Blochi wrote on 08/19/13 at 00:00:23:
Must admit I haven't tried LR5 yet. From what I hear the advancements are in different areas this time, the actual color engine (ACR, same as in Photoshop) is probably the same as in LR4. But then again - that's just a guess.
While looking into using welding glass as cheap ND filters I came across the this tutorial for correcting the green tint from welding glass (the forum security wont let me post a hyperlink...):
www.diyphotography.net/use-welding-glass-as-10-stops-nd-filterthe interesting part here is the Adobe DNG Profile Editor which can be used to make LR profiles and the program can generate a linear/flat RAW profile. Just follow the tutorial and go to the "Tone Curve" tab and select "Linear" instead of all the white balance stuff the tutorial. Put the generated profile in (in MAC OS X)
/Users/<username>/Library/Application Support/Adobe/CameraRaw/CameraProfiles
and you can select a flat RAW from the Camera Calibration tab

In case you have a Canon 650D/T4i you can just use my profile (attached as zip).
Best,
Per