Super Telephoto w/ Metabones Speed Booster XL 0.64x Adapter

Started 8 months ago | Discussions thread
buggz Regular Member • Posts: 187
Re: Super Telephoto w/ Metabones Speed Booster XL 0.64x Adapter

I thought it is 600x2=1200x0.64=768mm ?

Nope.    Looks like 491.52mm

http://www.metabones.com/article/of/Metabones_Speed_Booster_XL_0.64x_5Jun15

http://www.metabones.com/products/details/MB_SPEF-m43-BT3

"The new Speed Booster XL 0.64x reduces the full-frame crop factor of the Panasonic GH4 from 2.0x to 1.28x, thus effectively transforming these cameras into APS-H format. When the GH4 is used in Cinema 4k video mode the horizontal full frame crop factor is reduced from 2.34x to 1.50x, thus effectively transforming the GH4 into a super-35 format 4k cine camera. In addition, the speed of any attached lens is increased by 11/3 stops, with a maximum output aperture of f/0.80 when an f/1.2 lens is used. For example, a 50mm f/1.2 becomes a 32mm f/0.80, which is the fastest aperture available for full size Micro Four Thirds format."

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