Re: The lens correction option in Lightroom 5 is for the Tamron 28-75mm lens, rather than the correct Tamron 18-270mm, even though it's correct in the Library metadata. How can I fix this?

Hi,

That seems to be a problem with the the Lens ID (happens on many Tamron lenses), to get it applied correctly each and every time you will need to create a develop preset and apply it during import. The preset (for Canon) would need to contain the following so check it after you copy the correct lens profile settings and create a new preset:

  EnableLensCorrections = true,

  LensManualDistortionAmount = 0,

  LensProfileChromaticAberrationScale = 100,

  LensProfileDigest = "A148EFF7414D8B6048E1F6F111BADAF5",

  LensProfileDistortionScale = 100,

  LensProfileEnable = 1,

  LensProfileFilename = "Canon (TAMRON 18-270mm F3.5-6.3 DiII VC B003E) - RAW.lcp",

  LensProfileName = "Adobe (TAMRON 18-270mm F/3.5-6.3 DiII VC B003E, Canon)",

  LensProfileSetup = "Custom",

  LensProfileVignettingScale = 100,

  PerspectiveHorizontal = 0,

  PerspectiveRotate = 0,

  PerspectiveScale = 100,

  PerspectiveVertical = 0,

  ProcessVersion = "6.7",