GH5 Using 4K & HDR to save bad footage

joe12south

Veteran
https://youtu.be/MwO70ex4NyA

Last weekend I took a little island vacation. I had no plans more ambitious than eating, strolling on the beach and laying by the pool. As such, I almost didn't bring my camera at all. I ended-up dropping a GH5 and the el-cheapo Lumx 25mm f1.7 in my backpack at the last minute.

As luck would have it, we learned that the next morning there would be a green sea turtle hatching on a nearby island. Oops.

Since this was literally a once in a lifetime opportunity, I decided to try to capture it even though I was ill prepared. Let us count the ways:

- It was insanely bright, and I had no ND filter.
- On the water, with no polarizing filter.
- Medium FOV lens to try to capture close-ups of uncooperative wildlife.
- No stabilization.
- Dragging along a two year old.

Given the above, I wasn't able to capture *great* footage, but by utilizing a few features of the GH5 I was able to at least capture something *good enough* to share with friends and family, and my daughter when she's older.

1. 4K: By shooting 4K, I was able to crop in as much as 200% for 1080P delivery. This really helped, as otherwise the "stars" of this video would have been tiny in almost every shot.
2. HLG: Even using ISO 200, 60º shutter angle and f22, the footage was still WAY over-exposed. Amazingly, the headroom of HLG allowed me to recover highlights on everything except for the surf.
3. IBIS: Shooting handheld. On a boat. While wrangling a toddler. Zooming in post. This would have been unthinkable without IBIS. (Amazingly, I didn't do any post-stabilization.)

Anyhow, I thought I'd share this - again not because it's very good - but because I was able to salvage anything at all. We often like to talk about cameras in ideal situations, or blast people for not better controlling their situations, but sometimes you simply have to make the best out of a bad situation. It is in these cases that camera capabilities really shine.
 
PS. Yes, I really did get hit by that wave at the end. The GH5 got sandy, got wet and got hot. Continues to work like a champ.
 
Still looks cool. Vacation is always a conflict for me, trying to capture everyone else...
 
For meaningful family events like birthdays or holidays I'm always torn between bringing my camera and making do with just my camera phone. I'm glad you had your GH5 for this special occasion. The footage looks good, considering the constraints.

Question: I've heard that with m4/3 size sensors anything above f8 will cause diffraction which results in a very soft focus image. I know that there's a setting in GH4/GH5 for "Diffraction Compensation" which I assume just adds sharpening to the image. Did you have this setting enabled?
 
For meaningful family events like birthdays or holidays I'm always torn between bringing my camera and making do with just my camera phone. I'm glad you had your GH5 for this special occasion. The footage looks good, considering the constraints.

Question: I've heard that with m4/3 size sensors anything above f8 will cause diffraction which results in a very soft focus image. I know that there's a setting in GH4/GH5 for "Diffraction Compensation" which I assume just adds sharpening to the image. Did you have this setting enabled?

I believe the "Diffraction Compensation" setting only affects in camera JPEG stills. I've never tried it.

Diffraction may begin about f8, but "very soft focus image" is a subjective assessment. Does my video look "soft", even blown-up 200% as most of it is? I don't think so. I just got back from Masai Mara and I'd hazard that most of what I shot was above f8, and when I nailed focus, it looks plenty sharp to me.
 
I believe the GH5 is adding image sharpening to compensate for any defraction issues, when yiu use native MFT lenses from Oly/Pannasonic. Put a manual lens on the camera, like a Voigtlander or SLR Magic Hyperprimes, and yiu will see some softening after f/8 to 11, depending on the lens, stopping down to f/16-22 will really show a “softer” image.
Cheers
 
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