Solar eclipse tips?

Started May 19, 2012 | Discussions thread
Sean Nelson
Veteran MemberPosts: 9,439
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Re: No corona
In reply to Vlad S, May 19, 2012

Klarno wrote:

if you're going to see any corona at all (not sure if that's a possibility even if if you're in the direct path of an annular eclipse like this) you'll need to have no filter whatsoever.

Vlad S wrote:

There will be no corona because the visible part of the sun will completely wash it out. The visible rim is just as bright as the rest of the disc, so when it creates a hot spot on the sensor the difference will be in the shape of the damage, not in the degree. Treat partially eclipsed sun exactly as you would full sun.

ABSOLUTELY TRUE!

Unfortunately I've seen media articles talking about this eclipse that include photos of a total solar eclipse with a full corona - which implies this eclipse will be the same.

IT WILL NOT BE.

During this eclipse the sun will never be fully covered , so looking at it directly or through an optical viewfinder can cause serious eye damage or even blindness if you look for too long.

You'll need a long telephoto (at least 200mm in terms of 35mm FOV) to get the sun's image large enough to see a decent disc. To prepare for the eclipse, try taking some shots of the sun at various exposures ahead of time. The sun will be just as bright during the eclipse as it is today, except that you'll see a bite out of the disc before and after the maximum, and a large central "hole" in the disc at maximum.

You're not looking to get the sun's disk "properly exposed", just try to get an exposure that cuts the brightness down enough so that you can see the disc clearly without being obscured by the glare.

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