muf

I'm happy with my colour reproduction too. But that is because I like an unusual look and don't mind if things don't look exactly true to "eye vision". But I also only modified an inexpensive 600D, I would never do that with a 5D unless I was made of money. Other people might not be so adventurous (given the marginal gains to be had), hence my warning.

As an experienced IR shooter (I own a [url=http://www.flickr.com/photos/66126370@N07/]600D with the hot mirror removed[/url]), I cannot recommend removing the hot mirror for anyone who wants to retain decent colour reproduction on their 5D III. The Canon hot mirror (which is also the optical low pass filter and houses the piezoelectric sensor cleaner) is vastly superior (in that it blocks almost all IR) to any third party hot mirrors like the one from Tiffen. Replacing the hot mirror with a third party filter will almost certainly bring a pink tinge to your shots and especially black clothes will not be the same (they will show up dark purple) because black fabric is usually bright white when viewed in the infrared spectrum and as such will show IR contamination the strongest. I also have reason to believe the EOS high end range uses a more effective hot mirror than the lower end, as I have a bright IR LED light that can light up an entire room (I use it for night vision with my modified 600D), and when viewing it directly with an unmodified 450D there is IR leakage (you can see a dark pink light) and viewing it directly with an unmodified 5D II it's completely black (as you see it with the naked eye -- we don't see IR) suggesting a more effective hot mirror. You can easily test IR sensitivity by pointing a TV remote at your camera and pressing a button. I'll be interested in seeing results from people before/after modification. I've only ever known about people removing the hot mirror for astrophotography and IR/UV shooting, removing it for an extremely marginal improvement on sharpness seems a waste of a perfectly good hot mirror that also doubles up as a sensor cleaner.