Originally posted by dcshooter why not adapt a 50mm SMC-M macro, take the nearly 300% extra reach over a "90mm equivalent," better baseline imaage quality over the Q zooms, and comparable price, and call it a day?
That's why I was playing with the SMC-M's. Many possibilities using existing lenses. Most M 28, 35 and 50mm lenses work very well.
The extra stand-off distance with the Q's ALMOST makes me not wish I hadn't sold my Adaptall SP 180/2.5
There is an AE extension ring set available for $90 USD -- search for "pentax Q extension ring".
I'd also note that a simple, compact bellows unit can serve as an adapter for ANY lens with a flange registration distance greater than the closed bellows plus 9.2mm if you can acquire or adapt a lens cap for mounting the lens and body -- ike this ST 105/2.8. The body mount here is a body cap with a hole in it epoxied into the rear plate. The full focus range from macro to infinity can be achieved -- just like a TLR or view camera with bellows focusing.