Heh! :-)  Inconvenient to do f:2.8 with flashes, but I can use the
lens as long as I keep it between 35mm and 50mm. In a pinch I could
use my 18-55 too. It would be up around f:8-11, and it's reasonably
sharp there.

I have to admit I'm questioning my informal policy of only owning one
set of glass. Backups are a good plan in just about all aspects of
life.


On Sat, Jun 14, 2014 at 6:42 PM, Zos Xavius <[email protected]> wrote:
> Just shoot everything wide open. Embrace the softness. ;)
>
> On Sat, Jun 14, 2014 at 6:41 PM, Zos Xavius <[email protected]> wrote:
>> Yeah, sorry about your troubles Bruce. I don't really understand how
>> the camera electrically controls aperture with A lenses onwards, but
>> triggering the aperture itself is still all mechanical. I had a
>> feeling that it might be something bad in the movement of the lever.
>> If you are getting correct EXIF information (focal length, selected
>> aperture, etc), then the lens is probably communicating with the
>> camera ok. I try to keep a cheap AF 28-80 around as a beater/emergency
>> lens. My current FA28-80 is pretty banged up and needs replaced with
>> something slightly more robust. Hope you have something that will work
>> out for your shoot.
>>
>> On Sat, Jun 14, 2014 at 6:09 PM, Bruce Walker <[email protected]> wrote:
>>> No and no. The EXIF records what should have happened, not what I get.
>>> Zooming apparently mechanically sticks the aperture wide open.
>>>
>>>
>>> On Sat, Jun 14, 2014 at 6:04 PM, Attila Boros <[email protected]> wrote:
>>>> Sorry to read that. Can you stop it down in DOF preview? Is the
>>>> aperture recorded in EXIF data correct?
>>>>
>>>> On Sat, Jun 14, 2014 at 11:08 PM, Bruce Walker <[email protected]> 
>>>> wrote:
>>>>> I think I know the answer to this, but what the hell.
>>>>>
>>>>> I'm testing a lighting setup today. K-3 on M, remote triggered flashes
>>>>> for light. Settings are around 1/125th, ISO 200, f:11.
>>>>>
>>>>> So I zoom in on my test object, ~35mm, shoot, exposure is perfect. I
>>>>> pull the zoom out, 16mm, shoot, exposure is _wildly_ off. Lightroom
>>>>> suggests at least 4-5 stops overexposed, but it's madly clipped. WTF?
>>>>> This is repeatable. But every once in a while, like after
>>>>> power-cycling K-3, the exposure is right.
>>>>>
>>>>> Long story short: cleaned the contacts of both K-3 and 16-50, nothing.
>>>>> Swapped an 18-55 in and bingo! 100% perfect exposure at all zooms.
>>>>>
>>>>> So it looks like the DA* 16-50 is failing to stop down for the shutter
>>>>> under some circumstances, like very wide zoom. Has anyone else
>>>>> experienced this? Is it something that one can fix, eg by giving it a
>>>>> good smack? :-)
>>>>>
>>>>> Thanks!
>>>>>
>>>>> --
>>>>> -bmw
>>>>>
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>>>
>>>
>>> --
>>> -bmw
>>>
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-- 
-bmw

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