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Canon 24-70mm f/4L highest Aperture with Speedbooster on GH4??

Started Mar 17, 2015 | Questions thread
ijm5012 Senior Member • Posts: 1,889
Re: Canon 24-70mm f/4L highest Aperture with Speedbooster on GH4??

jennajenna wrote:

ijm5012 wrote:

DevilMind wrote:

Canon 24-70mm f/4L highest Aperture with Speedbooster on GH4??

i know speedbooster increased 1 step on IRIS but what will f/4L become on GH4 after speedbooster? f/3.5 or f/2.8???

can anyone confirm this who has same lens on speedbooster on m43 camera?

You've answered your own question. The speed booster gives you a 1 stop improvement in aperture, as well as reducing the focal length by .71x. So a 24-70 f/4L when mounted on a SB on your GH4 behaves like a 17-50 f/2.8.

actually fov will be 34-100 with fake 2.8...fake in that aperture will appear like a 5.6 bokeh wise but 2.8 in light entry

The numbers I listed are relevant to m43, not FF equivalent (since he's mounting this on a m43 camera). The lens will behave like a native m43 lens that is 17-50mm with a constant aperture of f/2.8.

I'm not sure what you mean when you say bokeh, but I believe you mean DoF? In that case, then yes DoF will be roughly equivalent to f/5.6 on a 35mm camera.

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