Hi, I've been recently reading the KMP for the who-knows-what time... but this time paying special attention to some details. There are several things I don't fully understand and so I need a bit of enlightement (I wasn't able to find the answers on the KMP). 1) the dental close-up lens and dental macro lens - you don't try to tell me they are supposed to take photos of one's teeth, do you? what is so special about them, that makes the name "dental" necessary? aren't they just ordinary close-up lenses and macro lenses? 2) "auto bellows (identical with auto bellows M and auto bellows A)" - is "auto bellows" a common name for "auto bellows M" and "auto bellows A" or rather the 3rd kind of the bellows - more like, say, "auto bellows K" (just like the lens series).? Does the auto bellows A support the A-series lenses' features, like KA-bayonet and "A" position on an aperture ring? 3) bellows unit III, macro focus rail III, copy stand III (and IIIp) - what does the "III" mean? Is it somethink like, say, Mk. III or something? 4) floating elements - the feature that appears several times with certain lenses. It has something to do with improving lens' performance at close distances but what exactly is it? 5) the AF/MF clutch in the SMC FA* 24/2 AL (IF) - I held this lens once and didn't notice any AF/MF switch (I might have missed it of course) so where's that clutch and what is it supposed to do? 6) the preset diaphragm in K 28/3,5 Shift - what does it mean? how does it work? I'll be more than happy if some of You can provide the assistance... TIA Regards Artur
