View Full Version : crop factor & windowed sensor?
05-20-2007, 05:52 AM
How is the "cropfactor" when shooting windowed? Does it double?
I was thinking that since I will be scaling down to 2k anyway I might as well go for the 18-50mm Red zoom, and then just use the windowed sensor when I would otherwise have used lenses with longer focal lenghts. Does this make sense, or am I going to have issues intercutting between full 35mm and the windowed material?
Justin K Phillips
05-20-2007, 11:46 AM
Windowed vs. full frame will certainly look different, but it remains to be seen how noticeable the difference really is. I would wait and see, and even then it will be up to you to decide if it is acceptable for your purposes.
05-20-2007, 01:23 PM
um3k------- nice troll handle
05-20-2007, 02:43 PM
its for documentaries. Here there is often mixed formats.
Guess the 300mm will provide some nice magnified backgrounds aswell when shooting windowed.
David Mullen ASC
05-20-2007, 04:30 PM
You'd want to test it. If you are using an 18-50mm zoom and need a 60mm shot, let's say, and therefore go into windowed 2K mode and set the zoom at 30mm for a 60mm equivalent, it may not match the look of a 50mm shot made in non-windowed mode, which would have less depth of field than the 60mm-type shot made in windowed mode using a 30mm lens. Also, if you are in a low-light situation, you may see noise artifacts more in the windowed 2K mode versus the 4K-to-2K mode. There are benefits to downsampling, so you'd want to test to check to see what the difference is on the best-case (or worse-case) scenario, presentation or distribution-wise. In a documentary, though, you may or may not have greater ability to get away with some mild mismatching in noise and sharpness between shots.
05-20-2007, 06:40 PM
Yes, zooming out and windowing is probably not going to be a very good idea. But for shots with very different focal lenghts or if matched with a change in location, I think one could get away with it.
Anyway, with all the resolution of this camera I would expect to see a lot of close-ups that are simply cropped and reframed from wider shots in post...
Thats actually quite interesting to guess about... How the resolution and the many lense options are going to change the editing and the visual flow in cinema and television?
Someday people might yawn at a craneshot with a supertele tilt/shift lense zooming in and out between keyframes. "Oh, not again!". :blink:
One thing is for sure though, Red heads want to play.