Jump to content
Andrew Reid

Why you're better shooting video in stills mode on the Sony A7S

Recommended Posts

EOSHD Pro Color for Sony cameras EOSHD Pro LOG for Sony CamerasEOSHD C-LOG and Film Profiles for All Canon DSLRs

LOL... :D.  Point taken.  I have an advantage over P B as I then have so much more to learn!

 

However I bought a very expensive 64Gb SDXC card to enable XAVC-S.  I also bought a Sigma 18-35 F1.8 ART lens.  I definitely now see a better image with less noise.  I compared the image last night to my GH4 with a 17.5 Voigtlander F0.95 fitted.  I was amazed on how good the GH4 image was up to ISO 800.  The tests were done 30 min. after sunset with some sky glow left.

 

I had to fit the Sigma to the A7s via a "cheap" NEX - Canon lens adapter.  When zoomed in I see a large blacked out image with clear video in the "inner" part of the image.  As I zoom out the black on the outer sides starts to disappear until about 70% zoomed out where after I start to see the full image.

 

Is this caused by the cheap adapter?  Will a Metabones speedbooster cure this issue?

 

*****

 

Friday 5 Dec.

 

I made a silly mistake and thought that the "auto" in the APS-C mode would detect the lens automatically.  I did not!  I manually activated APCS-C mode and now the adapter & lens seems to be married well to the A7s!

Share this post


Link to post
Share on other sites

When shooting s-log, if I set up a scene in stills mode so that the camera thinks the scene is correctly exposed, as soon as I begin recording the exposure readout changes from 0.0 to + 0.7. That is, it thinks it's over-exposed by 0.7 stops.

 

Another way to test the same thing, is to set up a scene in stills mode with the exposure meter reading 0.0., then without changing anything turn the dial so that the camera is in movie mode. The readout will change to +0.7. (It's usually + 0.7, sometimes more).

 

I'd be interested to know what's causing this.

Share this post


Link to post
Share on other sites

I'm having a major bug with this mode in regards to the aperture opening up when hitting record.

 

In stills mode, I'll set all my settings, and as soon as I hit record, the aperture will open to the widest setting, but on screen it will still say the original aperture value. Then, while recording, I need to set the aperture in camera to wide open so it will reset, and then can set the aperture back to the value that I originally had it set at, and that the screen was displaying.

 

Ex. Aperture set to f8. Press record, screen tells me aperture is still f8, but the live view gets overexposed and I can tell it's gone wide open. I then need to adjust the aperture to the most wide open setting, and then I can adjust back to f8.

 

I'm using the Commlite adapter and have this issue with a Canon 50 1.4 and Tokina 11-16 2.8. I haven't tested other lenses yet.

Share this post


Link to post
Share on other sites

The A7S performs different processing for live view in stills mode vs. movie mode. Colors also shift. Recommend shooting video in movie mode, especially if using an external monitor (no HDMI reset at record start/stop as with stills mode).

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...