Comments on: ND filters http://blog1.dhstewart.com/2010/01/nd-filters/ Fri, 06 Jan 2012 12:08:14 +0000 hourly 1 http://wordpress.org/?v=3.1.1 By: admin http://blog1.dhstewart.com/2010/01/nd-filters/comment-page-1/#comment-502 admin Wed, 31 Mar 2010 18:17:40 +0000 http://blog1.dhstewart.com/?p=297#comment-502 Thank you for your kind words. Yes the IR is an additional problem, one that I have seen show up after 6 ND. The tests I did that were showing color shift were done on a color meter and the shift was actually the other way, towards green. A better way to do the test would have been directly onto a CMOS sensor. This was done very well by <a href="http://hurlbutvisuals.com/blog/" rel="nofollow">Shane Hurlbut, ASC</a> and posted on his blog. I highly recommend reading Shane, super knowledgeable and a really nice guy. Good luck and thanks again for taking the time to write in. Please send your resume to david@dhstewart.com. I was just in Miami 2 weeks ago for an ad job and could have used you. Thank you for your kind words. Yes the IR is an additional problem, one that I have seen show up after 6 ND. The tests I did that were showing color shift were done on a color meter and the shift was actually the other way, towards green. A better way to do the test would have been directly onto a CMOS sensor. This was done very well by Shane Hurlbut, ASC and posted on his blog. I highly recommend reading Shane, super knowledgeable and a really nice guy. Good luck and thanks again for taking the time to write in. Please send your resume to david@dhstewart.com. I was just in Miami 2 weeks ago for an ad job and could have used you.

]]> By: Adam Reign http://blog1.dhstewart.com/2010/01/nd-filters/comment-page-1/#comment-501 Adam Reign Wed, 31 Mar 2010 18:15:27 +0000 http://blog1.dhstewart.com/?p=297#comment-501 Hi David, Just by reading your blog I feel more confident as a photographer. So I only felt right sharing as well; as ND color shift issues also effected my work. What I found out was similar to the RED, the 5D needs extra IR pollution filtration when using any ND, via a "Hot Mirror" filter as the first thing the light hits. When you ND (with a filter that is only blocking visible) it increases the (relative) IR levels that your sensor is taking in. Hence the massive color shifts. Filmtools.com has an awesome (slightly expensive) line of IRND filters from Tiffen that combine the Hot Mirror and ND into one piece of white water glass. Which is the ultimate solution (at least in my opinion :) Thanks for sharing! Also anytime you need an experienced solid assistant / bts shooter (still or motion film) in Miami look no further. Would you like me to send you my resume? Best, Adam Reign Miami, FL Hi David,

Just by reading your blog I feel more confident as a photographer.

So I only felt right sharing as well; as ND color shift issues also effected my work. What I found out was similar to the RED, the 5D needs extra IR pollution filtration when using any ND, via a “Hot Mirror” filter as the first thing the light hits. When you ND (with a filter that is only blocking visible) it increases the (relative) IR levels that your sensor is taking in. Hence the massive color shifts.

Filmtools.com has an awesome (slightly expensive) line of IRND filters from Tiffen that combine the Hot Mirror and ND into one piece of white water glass. Which is the ultimate solution (at least in my opinion :)

Thanks for sharing! Also anytime you need an experienced solid assistant / bts shooter (still or motion film) in Miami look no further. Would you like me to send you my resume?

Best,

Adam Reign
Miami, FL

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