I have a Jupiter-9, but it doesn't seem to be that uncommon, at least amongst Pentaxians. One lens I have that I haven't heard anyone mention is the Toyo 28mm f/2.8. It's a tiny (like the FA 50, but lighter), unassuming lens that delivers impressive pictures. It spent a few months as my walk-around lens on the K10D and it served me well. Here's the lens itself:
And these are some of the pictures it took while we were visiting Los Angeles...
Walt Disney Concert Hall (excuse the dust bunny
)
...Rome...
Roman Tangerine
...Cambridge, MA...
On the Other Side
...Madrid...
Embalse de Valmayor
Unfortunately, I am selling this lens, as I need to raise funds for the Sigma 24mm f/1.8 (I really want/need the extra stop). It's a shame, because the Sigma probably weighs 5 times more and won't fit in my pocket. If anyone is interested in the Toyo, let me know.
By the way, great thread Steve. People often get stuck in the rut, believing that only the famous brands have good glass, while there are thousands of fine lenses out there, unused, just because they don't have a big name written on them.