I've never heard of that, and none of the F series lenses I own,
admittedly a relatively small subset works like that.
On 12/19/2017 3:38 PM, Daniel J. Matyola wrote:
I believe that, on some of the older lenses, like the "F" series, the
aperture ring had to be set in the "A" position in order
In any case, the camera refusing to seek focus is an intermittent
occurrence. It might have to do with heavy backlight, or something else.
Anthony Farr wrote:
The electrical contacts between lenses and bodies are usually kept
clean by the mounting and dismounting process. Each time you turn a
Daniel J. Matyola wrote:
>I believe that, on some of the older lenses, like the "F" series, the
>aperture ring had to be set in the "A" position in order for the camera to
>be able to autofocus the lens.
Nope. F series lenses will autofocus with the aperture ring off the
'A' position.
--
Mark
I believe that, on some of the older lenses, like the "F" series, the
aperture ring had to be set in the "A" position in order for the camera to
be able to autofocus the lens.
Dan Matyola
http://www.pentaxphotogallery.com/danieljmatyola
On Tue, Dec 19, 2017 at 3:32 PM, mike wilson
wrote:
> Why
Why would manual aperture setting affect the ability to autofocus?
> On 19 December 2017 at 13:23 "Daniel J. Matyola" wrote:
>
>
> You guys are all snarter than me.
>
> A while back, I had an older lens on my K-5 IIs that refused to focus. I
> struggled with it quite a while before it dawned
You guys are all snarter than me.
A while back, I had an older lens on my K-5 IIs that refused to focus. I
struggled with it quite a while before it dawned on me that I had neglected
to place the aperture setting on "A"
D'uh!
Dan Matyola
http://www.pentaxphotogallery.com/danieljmatyola
--
PDM
The electrical contacts between lenses and bodies are usually kept
clean by the mounting and dismounting process. Each time you turn a
lens towards the lock position, or away from it, it wipes clean the
contacts by a very small amount. So, a seldomly mounted or changed
lens only gets cleaned seldom
Anthony Farr wrote:
First you need to isolate the fault to either the lens or the camera
body. You have other camera bodies so start by determining if the
Bigma behaves or misbehaves on those.
regards, Anthony
I've had similar problems with the lens on other bodies. I don't tend to
use other
On 12/18/2017 01:49, Larry Colen wrote:
This afternoon I was photographing a heron at the Waldport seawall with my K-1
and sigma 50-500 during low tide. It had flown from one spot to another, I was
walking back to the new spot, photographing as I went, and at one point the
camera went complet
On Mon, Dec 18, 2017 at 3:16 AM, Anthony Farr wrote:
> First you need to isolate the fault to either the lens or the camera
> body. You have other camera bodies so start by determining if the
> Bigma behaves or misbehaves on those.
> regards, Anthony
Similar problem this past summer with my D200
Larry, I'd try cleaning the contacts on the lens. "Spit & Polish".
Alan C
-Original Message-
From: Larry Colen
Sent: 18 December, 2017 8:49 AM
To: Pentax-Discuss Mail List
Subject: refusal to even attempt to focus
This afternoon I was photographing a heron at t
First you need to isolate the fault to either the lens or the camera
body. You have other camera bodies so start by determining if the
Bigma behaves or misbehaves on those.
regards, Anthony
On 18 December 2017 at 17:49, Larry Colen wrote:
> This afternoon I was photographing a heron at the Waldp
This afternoon I was photographing a heron at the Waldport seawall with
my K-1 and sigma 50-500 during low tide. It had flown from one spot to
another, I was walking back to the new spot, photographing as I went,
and at one point the camera went completely out of focus, then wouldn't
even atte
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