Thanks for trying to convert the image.
I took other pictures this afternoon.
I tried to set up the white balance in my a700 with the R72 filter on, and the WB value becomes 6600K G9 ? Is this normal ? In all case, I was still able to process the image in photoshop normally.
I also tried to use longer exposure (around 1 minute), and still no differences: I cannot get any colors in post processing :
Here is the histogram of the RAW file before processing :
Is it the expected histogram ?
What should the histogram look like for a photo that can be converted successfully in color (blue/white) ?
I still need to try at noon, to see if the IR is stronger. But, I start to wonder if my Hoya R72 filter is a "real" one....
Did anyone else experienced the same problem ?
By the way, is there any setting on the A700 that could cause the problem ? I have dynamic range set to normal, but again, if I shoot RAW, it should have no effect according to me...
Thanks again for the feedback,