different cameras for each 'eye'?

[Fritz M.]

I am looking at getting a scarlet ff35 once they come out. In the mean time, I'm going to be weighing the decision of getting a scarlet 2/3 to hold me over till the ff35 is released. One of the things that would make me more inclined to do so would be if I could end up using the 2/3 and the ff35 to do some 3d stuff.

Would it be as simple as running each camera at the same resolution? Or would a whole bunch of precision alignment need to be made? Or is something like that just totally impossible?

Also, is there a good FAQ regarding shooting in 3D or where's a good place to learn about some of the intricacies of how it's done right? For instance something that describes what the effects are when the two cameras move farther apart or get aimed more inwards, etc.

[PaulClements]

Probably not. If I recall the 2/3 camera has smaller photosytes in order to fit the 3K within the sensor size. That being said, it has always suprised me that Red would goto the effort of designing an extra sensor for the 2/3 rather than simply having a cropped version of what will eventually be in the ff35. So it might end up being that the specs change and the sensors photostyes are the same in the end, in which case it ought to theoretically be possible to align both sensors with the FF35 cropped. There is tonnes of precision alignments involved in 3D but there is also a margin of error that can be accomodated for in post as well. If you're serious about 3D you might even want to consider using two 2/3 scarlets with 16mm glass. The extra DoF can help. With regards to a place to start there is probably none better than Bernard Mendiburu's 3D Movie Making:Stereoscopic Digital Cinema from Script to Screen, Amazon should stock as will a whole bunch of decent book stores. It's got a lot of great theory to get your head around so you can avoid mistakes early on.

Hope this helps
Paul

[Pedro Guimaraes]

you would have a different DOF...so no.

when talking 2 camera 3D aquisition, you want everything to be as matched as possible.

When selecting lenses for example we select the best 2 from a number of lenses.....all the effort is worth it.

Shootig 3D is alot more than just sticking the cameras next to each other, as you well know. Since 3D is well over 100 years old and pre-dates moving pictures there are a number of good books written on the subject. Many in you local library.

The technology is different but the most of all those books will still apply.

Maybe I'll start a thread about "3D knowledge/reference/books" maybe the mods can make it a sticky.

[Charles Angus]

Different model cameras for the two eyes = bad results.

[PaulClements]

you would have a different DOF...so no.

Not necessarily. That would surely only happen if you used different lenses, e.g. a 25mm 2/3rd lens and a 25mm s35mm lens. If you used the exact same lens on both Scarlets and you had the same settings such as the redcode being used and you then cropped the FF35 footage to match that of the 2/3 the DoF would match.

The biggest issue is the two cameras have different sensors. In my earlier post I was referring to the S35 and the 2/3 by accident. The 2/3 has a Mysterium X sensor and the FF35 is Monstro, they have different photosytes so the pixels would not align plus they have different dynamic range and read/write rates, currently even the S35 and 2/3 have different photosyte alignment even though both are Mysterium-X.

I'd just go with two 2/3rds if I were you. Why complicate something that's already complicated!!!

Paul

[Stefan Christou]

This whole confusion over equivalent focal lengths is a real pain in the ass. But beyond that, you need both lenses to be almost identical on a microscopic level and at the exact same focal length, focus and aperture. You also need to get the convergence right for each object and have the lenses close enough together. I hope Scarlet fixed will be precise enough and have good enough internal sensors to match two cameras perfectly. (I hope.)

[Mick van Rossum, NSC]

This whole confusion over equivalent focal lengths is a real pain in the ass. But beyond that, you need both lenses to be almost identical on a microscopic level and at the exact same focal length, focus and aperture. You also need to get the convergence right for each object and have the lenses close enough together. I hope Scarlet fixed will be precise enough and have good enough internal sensors to match two cameras perfectly. (I hope.)

Almost finished my second 3d movie with 2 reds and ultra primes, and the rental house had purchased a new set of lenses which supposed to be matched, however when arrived and checked their focus marks were different. I called my old assistant in the Netherlands who had done extensive training at Zeiss, and he told me that all Ultra primes lenses get a double letter code which will tell you the marks are the same (GG, HH, LL etc.) We found out the lenses were all different and Abelcine (the dealer) was able to change them for focus marks matching lenses.