Probably everyone else already knows this trick, but in case you don’t: You can tell Lightroom that whenever you import photos, if it recognizes the lens, to just go ahead and apply the default lens correction.
Go into Develop mode; in the left side panel there are Presets, and at the bottom of that there are User Presets.
Find “New Preset” in the menus, and uncheck everything except for the default lens correction. Give it a name and save it.
Next time you go into Import, there’s an “Apply During Import” thingie in the right panel; put your new lens-corrector preset in there.
It escapes me why Lightroom doesn’t just do this automatically; I have never seen a picture which is not improved by the default lens correction.
Note that if Lightroom doesn’t recognize the lens, which it irritatingly doesn’t for my lovely Sigma 30mm f1.4, this does’t work. Does anyone know a trick for linking the EXIF combination of 30mm and “Sigma Lens” to a particular known-to-Lightroom profile?
Comment feed for ongoing:
From: Karsten (Oct 15 2012, at 11:27)
Unfortunately, LR 4.2 also doesn't automatically detect my Tamron 28-75mm f/2.8 until I manually pick "Tamron" in the "Make" field.
From: João (Oct 16 2012, at 01:56)
Same here with the Tamron 18-55 f/2.8.
I have to pick the "Make" and then it picks the model.
From: Martin (Oct 18 2012, at 00:30)
You can use the Adobe Lens Profile Creator Tool. See http://blogs.adobe.com/jkost/2011/06/the-adobe-lens-profile-creator-tool.html