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Sony A7S rolling shutter test


Andrew Reid

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>Here's a test from the EOSHD forum which shows me what I was a bit afraid of. The A7S looks to have similarly extreme rolling shutter to the AX100, at least in the early pre-production firmware stages.

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As someone who actually tested this in person. The a7s was only slightly worse than the Canon 6d I had on hand. While that's not amazing, it's far from a deal breaker. Sony reps said that the firmware

If the prosumer camera footage I watch on vimeo is indicative, 99% of the people who will buy this camera won't rack focus, let alone pan the camera. I'm pretty sure non professionals who buy multi th

There goes my dreams of ghost hunting with this camera. Going to be a lot of leaning Slimers in the frame.  

If Chubby isn't available about Den Lennie? :)

 

This explains all the slow moving and locked down shots in all that beautiful footage we've seen so far.  I guess they didn't want to let the cat outta the bag too early.   I can't help feeling this is nothing more than a bridge camera to something far better coming soon from Sony. It's not really 4k, but it is,... it's great in low light, but it's processing power isn't good enough to control the rolling shutter.   Maybe next year though.   

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"Given the low price of these cameras it seems reasonable to consider using both the GH4 and the A7S, applying each camera when a scene might play to their individual strengths."

 

 

This is what i was thinking too. Shooters like me, this is dream come true. GH4 as a main Camera and to complement that there is A7s.

Freedom at last!

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Larger sensor is going to have more problem with rolling shutter. The solution should be develop sensors with global shutter.  Sacrifice some of the sensitivity in exchange for solving this problem.  

 

I don't think it's so much the physical sensor size as the amount of data to read off it. 4K is a lot of pixels. 2160 lines is double the number to scan than 1080. It takes twice as long, so to compensate you have to speed up the rolling shutter. Sony have not done this enough.

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Larger sensor is going to have more problem with rolling shutter. The solution should be develop sensors with global shutter.  Sacrifice some of the sensitivity in exchange for solving this problem.

 
Unnecessary. With a stacked sensor design, the global-shutter circuitry could be on a separate layer. Read comments by Alternative Vision's David Gilblom on this Image Sensors World post about the Epic Dragon sensor. Apparently, with global shutters, you can have your cake and eat it, too.

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There goes my dreams of ghost hunting with this camera. Going to be a lot of leaning Slimers in the frame.

 

slimer-skew.jpg

 

Well, you can always team up with Steve Huff, and ask him for ghost hunting tips.  :P

 

BTW, whoever did that wiggling seemed to make sure it looks as bad as it possibly can. I don't know which lens was attached to the camera, but he zoomed it in all the way to the telephoto end, which will obviously magnify the effect.

 

Nevertheless, if the price will actually land somewhere near three grand or even more, that, together with he wiggle might make it hard to justify the purchase to myself. But better to wait and see, ignoring the hype, until the final product is here, along with the final price tag.

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