Lr 6 3 doesn't give a predefined profile for Pentax-DA 1:3.5-6.3/18-270 ED SDM? This lense is available since 2 years and in the profile list exists only 18-250, which is an older lense type. Where can I get the profile Pentax-DA 1:3.5-6.3/18-270 ED SDM?
There is no official Adobe profile for this lens. We requested this profile from Pentax since they typically supply us with profiles based on lens optics design data. Unfortunately, Pentax has yet to supply us with a profile. I will resubmit a request and inform them of mutual customer demand for the profile, but I cannot guarantee if/when we I will hear from them.
In the meantime you may be able to locate a user-generated profile using the Adobe Lens Profile Downloader. It can be downloaded from the following page.