Big Sunspot

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Big Sunspot

Postby cybermystic » Tue Oct 21, 2014 1:56 pm

The missus kindly held up a piece of A4 paper for me in a howling gale while I projected the Sun's image onto it from an 80mm refractor with a 5X Barlow.
Impressive Sunspot.

ImageSunspot 21/10/2014 by cybermystic, on Flickr

ImageJust theSun by cybermystic, on Flickr

Greg
Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/
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Re: Big Sunspot

Postby 4xxxx » Thu Oct 23, 2014 1:00 am

This week I saw a TV doco on solar flares with the guys looking at them like you did on white paper. Not to many remember including me the 1989 complete blackout of the Quebec Provence caused by a solar storm.


Cheers
Last edited by 4xxxx on Sat Oct 25, 2014 12:10 am, edited 1 time in total.
Nikon D7000, Nikkor 80 - 400G, Nikkor 18- 200 VR II, f3.5-5.6.
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Re: Big Sunspot

Postby cybermystic » Fri Oct 24, 2014 2:53 pm

Meant to be one of the safest ways of imaging the Sun - but it isn't foolproof (me being the fool).
I was imaging the transit of Venus using this method and I wanted a bigger image of the Sun which meant a shorter focal length eyepiece.
No problem swapping over the eyepieces right?
Yes - provided you don't have your hand behind the eyepiece as you do the swap (think about it).

Greg
Nexstar 11 GPS, 2 x Sky 90, M25C, MaximDL, Photshop CS3, Noel Carboni's Photoshop actions, 7 foot Pulsar fibreglass dome, Canon 40D, 100mm macro lens, 28-200mm zoom lens, 17-55mm f#2.8 zoom lens, 100-400mm zoom lens, 1.4x converter, 2x converter.
http://www.newforestobservatory.com/
http://www.flickr.com/photos/12801949@N02/
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