Andronico, I am still not quite following this test. First of all the Sekonic light meter shows 48f/s, which I assume is the same as "48 frames per second." You had stated in the heading "24p." I would assume that as you crank up the camera, exposure times will shorten and unless you can open up the iris more, you will get darker images.

With respect to the stated ISO rating, I understand the SI-2K has sensitivity more like 200 ISO/ASA film has, and not the factory stated 400? That is pretty low indeed, considering 500 ASA color negative stock options w. film cameras. With 9-12dB gain, the image is still way too dark, of course you did not have much light in the room to start with. Anyhow, when the light mater states you need F0.5, you do need to add lighting, unless you have a T0.5 lens laying about.

Lastly, which model Sekonic is that? I love its back-light LCD screen! Is it also a spot meter?

Again, the way I read the Sekonic light meter's reading, if you are shooting at 48 frames per second (instead of 24 fps), you would have needed to open up your lens' iris to an F stop of 0.5. Is this correct?

Now, sicne F-stop or T-stop 0.5 lenses are in rather short supply, the way to "correct" this situation would be to (A) throw more light onto the scene or (B) dial up the gain. Personally, I always think that option A is the preferred way to go.

I was surprised to learn that in your in-depth tests, you had found that instead of the mfr's stated 400 ASA nominal rating of the SI-2K's CMOS sensor, it is actually half that at only 200 ASA. That is indeed quite a large difference in sensor sensitivity, something that the mfr should have stated in their specs. Unless you like dialing up the gain level and risk adding digital granularity noise, you would have to light each secene as if you were shooting with 200 ASA film stock, which is pretty low, considering that we used 500 ASA Fujifilm stock some 17 years ago already to great end results. No grain, no noise, and precious little light source needed.

I was wondering, what particular model Sekonic meter is the one depicted in your test, and do you recommend it? (I am looking for a new one to replace the old model.) I love its backlit screen, so soothing. Also, does it do spot metering (1 degree or 3 degree angle) as well? Also which model director's viewfinder do you use? Thanks for everything, Andronico!

ok guys hold up... let me explain what is going on here. The SI-2K shoots 24p at 1/48 fps because that is how it deals with the smear people have experienced with CMOS chip camera. As for the ISO I have found it is around 320 not 200. I would say it could pass for 400 outside. And all of this is with no gain. I meter it at 320 for interior lighting. The meter is the L-558R. As for the text in the video the 24p @ 180 is talking about the shutter angle. 180 degrees not 180 fps. And the aperture is at 1.9 but i was showing that even under at a proper aperture of 0.5 that you could get an interesting looking image. Does that help?