GH2 Problems setting good white balance and exposure during interview: any tips?

Gerson

Active member
I shot two interviews today with the GH2 and the 14-140mm lens. The other camera (getting a wide shot while I was in close) was a Sony EX1.

I had the following problems and wanted to ask people here for general guidance and specific tips.

1) White balance: the white balance set feature (where you aim the camera at something white) seemed--to our eyes--to result in an overly cool image. I've noticed that before. I set the color temperature manually (using the temperature scale). However, even after doing that, there were some color issues: a person whose cheeks seemed much ruddier (redder) than they were in reality. I wasn't sure how to fix that or why that happened. I was on Standard Film Mode.

2) Matching the EX1 colors: I know this is probably tough, and largely a matter of fixing it in post, but has anyone had to match the GH2 to the EX1, and if so, what Film Mode and other settings do you use?

3) LCD brightness didn't match the exposure I was getting. I was dismayed to find that the video that looked a tiny bit underexposed on my LCD was actually very underexposed when reviewed on a computer. I've gone into the menu and set LCD Mode to the dimmest setting; is that all I can do? How do you gauge exposure if the LCD is off like that? Or am I misunderstanding something?

4) I know this is quite subjective, but how high an ISO do you use in a tough situation? This was controlled interview lighting, but to get the right frame, I had to be zoomed in to 140mm, which meant I was at f5.8. I went up to ISO 800, which was frankly still too dim, but I was afraid to go higher. Should I have? Or am I better off having stayed at ISO 800 and now ready to adjust in FCP or Color?

5) This might deserve its own thread, but as much as I like my 14-140 in other situations, it was really making my day miserable--the wrong tool for this job. What faster zooms--that can get to 150mm or higher--would you recommend? Should I buy the Kipon EOS adapter and look for Canon or Tamron lenses? In a few quick searches online, I found many options, but nothing leapt out as the perfect solution: a lens very much like the 14-140, but at f2.8. What do you use?

Thanks for reading and I look forward to getting some DVXUser wisdom...
 
i can only comment from my personal observations in regards to ruddier cheeks. in standard mode, the colour profile really saturates the reds. the first thing that i noticed when i first recorded something red. smooth and nostalgic profiles are less saturated but in saying that they produce more noise/artifacts in low light situations. saturation actually helps crush the noise/artifacts in low light.

lcd is also something you should not 100% rely on as you have found out. maybe see how the evf looks vs lcd? i always refer to histogram myself.

800is is the highest i would go, ideally i try to limit myself to 640.

yep, you were just stuck using the wrong lens for the job really. the kit lens performs very well in its ideal environment (alot of light). I have yet to try a faster zoom myself, but instead just use my longer faster primes.
 
Turn on the histogram and use that to gauge exposure, my LCD deceives me too.

Also MR Fanny, 640 is the commonly used limit on the GH1, but I had understood that the GH2 was less noisy, and so could go much higher without an issue.

I use a Tokina 80-200 f2.8 (Canon FD mount) that is great and was only $275. It's a tiny bit soft wide open, but at f4 it's golden. Also, if you can stand to get closer to the subject, there are a lot of 50mm primes out there that will do the job quite well. I even shot all of the interviews on this video with the Panasonic 20mm f1.7 - http://vimeo.com/20343716 - but if I had a GH2 I would've used ETC with that lens. In that video, most of the interviews were shot at f1.7; you can tell how sharp that lens (20mm f1.7) is.
 
i can only comment from my personal observations in regards to ruddier cheeks. in standard mode, the colour profile really saturates the reds. the first thing that i noticed when i first recorded something red. smooth and nostalgic profiles are less saturated .

Agreed, I use Smooth -2,0,0,-2 unless I run out of light, in which case I use Standard +2,+2,0,-2.

(Sorry for the double post!)
 
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