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Large partial solar eclipse March 20
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<blockquote data-quote="Binastro" data-source="post: 3169618" data-attributes="member: 111403"><p>. At about 1400 UTC today using a safely filtered telescope I saw a pair of medium-size sunspots to the right of the centre disc of the Sun through heavy cloud. I don't know if there were any smaller sunspots as the cloud was persistent and quite thick.</p><p></p><p>At about 1410 UTC today the cloud was a bit less thick, with sometimes about half of the sun's disc being cloud free.</p><p>I projected the sun's image onto the white kitchen wall using a very good quality 10×25 Docter binocular.</p><p>The two round very nice images of the Sun were bright. With a distance of about 30 cm between the eyepieces and the wall, the images of the Sun were about 3 cm across. Because of the persistent cloud I could not achieve critical focus. However, the clouds drifting across the disc were very nice to watch. I think that I should have been able to see the two medium-size sunspots, which might just be visible to the protected unaided eyes, but the cloud was too thick.</p><p>The limb of the Sun was slightly coloured. Maybe chromatic aberration and maybe because I didn't achieve perfect focus. Visually, the quality of the image with this binocular is very good normally.</p><p>It does help to have sunspots, as they are great aid to focusing.</p><p></p><p>One problem I did have was that it is difficult to keep the binocular very steady hand holding and looking at the images on the wall. But it is certainly good enough to have excellent views of a partial solar eclipse, where the changing size of the Crescent Sun would be seen very well.</p><p></p><p>After many days of cloud I have not been able to see the sun in a clear sky.</p></blockquote><p></p>
[QUOTE="Binastro, post: 3169618, member: 111403"] . At about 1400 UTC today using a safely filtered telescope I saw a pair of medium-size sunspots to the right of the centre disc of the Sun through heavy cloud. I don't know if there were any smaller sunspots as the cloud was persistent and quite thick. At about 1410 UTC today the cloud was a bit less thick, with sometimes about half of the sun's disc being cloud free. I projected the sun's image onto the white kitchen wall using a very good quality 10×25 Docter binocular. The two round very nice images of the Sun were bright. With a distance of about 30 cm between the eyepieces and the wall, the images of the Sun were about 3 cm across. Because of the persistent cloud I could not achieve critical focus. However, the clouds drifting across the disc were very nice to watch. I think that I should have been able to see the two medium-size sunspots, which might just be visible to the protected unaided eyes, but the cloud was too thick. The limb of the Sun was slightly coloured. Maybe chromatic aberration and maybe because I didn't achieve perfect focus. Visually, the quality of the image with this binocular is very good normally. It does help to have sunspots, as they are great aid to focusing. One problem I did have was that it is difficult to keep the binocular very steady hand holding and looking at the images on the wall. But it is certainly good enough to have excellent views of a partial solar eclipse, where the changing size of the Crescent Sun would be seen very well. After many days of cloud I have not been able to see the sun in a clear sky. [/QUOTE]
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Binoculars & Spotting Scopes
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Large partial solar eclipse March 20
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