Originally Posted by tbird8450
With the 500Ms, an ISFccc Contrast of 36 seems to consistently be the maximum setting for non-clipping. That should provide in the area of 50ftL+.
Yep, and that's what I'm using for ISF day. I also want something a little dimmer than 50 ftl for pitch black night time viewing...40 ftl seems reasonable. Turbe has convinced me that I'll just need to break out the meter. Sogh.
And Pure and ISFccc are not "built" the same. While you may be able to get them to measure identically, the same measurements will produce different results due to how they are coded. If you get the gamma settings just right, the ISF modes erradicate all other modes in terms of natural depth and dimension, IMO. Pure, et al simply can't match their visual quality no matter what you do.
It's certainly clear that they aren't built the same, I'm just wondering what the difference is. The difference isn't appearing in our particular measurements but surely it is measurable. Pure measures prefectly but after seeing ISF, clearly Pure ISN'T perfect.
I wonder if it's that "third dimension" of color that always so confusing to me. Maybe I'll reread one of those Tom Huffman articles and give myself a headache.