Is this a case of "Pentax Stupid Model Number" confusion? VI: The *ist is a FILM camera. The *ist-D and *ist-DS are DSLRs. The DSLRs will use most any accessory ever made for Pentax cameras. The *ist uses very few, that's why I no longer own one.
Don > -----Original Message----- > From: Graywolf [mailto:[EMAIL PROTECTED] > Sent: Tuesday, April 05, 2005 3:48 PM > To: [email protected] > Subject: Re: Macro Extension Tubes > > > The *ist has no manual mode. The ext tube have not program mode. > Hence incompatable. > > graywolf > http://www.graywolfphoto.com > "Idiot Proof" <==> "Expert Proof" > ----------------------------------- > > > Village Idiot wrote: > > Thanks for your help Godfrey. > > > > > >>What do you mean, "extension tubes not work on DSLRs"? Of course they > >>work on DSLRs. > > > > > > I miss read the Pentax Japan website. It actually reads "This > accessory is not compatible with the *ist". > > > > > http://www.pentax.co.jp/english/products/filmcamera/accessory/inde > x35_closeup.html > > > > Which begs the question, why are most tubes incompatible with the *ist? > > > > Thanks again for your help. > > > > Derek > > > > > > > > > >>On Apr 5, 2005, at 10:39 AM, Village Idiot wrote: > >> > >> > >>>I have questions about macro extension tubes. Does anyone use > >>>extension tubes? On what on what lenses do you usually use them? > >>>What is the difference between using extension tubes and using a macro > >>>lens? Also, why do extension tubes not work on DSLRs? > >> > >>I use them, usually with a 50-135mm lens. I have the Pentax Automatic > >>set, which supports the lens' autodiaphragm operation but does not > >>transfer "A" exposure settings nor support auto focus. It essentially > >>makes any A, F, FA, DA or D-FA lens into an M lens. This is not > >>particularly convenient if the lens you're using doesn't have an > >>aperture ring, but the lenses I use with mine all have aperture rings. > >> > >>Using an extension tube is virtually the same as using a macro lens, > >>except that the latter usually support A mode and auto focus with the > >>current series macro lenses like the FA and D-FA models. Of course, > >>with an extension tube, the distances you can focus too are limited by > >>the lens' focusing helicoid in conjunction with the amount of tube > >>extension you've fitted. Dedicated macro lenses usually run from > >>infinity to 1:2 or 1:1 magnification steplessly. > >> > >>What do you mean, "extension tubes not work on DSLRs"? Of course they > >>work on DSLRs. > >> > >> > >>>I have always been curious about extension tubes and was thinking of > >>>purchasing some (maybe on eekbay). I thought I might try them out on > >>>flowers and bugs. > >> > >>I obtained a brand new set from an Ebay vendor for $75 or so. > >> > >>Pick up a copy of John Shaw's "Close Ups in Nature" for a good > >>introduction to macro work before spending money on extension tubes or > >>any other gizmos. > >> > >>Godfrey > >> > > > > > > > > > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > Version: 7.0.308 / Virus Database: 266.9.3 - Release Date: 4/5/2005 >
