These early 18th century telescopes were constructed of cardboard, brass and finished with fishskin for extrodianary durability. Measuring over six feet long, it was fitted with a five element optical system including a single lens objective. The lenses were difficult to grind on a large scale, but the long focal lengths gave powerful images.  Pretty to look at, if you don’t get distracted.

Leave a Reply

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

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

Facebook photo

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

Connecting to %s

%d bloggers like this: