On 6/14/2016 9:55 AM, Stanley Halpin 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
So, what's the latest firmware for K-1?
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