Tag Archives: GH4 4K Video

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One of the concerns with shooting on micro four thirds is with it's cropped view. In addition, shooting at 4K on the GH4 camera will further crop your view. If you follow the blog, you would have seen me testing some de-fishing techniques using a Rokinon 7.5mm Fisheye Lens. Though not perfect, i've been able to use this for some smaller projects with acceptable results. Check out the video below for examples.


[Tip: When using this technique with a person, keep a distance and place them in center frame whenever possible. Side distortion is not always flattering..]

Though not a perfect solution, this sub $300 dollar lens defished is still capable of capturing a wider field of view than the $1K 7-14mm F/4 Lumix. Of course with the defish technique your project will look it's best at a final output of 1080p. Here are a few screengrabs showing how much view is lost during the defish process.

fisheye
Original Fisheye View - GH4 7.5mm MFT Fisheye

defish
4K Defished to 1080p - GH4 7.5mm MFT Fisheye

fisheye-master
Original Fisheye View - GH4 7.5mm MFT Fisheye

defish-master
4K Defished to 1080p - GH4 7.5mm MFT Fisheye

The small form factor and light weight also make it easy to carry and perfect for small stabilizers. So if you're shooting with a GH4 and have to work with interior or tight spaces, defishing from a 4K file is an interesting option to be aware of. Definitely a lens GH4 shooters should have in their bag, and available for just under $300 (click here).

Rokinon Fisheye MFT Micro four thirds fish eye lens cheesycam GH4 defish lens
find-price-button Rokinon 7.5mm Fisheye Lens for MFT Cameras

Panasonic GH4 order stock inventory
find-price-button Panasonic Lumix DMC-GH4 MFT 4K Camera

Here's another example of a video shot with the GH4 and the Rokinon Fisheye Lens (de-fished).

FCPX has it's own fisheye plugin, but may not work very well for some corrections. You can also check out the FCPEffects Plugin to remove the Fisheye Look (found here).

Fisheye-Removal-Plugin_mediumfisheye plugin video
find-price-button FCPX Fisheye Removal Plugin

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My recent video with a fisheye lens has brought up the question about how to block incoming light on a bright day. On a typical lens you would screw an ND Filter to the front. Due to the design of many fisheye and wide angle lenses, they are unable to accept threaded filters.

rokinon Fisheye Lens

On a bright day, you end up stopping down your aperture as much as possible, and sometimes that's still not enough. Simply holding a glass ND filter over the front of your lens can help, but you'll be prone to internal reflections bouncing off the fisheye back to your filter.

So if you run into this problem, here's a simple and yet very effective way to add an ND filter to your fisheye or super wide angle lens using inexpensive gels.

If you want to maintain sharpness, get a decent filter. The Rosco gels are great quality, inexpensive, and as you can see there's not too much loss in sharpness in my tests. Keep in mind i'm using a flat Cine profile on the GH4 with no sharpening added in post. You can punch this image up even more if you think you have the need.

For such a small piece I suggest grabbing the Cinegel Creative Kit (found here) which includes a bunch of different ND filters and creative colored gels.

Rosco Cinegel Creative Kit ND Filters
find-price-button Rosco Cinegel Swatch Creative Kit

If you need a larger piece, those too can be purchased in larger individual sheets (found here)

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find-price-button Rosco Cinegel ND Filter Sheets

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