« on: November 26, 2012, 05:48:51 PM »
Is there a need for ND filters if you bracket your exposures and use photoshop to blend in the correct exposures? I took a course at Maine Multimedia this summer and my instructor said she quit using ND graduated filters and used photoshop with multiple exposures.Good question. I have been experimenting with a 58mm Hoya graduated ND4 filter for my 50mm f/1.4 and have found that it plays havoc with the focus mechanism - of my old 50D and now my 5Dmk3. Focus is slow (partly a property of this lens) and I suspect due to using Evaluative TTL - although Center-weighted average doesn't make it noticeably better.
I have conducted some test shots recently to see if there's a better way - and like your experience, have found that I can get as-good or better using photoshop, provided I prepare a little more and do some Exposure bracketing.
What I see as the advantage of using post, is that you can make the exposure look anyway you like - whereas once you have shot it with an Grad-ND filter - there's no way back.
The IQ on the 5D3 is so much better than my old 50D, that I'm quite happy to do it in software now.