July 27, 2016 at 5:23PM


Zoom on the MFT platform, what do you use?

MFT users, what do you use for zoom?

Do you use constant aperture parfocal lenses and if so which ones? If not how do you deal with aperture and focus issues?


When I bought my GH4 I also bought the Panasonic 12-35mm f/2.8 zoom and the Panasonic 35-100mm f/2.8 zoom, which gave me a pretty good zoom range at f/2.8.

After about 9 months I sold the 35-100mm f/2.8 lens because I could not get rid of micro-jitters in my video image when shooting handheld footage. It's too bad because it's a great lens for just about anything, but I can't have micro-jitters in any of my footage.

The 12-35mm f/2.8 had the same problem but Panasonic fixed this with a firmware upgrade, so I still shoot a fair bit of work with this lens. ( the 35-100mm also had two firmware updates but neither of them fixed the micro-jitter problem )

The only other zoom I use is a Nikon AI-S 80-200mm f/2.8 lens which is great when you need the reach.

Any other zooms I've tried have not been parfocal and I can't afford a real cine zoom lens, so for everything else I use prime lenses. ( 8 Nikon AI-S primes and a Samyang full-frame fish-eye which is a great super wide that can be de-fished if necessary )

July 27, 2016 at 7:14PM, Edited July 27, 7:14PM

Guy McLoughlin
Video Producer

Hi, I am considering buying the 35-100mm and I just wanted to ask you if you sold yours before the 2 firmware updates, or if you have first hand experience of the 2 updates not fixing the jitters? I really want to get this lens and was under the impression that the updates actually fixed the jitters.

Kieran Vyas

August 12, 2016 at 12:07PM

I too have the 12-35mm F2.8 but it does not hold focus after zooming.
Do you have the same problem of did I miss some settings?

July 30, 2016 at 6:28PM

Cary Knoop

>>>I too have the 12-35mm F2.8 but it does not hold focus after zooming.

Here are the steps I am taking with my lens, and my focus holds up fine with this zoom lens...

1- Put my GH4 in manual focus mode

2- Zoom out to the 35mm setting.

3- Set my focus using either the built-in magnification on the LCD back, or with an external monitor.

4- Zoom out to the 12mm setting, and check my focus.

My Panasonic lens holds up well even at f/2.8 when tested like this.

I haven't tried shooting some still photos, but I would expect the focus to hold up with still photos too.

July 31, 2016 at 7:23PM, Edited July 31, 7:25PM

Guy McLoughlin
Video Producer

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