Focal length doubling

[Guy Mcloughlin]

>>>Actually, the Brevis 35mm adaptor only loses about a 1/2 stop with the flip module

Sounds like DOF adapters have improved a lot. 1/2 a stop is hardly noticeable.

…But if the ground glass image is still Full Frame 35mm Photo format ( which is the reason why you would use a DOF adapter ), then you still have to stop down 2 additional F-stops to equal the DOF of the Micro 4/3 format. ( so you have the same 4,000 watts of light versus 16,000 watts of light issue that Full Frame 35mm photo cameras like the Canon 5DMk2 face )

[Bill Oneil]

I had never heard of the Micro 4/3 lens format until the AF-100 arrived. 35mm lenses have always been a standard and I have acquired a nice collection of Nikons over the years . I also own a Canon 17-55mm 2.8 and a 50mm 1.4 for my Canon 7D.

It sounds like it’s best to just purchase some fast Micro 4/3 lenses to get the most out of the AF-100 while requiring less light.

[Guy Mcloughlin]

The 4/3 format and later the Micro 4/3 format was originally created by Olympus and Kodak almost 10 years ago.

The 35mm Still Photo format has been around since the first Leica cameras, but people need to realize that the 35mm Still Photo format is very different than the 35mm Motion Picture formats.

There aren’t many great Micro 4/3 lenses around, but the are slowly trickling in with very big deal lenses coming next year. ( the 12-35mm Panasonic Fast Zoom is the one I am watching )

Nikon AI-S manual lenses are the ones I would recommend for AF-100 / GH-2 video production, as they are cheap, have manual apertures, and smooth focusing.

The Nikon 17-55mm AF Zoom is currently one of the best lenses for the AF-100, but it requires a special Nikon G mount adapter in order to control the aperture.

And for wide angles lenses, you have to go Micro 4/3 because regular 35mm still photo lenses don’t have very short focal lengths. ( the Olympus 12mm f/2.0 and the Panasonic 7-14mm f/4.0 zoom are two top choices )

[Erik Naso]

Large sensor video cameras are still relatively new in the market place. 35mm SLR has been around for a long time and we have lots of great glass to use. Who knows what the next sensor will be. S35 seems to be the big deal now. In time I hope lens manufactures will make more specialized zooms for large sensor video cameras. That is what is missing in a big way. If I could turn my AF-100 into a ENG camera look out! Wouldn’t that be great!. I have seen the 2/3rd B4 lens mod and it looks interesting but you have to have a doubler to not vignette and the lenses are designed for 3 Chips not a single sensor. It will happen but who nows when…………

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