Can you help with focal length/lens on BMMSC?

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Alex Pirey

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  • Joined: Sun Oct 29, 2017 4:22 pm

Can you help with focal length/lens on BMMSC?

PostThu Mar 01, 2018 9:59 am

We have Blackmagic Micro Studio Camera 4K and our friends gave lens + speedboosters for tests:
1. Nikon G to BMPCC Speed Booster 0.58x
2. Nikon DX 18-35 f/1.8
All work well
If we calculate via Metabones's formula:

18*1,75 = 31.5mm is minimal focal lenght for this lens. I'm not sure cuz this formula for FF but lens is crop (DX)

We need smthing 12mm-20mm with <= f/1.8. What can you offer from lenses?
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Howard Roll

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Re: Can you help with focal length/lens on BMMSC?

PostThu Mar 01, 2018 7:00 pm

Aaaaaaaahhhh. You're melting my brain. :D

You're using a speed booster, on a S16 sensor, with an APS-C lens, and you want to talk in FF/135 equivalents.

So when you say you need something 12-20mm is that FF/135, APS-C, S16, with or without speed booster.
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Denny Smith

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Re: Can you help with focal length/lens on BMMSC?

PostThu Mar 01, 2018 8:57 pm

Forget trying to compare a S16 camera to a FF135 Camera, two different beasts!

Instead, embrace the S16 format. A normal angle of view (AOV) lens focal length for the Micro Studio is around 18mm, so without the Speed Booster, the Nikon Zoom is going to give you a nice normal to short tele lens AOV.

With the Speed Booster (18 x 0.58) the 18mm side becomes about a 10.5mm lens, while the 35mm is now a 20, short tele. A 29mm lens is the S16 equivalent of a 135mm 85 portrait lens AOV of about 27-degrees. A 50mm on the SB would be a better Head and should shot as the perspective is more natural looking than the slightly wide 35mm.

That said, using APS/C or FF lenses on a SB alters the lens perspective, so if you need a real portrait lens perspective, a MFT Native 42.5 or 45mm lens is better. But the lens choice you make all depends on what you are shooting and the look you want.
Cheers
Denny Smith
SHA Productions

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