|reply to CylonRed |
Re: Cool pics of the sun from a backyard..
ND or PL filters should NEVER be used for viewing the Sun...period. They do not provide any UV or IR protection. The only safe way is to use a solar filter designed for visual use and is usually double aluminized polyester such as the kind called Baader Planetarium Solar Filter material.
And images like these are sometimes stacked to get full focus from the nearest part of the Sun to the edges. The filters used are highly specialized. However, imaging with them is hardly complicated.
The "regular" solar filters only reduce the intensity of light but do not show any surface or edge detail except for sunspots.