> On Jun 14, 2016, at 9:55 AM, Stanley Halpin <[email protected]> > wrote: > >> >> On Jun 13, 2016, at 6:33 PM, Igor PDML-StR <[email protected]> wrote: >> >> What's the meaning of PLM and RE? >> Does this lens have just an electronic aperture control or a dual one? >> >> What happens if the lens is attached to an older camera, say k-5? It stays >> wide open? >> >> Igor >> >> Sent from mobile phone >> >> >> Mark Roberts Mon, 13 Jun 2016 12:52:27 -0700 wrote: >> >>> http://www.dpreview.com/news/8852527391/affordable-reach-ricoh-announces-pentax-55-300mm-f4-5-6-3-lens >> >> >>> Apparently the new Pentax "DA 55-300mm F4.5-6.3ED PLM WR RE" (whew!) >> > > To amplify Mark’s reply, this from the announcement: > >> This lens’ KAF4 mount is compatible with an electromagnetic diaphragm >> control system. In order to use this lens, the camera’s firmware must be >> upgraded to the latest version (except for the PENTAX K-70). Cameras >> compatible with this system are: K-1, K-3 II, K-S2 and K-S1. If this lens is >> mounted on a camera without proper firmware upgrade, its diaphragm control >> mechanism becomes inactive, making it impossible to obtain correct exposure. > > > stan > —
But I must say I am confused. It is named "DA 55-300…” DA = APS-C. Right? The note above about diaphragm control compatibility with the K-1 among others could refer to using it on a K-1 in crop mode. But the Table of Features under Format shows APS-C and DX. I will be interested to see if this is effectively a D FA lens rather than DA. stan -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
