I have a Tamron 70-300 and use Lightroom 5. When I process photos taken with any of my other lenses, and enable Lens Correction, Lightroom automatically detects the lens make and model. However, when I process photos taken with the Tamron, it doesn't. I have to select the make, and then it automatically recognises the focal length etc.
Why is this and can anything be done about it? As far as I can recall it did this in LR 4 as well.