a lot of cloud cover, but meant I could have a go with ND's.
Cropped 10 stop ND
Uncropped 3 stop ND
Not great, but better than nothing.
Cropped 10 stop ND
Uncropped 3 stop ND
Not great, but better than nothing.
Pentax K-3, Pentax K-5.
Sigma 8-16mm f/4.5-5.6, Sigma 17-50mm f/2.8, Tamron 70-200mm f/2.8
Pentax DA 18-55mm f/3.5-5.6 WR, Pentax DA 55-300mm f/4.0-5.8
Pentax-A 50mm f/1.7, Pentax DA 50mm f/1.8, Pentax D-FA 100MM f/2.8 Macro WR, Pentax DA*300mm f/4.0
Sigma 8-16mm f/4.5-5.6, Sigma 17-50mm f/2.8, Tamron 70-200mm f/2.8
Pentax DA 18-55mm f/3.5-5.6 WR, Pentax DA 55-300mm f/4.0-5.8
Pentax-A 50mm f/1.7, Pentax DA 50mm f/1.8, Pentax D-FA 100MM f/2.8 Macro WR, Pentax DA*300mm f/4.0
Posted 20/03/2015 - 11:51
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As Mike said a hell of a lot better than we saw.
I see a trip to the US in my future
I see a trip to the US in my future
Posted 20/03/2015 - 14:44
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Mike-P wrote:
3 hours later and the sky is as blue as can be.
Here too. Grrr.3 hours later and the sky is as blue as can be.
Working on His Nibs for that trip to America
I can't see me getting him to Namibia or the Mauritius one and they are both probably fully booked anyway.
Don't think I'll be bothered by 2026 when the next one is due in the UK.
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130 posts
14 years
Westhoughton,
UK
And if shooting the sun can damage your camera, why do lens reviewers do just that to test for flare?