Hoi Jos
I would be willing to help offline with the Camera Raw dll. I will need the
lens ID for each and some other info like the lens name. You might get lucky
and the lens profile exists in LR already, even if LR/Camera Raw don't
recognize the lens. That was/is the situation with my Sigma 18-250 HSM, even
after Adobe twice said they added the lens in updates.
We can even do it in Dutch if you prefer :-)

Gerrit 

-----Original Message-----
From: PDML [mailto:[email protected]] On Behalf Of Jos from Holland
Sent: Friday, June 7, 2013 8:55 AM
To: Pentax-Discuss Mail List
Subject: Re: Pentax K5 does not recognize Sigma 8-16 lens

Thanks Gerrit,
I did not check with exif tool.
I could also check with the Pentax Camera utility that came with the K5 If I
can add a lens in LR, can I also correct some lens names? I have some lenses
called "Sigma or Tamron  lens" in LR.

greetz Jos

On 7-6-2013 13:28, Gerrit Visser wrote:
> Have you checked with something such as Exif tool? If the info shows 
> there and not LR, then you might have to use a hex editor to modify 
> cameraraw.dll to 'add' the lens. I had to do that for my Sigma 18-250 
> HSM lens. Also had to add a lens profile to Camera Raw.
>
> Gerrit
>
> -----Original Message-----
> From: PDML [mailto:[email protected]] On Behalf Of Jos from 
> Holland
> Sent: Friday, June 7, 2013 6:39 AM
> To: Pentax-Discuss Mail List
> Subject: Pentax K5 does not recognize Sigma 8-16 lens
>
> Dear group,
> I aquired the Sigma 8-16mm lens for use on my K5.
> I noticed that the camera does not show any lens name in the metadata 
> info in Lightroom (version 4.4) and the focal length is only mentioned 
> down to 10 mm, 9 and 8 is blank.
> Camera SW version is 1.14, (the latest) Is this a camera problem or a 
> Lightroom problem?
>
> Greetz, Jos
>
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