Both being CMOS, the rolling shutter will affect bother cameras fairly equally. The difference in sensor size is also reasonably negligible according to the Creative Cow podcasts and a few articles- it doesn’t work anything like 35mm film, apparently that’s actually a bit of a selling gimmick, and I’ve read it’s not quite true. The reason for this is that 35mm film recorded the film frames onto the entirety of the film stock (ie the entire 35mm piece of film is exposed), but a 35mm sensor works differently and only a portion of the sensor is actually used. Crop factor is a consideration, and the 5D MK2’s sensor being bigger has inherent advantages, such as better low light capabilities and shallow depth of field, but I dont think its accurate to compare it to 35mm film, because it’s still only 1920×1080 and thats how much of the sensor is being used regardless.
Also an f1.8 50mm prime is a great lens for shallow depth of field without making the image too grainy. I personally think the 1.4 is a little overkill- in DSLR terms, 1.4 means the nose of a subject can be in focus and their eyes aren’t, so unless you want depth of field that shallow for some reason, its probably worth saving the money.
😀
Tom Morter-Laing
Freelance Editor
Certified Apple Product Proffessional, 2010
http://www.depictproductions.co.uk
Sony Z5, with Rode NTG2.
iMac 27″ intel i7 2.93GHz, 12GB RAM, ATI HD5750 [1GB GDDR5], 2TB Int. SATA with 2TB External HDD; (FW800), with Elgato Turbo H264HD.