Rare Earth Plates for Breakfast?

Figure  1-3 A plate from the 20s, 30s, 40s.

I love to use old (vintage) camera lenses for my photography, but tend to stay away from the oldest ones.  Up through the sixties,  and (for some lens companies) – into the seventies and beyond – lenses were sometimes made with radioactive glass.  When this glass was marketed, the term “rare earths” was sometimes used to imply a glass additive or lens coating that contained thorium.

Read More …

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.