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Panasonic LUMIX G / GF / GH / GX Series
4K and AVCHD on a Micro Four Thirds system camera with interchangeable lenses.


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Old December 17th, 2014, 12:04 PM   #16
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Re: Wide and fast for low light

Yes, there is a larger cropfactor in 4k, I currently shoot with my gh3 with a 12mm lens on a steadicam and I find that lens just wide enough, 15mm on the gh4 in 4K would not be wide enough for my use.
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Old December 17th, 2014, 02:14 PM   #17
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Re: Wide and fast for low light

Yes the crop factor in 4K is 2.3x, so a 15mm lens has roughly a 34.5mm field of view (in 35mm terms.)
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Old December 18th, 2014, 05:59 PM   #18
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Re: Wide and fast for low light

The crop factor in 4K UHD is actually 2.49x as has been spoken about often on many of the forums.

I use a 17mm f/1.8 on a stabilizer quite often and like Noa says, it's very difficult to use with it's 42mm equivalent field of view in 4K. I will often switch back to 1080-60p just to get that little bit wider. I definitely need to pick up a fast 10 or 12mm for stabilizer work so that it is much simpler to keep the subject in frame and the camera movements to a minimum.

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Old December 19th, 2014, 04:45 PM   #19
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Re: Wide and fast for low light

Well this is a bit of a disappointment. I've watched quite a few youtube vids on the GH4 and nobody pointed this out as far as I can remember. I'm guessing the 8k on the GH5 will crop even more then? :)
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Old December 19th, 2014, 05:58 PM   #20
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Re: Wide and fast for low light

It was not exactly a secret that the gh4 had a cropfactor in 4K, a 12mm is a good wide focal length in 4K though in very tight spots you will need the 7-14mm f4.0, only that's too slow for weddings unless you get the new olympus 7-14mm f2.8 but I find f2.8 still to slow for most of my work as I need least f2.0 and faster lenses to get the job done. I also need autofocus to quickly lock focus before I start shooting so then a 12mm f2.0 is the fastest and widest you can get.
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Old December 20th, 2014, 06:05 AM   #21
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Re: Wide and fast for low light

that is my EXACT feeling, Noa! just regarding the 12-35mm f/2.8 from Panasonic. I have a friend here who's been filming weddings since the 90s and keeps telling me to get that lens because it will help me a lot... and I'm sure it will, up until the reception where there is no more daylight and in some situations the ISO will stay at 3200 or higher with my 14mm f/2.5.

So f/2.8 is definitely NOT ok for that part. The 15mm f/1.7 would be a dream, and a cheaper dream than that Olympus 12mm... but, like you said, might not be wide enough in some cases...
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Old January 6th, 2015, 02:47 AM   #22
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Re: Wide and fast for low light

Great footage and promo Noa! Beautiful shots! What slider did you use in the shots? Nice and smooth!
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Old March 25th, 2015, 07:50 AM   #23
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Re: Wide and fast for low light

I don't want to make another thread so I'll just post in here since it's relevant.

I recently acquired a camera stabilizer and noticed that my Panasonic 14mm lens is not nearly wide enough to make that steadycam footage look GOOD. Therefore, my next purchase has to be a wider lens.

Because most videographers I know love to use a 14mm lens (full frame 14mm), I am considering the Rokinon 7.5mm f/3.5 fish-eye. Yes, it is a fisheye lens but apparently you can de-fisheye the footage, like this guy has:


Budget is not that high ($400 max), so if you guys think I'd be better off with something else at this sort of price, please let me know. I am concerned that f/3.5 is going to be kind of unusable for wedding receptions, but the Oly 12mm f/2.0 is not wide enough and too expensive. The new Voigtlander 10.5mm f/0.95 would be both wide enough and definitely fast enough... but I doubt I'll be able to afford it *sigh*

Thanks again.
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Old March 25th, 2015, 09:10 AM   #24
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Re: Wide and fast for low light

I don't like the rokinon 7,5mm as it's soft in comparison with my panasonic and olympus lenses, I do use it for a very select type of shots, usually gets used just once during a wedding.

Another cheap option is the Olympus 9-18mm but it' also is not a fast lens but other then that there are no more cheap and fast super wide angles lenses availabale for m4/3
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Old March 25th, 2015, 09:16 AM   #25
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Re: Wide and fast for low light

If you would be interested, I"m selling my samyang 7,5mm with m4/3 mount for about half it's newprice: 150 euro excl sendingcosts. Will be putting some more gear up for sale by the end of the week but this lens will be a part of it.
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Old March 25th, 2015, 10:14 AM   #26
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Re: Wide and fast for low light

Noa I will definitely want to buy that if you're selling it. The only problem is that I have 2 events at the end of next month, and no money until then since I just bought a steadycam. You have my email, let me know what else you are selling, I might be interested. And thank you :)

PS: your Samyang can't be worse than the full frame 14mm Samyang that a friend of mine uses on his 5D, that one is just bad at everything... color accuracy, sharpness, ugly distortion.
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