the clamp is for Manual Focus mode to stop focus creep when you are eg, holding the camera lens down. The limit is for AF mode to stop the lens hunting all the way through the focal length to try and focus. I think the AF/MF setting overrides the camera's control but I am awy from home so can't look at the lens. I almost always have the lens in MF mode, since I almost never using AF for macro shots.
This is by far my favourite lens - great for macro of course and also for portraits but it will show all the wrinkles and spots on your subject! If you want some example shots see for example https://picasaweb.google.com/101251999616543812992/WoolCarderBee#5430979153996617218 Alastair On 5 December 2012 16:00, Larry Colen <l...@red4est.com> wrote: > > On Dec 4, 2012, at 6:48 PM, Daniel J. Matyola wrote: >> From the reviews, I understand that the lens "hunts" a lot in >> autofocus mode. The "focus range" control apparently alleviates that >> problem, by limiting the rage of focus. I am not clear, however, how >> to use the control. Also, why does this control have an "MF" setting, >> when manual focus is usually selected on the camera. Is there a >> difference between selecting manual focus on the lens rather than on >> the camera? > > Maybe the old cameras didn't have the easy selection between AF and MF? > > Maybe it just disables the drive altogether from the lens side. > >> >> Even more mysterious -- to me -- is the "clamp" dial. What does this >> do, and how? > > When you get the focus dialed on on the subject, assuming you are using a > tripod, you clamp the focus so that it doesn't change if you touch the lens. > >> >> Any information or advice will be greatly appreciated. >> >> TIA, Dan >> >> Dan Matyola >> http://www.pentaxphotogallery.com/danieljmatyola >> >> -- >> PDML Pentax-Discuss Mail List >> PDML@pdml.net >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > -- > Larry Colen l...@red4est.com sent from i4est > > > > > > -- > PDML Pentax-Discuss Mail List > PDML@pdml.net > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List PDML@pdml.net http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
