3CCD verses CMOS for HD Video Camera Realtime Transfer

[Alwyn Adkins]

I'm considering getting another HD camcorder (my Canon HV20 is on the blink).

Onnie likes 3CCD camcorder for his realtime transfers in preference to CMOS camcorders, and I know others here also use 3 CCD.

Does anybody have any thoughts, or have comparisons, between a 3CCD and a CMOS camcorder?

[Stan Jelavic]

Hi Alwyn, from what I know most cmos camcoders use rolling shutter. That does not work well for real time transfers. You need the 3CCD and its global shutter capability.
Let me try to explain in a short sentence if I could. The rolling shutter captures the image line by line. If the dark interval shows up it will capture it and save it that way and you get the ark band over the image. With global shutter all pixels are exposed concurrently so that the dark band will be overwritten with the next image depending on the pulldown ratio. The global shutter still suffers from ghosting but that is a longer discussion.
There are new cheap module cameras with the global shutter such as RPI and ELP. iPhone camera also works very well and almost no ghosting.
Tested all these combinations and have test results if you are interersted.

[Alwyn Adkins]

Thanks Stan, that's great, I'll take your word for it. I did find a PAL HS9 on FBMP but they won't even answer a message. 🤣

[Stan Jelavic]

You can use the NTSC camcoder also but have to crank up the speed to 30 fps. See the discussion here:
https://8mmforum.film-tech.com/vbb/f...565#post104565
Then change the speed back to 18 or whatever you need in the post. Note that there will be no dropped frames to change the speed. It is just a coded number in the video medium to tell the player how many frames to run per second. This always confuses people (me included).

[Alwyn Adkins]

Thanks Stan.

You can use the NTSC camcoder also but have to crank up the speed to 30 fps.

Assuming an NTSC camcorder shooting at 60th of a sec, wouldn't the projector speed only have to be 20 (I have a three-bladed shutter in my Eumig)?

This always confuses people (me included).

Yes, bit of a head-spinner, that.

[Stan Jelavic]

Sure, that is even better.