Hacking the Kodak Reels 8mm Film Digitizer (New Thread)

[0dan0]

Hi @0dan0 -- I have a couple observations / questions about the ISO / exposure algorithm.

v7.1 - v7.5: During capture with my 'C' unit, the highest ISO / exposure that I observed was ISO 200 / ~5970µs. I never observed an ISO of 400 during capture, even with a black image. Is that behavior consistent with your expectation / experience?

v7.6: During capture with my 'C' unit, the highest ISO / exposure that I observed was ISO 100 / ~5984µs. I never observed an ISO of 200 or 400 during capture, even with a black image. Is that behavior consistent with your expectation / experience?

I understand that you're aiming for the lowest practical ISO for the film's density, but I'm surprised that none of the thousands of feet of film that I've scanned with v7.1+ has triggered neither your highest coded ISO nor an exposure time exceeding 6000µs. If that is by design, then no worries... I just want to confirm that my unit isn't underexposing images due to a hardware malfunction or firmware bug.

The code can go to 400 in preview, but this might be bug. Use the histogram to judge the exposure.

 

[rdesros]

@0dan0 Quick update on version 7.6: I’m now getting a steady 25–27 Mbps with the stock lens. Sharpness set to -0.5. There’s still a bit of jitter at the bottom of the screen occasionally, but overall the capture quality is pretty good. This is using version A of Kodak Reel. Thx

 

[P-car]

fantastic!!

Ok, so to get 25-27 Mbps, I just set it to the lowest possible number - 15 for example - and let the also do the rest, correct?

 

[rdesros]

fantastic!!

Ok, so to get 25-27 Mbps, I just set it to the lowest possible number - 15 for example - and let the also do the rest, correct?

Yes. I forgot to mention that Qp is set to the lowest value.