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JVC 4K cameras, including GY-LS300 - 4K for $2995, GY-HM200 and GY-HM170
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  • Looks like to shoot 4k and use M4/3 lenses, you may need to allow a little vignetting. Would be interesting to see how various M4/3 lenses fair in the 86% 4k scan mode, as it looks like any mode with more crop than that, reverts to HD. Images from video above.

    80.jpg
    800 x 450 - 45K
    86.jpg
    800 x 450 - 46K
  • SO if I use DX format lens on booster (to m4/3 obviously) what % of sensor will be covered or DX on regular adapter?

    other words I still can't figure this out how shot on full "DX size" sensor if its m4/3 mount?

  • @konjow Appears to me the LS300 supports full S35 100% crop with Nikon DX lenses. With Lumix lenses, you'd need an 80% crop to reduce the sensor to MFT size, but you'd still be able to record in 4K as well as 1080p resolutions. With narrower than 80% crop, you could shoot only in 1080p.

  • Thanks @lpowell That was my 1st thought

    So DX should cover full sensors without booster on regular adapter. hope thats somehow correct! I really like the camera so far.

  • I really want to see some more footage with this, shot with nice glass. So far its lacking a bit of magic somehow, not helped by the fact that they always seem to be shooting 30p.

  • Quoting FirstBase but I also think they clearly had the thought of stealing Panasonic's thunder in coming out with their own "AF200." It's hard not to like the on-paper specs of this cam.

    I went to NAB looking for this camera to be at the Panasonic booth. Instead it was at JVC and for about the same price I expected to pay.

    I would order it but first have a question about the 80% crop for Panasonic MFT lens. Is the top/bottom cut off or just a the center of Sensor used? Do you still get the benefit of larger Sensor for low-light shooting?

    It is not unusual for me to need 3200 ISO or higher on my A7s I sent back my HC-X1000 do to poor performance indoors where I do 95% of my shoots. I don't want to get one of these just to send it back.

  • The Japanese link above lists the crop ratios available in the LS-300 menu:


    100% - Super 35 - PL mount, 35mm still lens

    97% -  

    95% -

    92% -

    87% -

    86% -

    80% - MFT - Micro Four Thirds lens

    76% -

    72% -

    67% -

    63% -

    59% -

    54% -

    52% - Super 16 - C mount, 16mm cinema lens

    47% -

    43% - 2/3 inch - B4, B3 mount, ENG lens


    In 4K resolution, you can shoot in sizes from 100% down to 80%.

    In 1080p resolution, you can shoot in sizes from 100% down to 43%.

  • What worries me, is that if only 80 percent of the sensor is used with my MFT lens, will I only get 80% of the light? I shoot in poor/low light conditions

  • @RRRoger No, at 80% you get the full amount of light the MFT lens projects into a 16x9 frame within its image circle. What you don't get is the full APS-C sensor with its 1.5x crop factor. You instead get an MFT-sized rectangle centered within that sensor, with about a 2x crop factor. In effect, you are digitally zooming into the sensor to match its frame size to the image circle of each lens.

  • A more in-depth making-of is available as well :

  • Quote LPowell: No, at 80% you get the full amount of light the MFT lens projects into a 16x9 frame within its image circle. What you don't get is the full APS-C sensor with its 1.5x crop factor. You instead get an MFT-sized rectangle centered within that sensor, with about a 2x crop factor. In effect, you are digitally zooming into the sensor to match its frame size to the image circle of each lens.

    So, if I put a MFT lens on the JVC GY-LS300 like the Rokinon 24mm T1.5 Cine, will it let in all the light the S35 Sensor can handle because of the larger sized glass elements. For a low light situation would it better to use the Rokinon with MFT, or APS-C or FX mount and an adapter?

  • RRRoger, that will make no difference. The Rokinon lens is a lens that easily covers S35 - whether you choose the lens with a MFT-mount or Canon-mount or Nikon-mount (or whatever). It is a S35 covering lens on which you can choose the mount. No matter what mount you choose when purchasing the lens - it will always cover S35.

    There do exist "true MFT"-lenses (so-to-speak), which are likely to cover just an MFT-sensor sized area. For those lenses you need to set the VSM to MFT (80%). There will be no difference in light sensitivity (as the pixelsize can't change of a sensor).

  • camsr, you are referring to MFT lens like the Panasonic ones I use on my GH4. They have very small glass elements on the mount end. The LS300 will have to be set for 80% to use them properly and when huge DOF is preferred.

    The advantages of the Rokinon are probably why this is the only lens I have seen on LS300 CamCorders. It also explains why the LS300 on display at NAB seemed adequate in that low light environment at least through the viewfinder and LCD..

  • @RRRoger No, it makes no difference - only the maximum aperture of the lens will make a difference is how much light you need for your shot. The advantage of the Rokinon or SamYangs over true MFT lenses would be: 1) focus can be shallower due to larger sensor surface 2) S35 is a "known" sensor size for professionals - so you know which focal length results in which angle of view (the last thing is actually explained in the interview (somwhere around the 5 minute mark) :

  • On location with the JVC GY-HM200