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“Bottle” movie – GH4 or A7S?
I think I have stated this before – I teach filmmaking at the high school level. I have a student who graduated two years ago, and instead of going to film school decided to strike out on his own (I won’t comment one way or the other on that issue). He’s an excellent cinematographer, an OK director and editor. Fortunately, he’s paired up with someone who can write, and they have a “bottle movie” they’d like to shoot – 2 characters in a room (living room of an abandoned apartment, two characters in chairs, for about 75 minutes – four scenes in the bathroom, otherwise just the two of them talking. I read the script, it’s more engaging than it sounds). He has come to me for equipment advice, and so that’s where I turn to you all (he is being privately funded by his parents for this little project – suffice to say a decently well-off family, but they’ve privately stated to me they won’t spend a penny more than necessary)
Anyway – pretty standard sized living room (16 x 20 is what they measured). They plan on using 8 point lighting, and their shooting strategy is such – they want to use the same method that Lumet used in 12 Angry Men – start of with short focal lengths and upper perspectives, and as the movie goes on, increase focal length and bring perspective down -shrink the room as the movie goes on, in other words. There will be no handheld work, no dollies (only a gear-based slider) – so basically all tripod.
He cannot decide on a couple of things. He knows he wants to shoot in 4K to an external recorder with monitor. He cannot decide between the GH4 and the A7S. Reasons for indecision: MFT vs Full Frame, the latter allowing for exact focal lengths, no calculation, etc. He also likes the idea of Slog2 and its color grading possibilities. Finally, he cannot decide on prime lenses vs zoom lenses. I’ve told him that a prime will be a sharper image in ether case, though the zoom will offer greater flexibility / choices in terms of his shooting strategy and a slightly softer image. And so for the purposes of this microbudget film (he already has a good computer that can handle 4K in post), considering setting – is the full frame & Slog of the A7s worth the $1,000 over the GH4? I apologize in advance if this question starts any heated arguments of one vs the other. I’ve done a lot of reading by “experts” (who often are schills in disguise it seems), and having had no hands-on experience with either camera (I still work on a 5D Mark II), I turn to you. I’d recommend he rent each one for a weekend with a kit and see which he likes better, but the closest rental house is four hours away.

