My theory is that they do all of than then simply discard the lenses.
That would account for the cost. ;)
At 09:36 AM 2/11/2003 -0500, you wrote:
Inspired by the best and cheapest lens thread, I was browsing lenses on
B&H, and saw extension tubes listed. And it looks to me like the cheapest
Pentax AF extension tube is the Tamron 1.4x teleconverter with lens
removed, for $50. The tubes without lenses cost around $150.
What in the world is up with that? Does it really cost that much more to
*not* grind, polish, coat, and install glass?
--
"A nice adaptation of conditions will make almost any hypothesis agree
with the phenomena. This will please the imagination but does not advance
our knowledge." -- J. Black, 1803.
Outside of a dog, a book is man's best friend.
Inside of a dog, it's too dark to read. --Groucho Marx
