A7s sample footage

Here's some A7s car footage intermixed with a C100. The A7s was used for the interior/exterior detail shots and I tried the 720/120 for slow motion (ugh never doing that again). I love the camera but damn is it ever hard to expose properly. A7s footage was shot using Kholi's pp6 profile and graded with Osiris m39-709 LUT and Film Convert 2 Pro. Had to use a Lee Little Stopper ND Filter (6 stops). A Canon 100mm 2.8 L was used for all the A7s shots.

I'm still learning how to use the camera effectively and definitely open to criticism!

 
Last edited:
strancali said:
Hey Squiq, I was looking at all footage too and not just mines. Even the Phillip Bloom one above this post, the colors are just off. I don't man, it's driving me nuts. I wanted so much to like it but I guess I'll wait for something else to pop up.
Click to expand...

There's been a few occasions over the last few weeks where I was going to throw in the towel but thanks to the group effort I've been learning how to tame the little beast. If I didn't have kids I probably would have quit on it but it has a magical quality about it which I first noticed in Den's Scotland clip, Philip Bloom's Central Park shots look great too. I've shot some nice stuff but it was mostly before I was on top of it so I'm looking forward to shooting some much nicer stuff (and making my feature).

Every new camera has teething problems. Sony could have saved us a lot of trouble and put out some LUTs and colour science development notes, but hey the 5D didn't even shoot 24p until a year after we petitioned for it.
 
I can confirm macgregor's findings that cine4 is equal to S-Log in dynamic range. I have to double check but it looks like 200 ISO cine4 is equal to 3200 ISO S-Log. Noise wise they're about the same at those ISO's. I had to tweak the gamma, contrast, and saturation in post to get them to almost match.

Isn't this a lovely shot :cheesy:
m9xTZHI.png
 
The clouds on the right look a lot worse than the ones on the left: it seems like the clip in cine4 is prone to color halos and such (reminds me of the AF100) (were those issues there before you altered the image?).
But as long as you can avoid any highlight clipping then... great finding!!
 
Samuel H said:
The clouds on the right look a lot worse than the ones on the left: it seems like the clip in cine4 is prone to color halos and such (reminds me of the AF100) (were those issues there before you altered the image?).
But as long as you can avoid any highlight clipping then... great finding!!
Click to expand...

That's S-Log on the right. I shot the S-log a bit too hot and had to pull it down more in post. I had the Tokina 24-70 on (the aperture hasn't been declicked), I was more interested in working out the ISO difference than nailing exposure at the time.

Either way you still need the same amount of ND.
 
squig said:
I can confirm macgregor's findings that cine4 is equal to S-Log in dynamic range. I have to double check but it looks like 200 ISO cine4 is equal to 3200 ISO S-Log. ]
Click to expand...

Similar dynamic range but not allocated in the same way. S-log2 gives a bit more than a stop in the highlights compared to cine 4. What's "bad" about cine 4 is that there is no roll off into pure white. You have detail... then suddenly it's clipped.
;)
 
squig said:
That's S-Log on the right. I shot the S-log a bit too hot and had to pull it down more in post. I had the Tokina 24-70 on (the aperture hasn't been declicked), I was more interested in working out the ISO difference than nailing exposure at the time.

Either way you still need the same amount of ND.
Click to expand...

ok, so that was a surprise... The one on the left has the nice rolloff and the ugly blue sky of the previous slog2 clips.

I really can't wait anymore to play with this little toy myself. Just a couple of weeks more...
 
strancali said:
Hey Squiq, I was looking at all footage too and not just mines. Even the Phillip Bloom one above this post, the colors are just off. I don't man, it's driving me nuts. I wanted so much to like it but I guess I'll wait for something else to pop up.
Click to expand...

Color modes Cinema, Pro and Movie all have pretty good color right out of the camera with good skin tones. A bit suprisingly considering the name its Cinema with the most color separation. Pro compresses the space a bit for a more filmic effect, and Movie brings that even further. Cinema has just a tiny-tiny bit of bronze tint to the skin tones, Movie has a tiny bit of pink tint to them, and Pro is in the middle. I would confidently use any of these three color modes without fear of the results.

macgregor said:
Similar dynamic range but not allocated in the same way. S-log2 gives a bit more than a stop in the highlights compared to cine 4. What's "bad" about cine 4 is that there is no roll off into pure white. You have detail... then suddenly it's clipped.
;)
Click to expand...

Have you tried underexposing Cine4 half a stop? ;)
Btw, Cine4 still has more tonal range above mid-grey compared to any Canon DSLR gamma I've seen.
 
Samuel H said:
ok, so that was a surprise... The one on the left has the nice rolloff and the ugly blue sky of the previous slog2 clips.
Click to expand...

Which is why cine4 is better (if you know how to shoot) for numptys like me who have no idea how to grade S-Log. I think it's time I watched a tutorial :Drogar-Dum(DBG): However I only spent about a minute on those shots just to confirm mac's findings and see what cine4 can do vs S-log.
 
Last edited:
macgregor said:
Similar dynamic range but not allocated in the same way. S-log2 gives a bit more than a stop in the highlights compared to cine 4. What's "bad" about cine 4 is that there is no roll off into pure white. You have detail... then suddenly it's clipped.
;)
Click to expand...

Yeah, I shot different exposures and with cine4 there was no highlight recovery option like there is with S-Log. Cine4 is probably a better option for peeps rolling without a Shogun doing run and gun/doco/ENG work. Just like shooting H.264 exposure wise only with a lot more dynamic range.
 
Last edited:
In my tests, I found CINE4 clips white at ISO1000 at the same point SLOG2 clips white at ISO3200. I would guess they both use the full DR, but that CINE4 has the same hardware gain applied at ISO1000 that SLOG2 has at ISO3200. This follows with the relationship that CINE4 and SLOG2 have on the FS700 where 0db gain is ISO640 for CINE4 and ISO2000 for SLOG2. I wouldn't be surprised if they had about the same noise performance at those settings if graded to match.
 
macgregor said:
I've finished my tests with the A7s and they'll be published soon at DSLRmagazine.
11 stops of usable dynamic range in Slog.
11 stops of usable dynamic range in Cine4.
4K test charts will be provided. :D
Click to expand...

Sorry to be a fanboy here, but just realized you are the guy who made "The Moment After" on vimeo from years back! That was one of the first quality shorts I ever saw on Vimeo.

Anyway, thanks for posting your tests! I've been following this thread so apologies if I missed this, but would you prefer to use the Cine4 gama (ND filtration aside) in most scenarios or are you leaning towards SLOG?
 
Are you all using the default PP for cine gamma 4 or customized? I've been comparing cine 2 vs 4 and I've noticed quite a noisier image with gamma 4 (at higher isos)
 
Regarding ND and the A7S--are you guys finding that the camera requires IRND's or can it work with straight ND's?

My plan would be to pick up an 8 stop ND (i.e., N2.4) for use with s-log2 in full sun, and then ride the ISO up a few clicks if it drops into shade. I'm not particularly impressed with the variable ND artifacts, as convenient as they seem.
 
I've done so much work getting the Hoya ProNDs out into the world. You guys should check them out. I can tell you without much doubt that they're comparable to TrueNDs and worth every cent.

Currently own two sets.

I'll be trying the firecrest formatt NDs out soon as well.

Here's the big-ol Hoya ProND thread from back when I discovered them and got a prototypeish set to try out: http://www.bmcuser.com/showthread.php?6403-ProND2-Now-Avail-Hoya-ProND-Rolling-Report-Thread
 
jhero said:
Are you all using the default PP for cine gamma 4 or customized? I've been comparing cine 2 vs 4 and I've noticed quite a noisier image with gamma 4 (at higher isos)
Click to expand...

I used the cinema PP, the default one looks strange.
 
CharlesPapert said:
Regarding ND and the A7S--are you guys finding that the camera requires IRND's or can it work with straight ND's?

My plan would be to pick up an 8 stop ND (i.e., N2.4) for use with s-log2 in full sun, and then ride the ISO up a few clicks if it drops into shade. I'm not particularly impressed with the variable ND artifacts, as convenient as they seem.
Click to expand...

It looks like there's a bit of IR pollution in full sun. I'm getting a Hoya UV/IR cut filter and a couple of the Hoya pro NDs. I tried a Tiffen vari-nd once, I won't be using it again. A set of these will save time http://www.bhphotovideo.com/c/product/969998-REG/xume_77mm_lens_adapter_pro_kit.html

Pro tip: I got one of these: http://www.dpreview.com/forums/post/53572733 now I can see!
 
squig said:
It looks like there's a bit of IR pollution in full sun. I'm getting a Hoya UV/IR cut filter and a couple of the Hoya pro NDs. I tried a Tiffen vari-nd once, I won't be using it again.!
Click to expand...

I use the Tiffen - seems fine to me. Yes there is some coloration but easy to filter out in post. The sharpness seems unaffected.
 
ejdge said:
Here's some A7s car footage intermixed with a C100. The A7s was used for the interior/exterior detail shots and I tried the 720/120 for slow motion (ugh never doing that again). I love the camera but damn is it ever hard to expose properly. A7s footage was shot using Kholi's pp6 profile and graded with Osiris m39-709 LUT and Film Convert 2 Pro. Had to use a Lee Little Stopper ND Filter (6 stops). A Canon 100mm 2.8 L was used for all the A7s shots.

I'm still learning how to use the camera effectively and definitely open to criticism!

Click to expand...

I couldn't tell any difference. That's what is great about this camera.
 
You must log in or register to reply here.
Back
Top