What's the deal with those tubes sticking out of the L converters? Are the S converters the normal ones for 35mm?
I was looking at B&H's site. How much difference is there really between the Pentax 1.4x for $219.95, the Kenko 1.5x for $69, and the Tamron 1.4 for AF for $49.95? I've read the TC should be matched to the lens. I suppose in the near term I'd be using them on the 28-90mm and the 80-320mm, seems silly to pay more for the TC than I did for the lens. The Kenko and Tamron have autofocus, but if I lose a stop on an f/5.6 lens that may not matter. -- "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.
