Hi Jos, On Mon, 8 Mar 2004 18:03:23 +0000 (GMT), Jos Peters wrote:
>I have a Pentax 6x7 and two lenses: 135mm and 105mm. >At a Photografica Market I bought two "tubes", each >with a turning ring, "Asahi Pentax 6x7 Japan"on it, >nr. 1 and nr. 2. I thought they were extension tubes, >but... They are ... >They fit on the body (by the ring), but the >lenses don't fit on the other side of the tube. There >is no connexion possible. >What is wrong? Your Lenses, in a way :-) The 6x7 actually has TWO bayonet mounts, a smaller INNER bayonet and a larger OUTER bayonet. The INNER one (which is quite similar to a K-mount) is used on most lesnses, and the OUTER one is used on some of the real big glass as far as I know. I only have lenses with the INNER bayonet too. There are two sets of extention tubes as well, there is a two-piece set for the OUTER bayonet that you seem to have, and a three-piece set for the INNER bayonet ... >Are they extension tubes or someting >else? Am I missing a component? >Who can help me? No one I'm afraid. You either need a large tele to use them on, or you need to other set of tubes ... Regards, JvW ------------------------------------------------------------------ Jan van Wijk; http://www.dfsee.com/gallery
