I've owned the Yashica FX-3 and I own a couple of K1000s. If you use the self-tmer on the Yashica, the mirror flips up when you press the shutter release button giving you a mirror lock up by default. The K1000 does not have a mirror lock up feature, but you can make the mirror flip up before the shutter trips by quickly 'flicking' your finger over the shutter release button and the mirror will flip up without tripping the shutter. I asked Eric Hendrickson who is probably the best person in the U.S. for repairing Pentaxes if this was alright and he didn't recommend it, the shutter speed chosen may not be accurate.
Peters8- You may want to consider the Pentax KX. It has the same body as the K1000 (which is similar to the Spotmatic) and has a mirror lockup function, a self timer and depth of field preview. You also can see the shutter speed selection and the f-stop in the viewfinder. They can can be obtained sometimes for less money (or not much more) than the K1000 because they haven't achieved the cult status of the K1000.
Last edited by Chrismat; 09-03-2012 at 09:49 AM. Click to view previous post history.