Re: Cineframe 30/Cineframe 25 resolution loss vs. 60i

[Barry Green] "Well, no, there still will be a little bit of a mismatch, but not nearly as much as on a DVX or XL2 where you're mixing progressive with interlaced. On the FX1 it appears that you're getting a raw field's worth of resolution, not a blended field, so you're looking at 575 lines (vs. the about 400 if you'd shot 60i and slowed that down to 50%). CF30 (and presumably CF25) are going to be a lot higher-res than doing a de-interlace in post."

Barry, then I'm completely confused. Follow me and tell me where I've gone wrong;

Your assumption has been that the CF mode in NOT taking advantage of two fields in any way, but is just a single field, correct? If so, it would have a potential vertical resolution of 540 true lines (not 575). If you shoot 60i, then separate into fields, lift the second field up one scan line and play out the sequence as individual frames then you have a slow-mo stream of images 1/60th sec apart with 540 true vertical scan lines each (not 400).

If you're measuring greater than 540 lines of resolution in a CF mode, then the CF mode HAS to be taking advantage of extra info from the second field. If that's the case, then WHY would it only add up to 575 lines? Now of course this is all "potential resolution", and measured results would be less, but if CF limits vertical resolution to 1 field how do you get a number greater than one field?

Regards,

Jim Arthurs