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Sony Alpha a7s: Full HD Recording in XAVC and 4:2:2 UHD 4K Output via HDMI.


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Old May 10th, 2015, 01:45 PM   #16
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Re: Bristol Harbourside, England

Here's a video I shot today. I switched back to my Sony Zeiss 55mm prime lens. Images are much better and sharper all round compared to the 18-105mm zoom. I'm looking to order the 28-70mm zoom to take its place which will hopefully compliment the prime lens.

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Old May 11th, 2015, 01:21 AM   #17
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Re: Bristol Harbourside, England

I can see that the lens is definitely better. It just looks a bit softer than I would have expected - possibly from encoding settings or something.

It's beyond me what is doing it. More contrast needed, perhaps?

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Old May 11th, 2015, 01:59 AM   #18
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Re: Bristol Harbourside, England

I think the encoding to You Tube is definitely making a difference. Pictures are much sharper and brighter on my laptop.
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Old May 11th, 2015, 05:57 AM   #19
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Re: Bristol Harbourside, England

Is it possible to encode to 1080p at 10Mbit/sec mp4?

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Old May 11th, 2015, 09:39 AM   #20
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Re: Bristol Harbourside, England

I have the default You Tube export setting in FCP X set to 1080p and Better Quality for the encode.

But, the You Tube Ghost Boats upload file size is still only 521MB compared with the normal Pro Res 422 which is much, much bigger at 3.29GB. So, regardless of how you shoot, it's still going to be compressed quite a bit which will lead to a reduction in quality.
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Old May 11th, 2015, 04:58 PM   #21
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Re: Bristol Harbourside, England

Even a raw camera video clip uploaded direct to YouTube would be a start for a proper test sample (much like what I did).

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Old May 22nd, 2015, 11:44 AM   #22
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Re: Bristol Harbourside, England

I would suggest that isn't a matter of applying in-body lens correction. That's really wonky looking. Looks like Vaseline is smeared on the right side of the lens. Defiantly not right. (I upload a ton to YouTube, and can confirm that's not an artifact of their transcoding.)
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Old May 26th, 2015, 08:30 AM   #23
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Re: Bristol Harbourside, England

The strange thing is other footage shot using this lens a few months earlier looks much, much better.

And, even on this video, when zoomed in their isn't any smear/bluriness, etc - it only appears on the very wide shots. I do use a screw in ND filter but it's the same make (Hoya Pro) as on my other A7s lenses and I've not had any problems with these.

Strange indeed...anyone have any thoughts as to why this may be??
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