joergengeerds wrote:2. massive WB shift (>2000K and 50 magenta tint) is necessary to get the image to look more normal,
Wait, add 50 magenta tint after taking out the IR filter in front of the sensor?
That doesn’t sound right – you’d need to take out the magenta, and still be nowhere near the normative color scale, after the consequently immense IR contamination following the removal of the IR filter.
joergengeerds wrote:never the less, the entaniya has an IR cut filter as the last element, and I even doubled it up. but on average, IR cut filters have a strait transmission for the visible spectrum, but the BMD IR filter is very very green
Do you mean the way the actual filter coating looks green (which it’s supposed to) or the green that it imparts the footage? If you mean the latter, then it’s quite the contrary – BMD IR filtration tends to transmit significant near-IR wavelengths, and the resulting red–magenta needs to be balanced in post.
I’m guessing the 50 magenta tint you needed to add was because, as you say, the Entaniya lens you’re using has IR-cut filter as the last element, which you also doubled up.
Did you evaluate the IR filtration of the lens’s last element before doubling it up? If it’s sufficient, then you may not need to use an extra IR filter, thereby eliminating the need to add the extra magenta tint.
However, even if you could mitigate the color issues, it’s likely you’ll still have difficulties with the hyperfocal distance without the sensor’s IR-cut filter.