majoraxis

Here's a youtube video comparing the AF of the Samsung NX1with the 45 f1.8 prime as again the GH4 with the 12-35.... both at 2.8 - the DOF is shallower on the NX1 because of the crop factor. Looks like the AF on the 45 is pretty good - it did not expect it to perform as well. Looking forward to more comparisons, but this looks pretty hopeful to me regarding how this particular prime as it performs with AF.

I'm very interested in the AF performance of the 30 F2.0 for video Samsung prime lenses. From the videos I have watched, the Samsung zoom lens with Ultra-Precise Stepping Motor (UPSM) seem to provide the best tracking AF performance. It's claimed that UPSM improves upon the conventional Stepping Motor (SM), offering three times the precision in its ability to focus on subjects... I hope someone will do a test that covers the AF performance in video for at least a zoom and a prime for the Samsung lenses.

Between the GH4 and NX1 - I will be purchasing the NX1 with the 16-50S f2.0-f2.8 over the GH4 with 12-35 f2.8 for the following reasons: 1. Autofocus with the 16-50 2.0-2.8 seems to work pretty well (in good light). 2. Image stabilization on the Samsung does not seem to cause jitter. 3. Colors are great with not that much grading required. It looks like it can be graded if desired. 4. Depth of field or lack there of. 16mm at f2.0 for the NX1 is about 24.6mm f3.0in FF. The GH4 in 4k mode at 12mm f2.8 is 26.4mm at f6.16. 5. Shows less noise and the image does not lose its punch at higher ISOs. 6. Slow motion can go slower 120 fps and is said to be as good as 96 fps on the GH4. 7. Photo mode is 28.2 Megapixel vs 16.05 Megapixel - 43% greater resolution or dare I say full frame DSLR resolution. That said if I was shooting video with very bright/high contrast scenes and I had fast manual glass with an ND (and did not need auto focus or image stabilization) I would pick the GH4 as it seems to have a bit more dynamic range at the lowest ISOs and with up and coming log profile it will most likely be able retain more of that dynamic range. If your not going with fast manual glass - the NX1 with the 16-50S is the way to go IMHO.

I am hoping that A is RAW and B is the video because I like the look and feel of B better. That said I am expecting B to be RAW for the reasons people mentioned - better color gradation, purer white balance, etc... Anyways - looking forward to reading the results as well as the workflow overview.