Sony Guy Posted March 26, 2015 Share Posted March 26, 2015 Something I never have understood is quite how digital cameras can record video without a shutter opening & closing repeatedly, and, if that is possible (which it obviously is), then why can't the camera just "activate" its sensor for a minute segment of time, (such as 1/60, 1/125, 1/250 etc.) and totally do away with the heavy, complex, vibration-creating shutter mechanism entirely? m7888 1 Link to post Share on other sites More sharing options...
Advertisement Posted March 26, 2015 Posted March 26, 2015 Hi Sony Guy, Take a look here Why Even Have A Shutter Mechanism Anyway?. I'm sure you'll find what you were looking for!
Jan Anne Posted March 26, 2015 Share Posted March 26, 2015 Because Sony still uses a rolling shutter, they're working on a global shutter though. An interesting video which should explain shutters: https://youtu.be/CmjeCchGRQo Link to post Share on other sites More sharing options...
Max the Dog Posted March 26, 2015 Share Posted March 26, 2015 Why not just dispense with the lenses while were at it ? Something I never have understood is quite how digital cameras can record video without a shutter opening & closing repeatedly, and, if that is possible (which it obviously is), then why can't the camera just "activate" its sensor for a minute segment of time, (such as 1/60, 1/125, 1/250 etc.) and totally do away with the heavy, complex, vibration-creating shutter mechanism entirely? Link to post Share on other sites More sharing options...
Vivek Posted March 26, 2015 Share Posted March 26, 2015 Why not just dispense with the lenses while were at it ? Oh, no! Where would you put a lenscap then? Max the Dog 1 Link to post Share on other sites More sharing options...
Guest PenGun Posted March 27, 2015 Share Posted March 27, 2015 Well I had no shutter for this shot. Just a Schneider Symmar S 240 lens with no shutter at all. Link to post Share on other sites More sharing options...
Sony Guy Posted March 27, 2015 Author Share Posted March 27, 2015 Well I had no shutter for this shot. Just a Schneider Symmar S 240 lens with no shutter at all. So... How did you regulate the exposure then? Link to post Share on other sites More sharing options...
Vivek Posted March 27, 2015 Share Posted March 27, 2015 I think he used his hat. Max the Dog 1 Link to post Share on other sites More sharing options...
Guest PenGun Posted March 27, 2015 Share Posted March 27, 2015 So... How did you regulate the exposure then? LOL. It's a trick you do with 2 dark slides. I was aiming for 1/8 sec. I came pretty close. Link to post Share on other sites More sharing options...
Max the Dog Posted March 27, 2015 Share Posted March 27, 2015 The shutter part is easy. Teaching a cat to jump a motorbike over 12 flaming school buses is the hard part. LOL. It's a trick you do with 2 dark slides. I was aiming for 1/8 sec. I came pretty close. Link to post Share on other sites More sharing options...
Guest PenGun Posted March 27, 2015 Share Posted March 27, 2015 The shutter part is easy. Teaching a cat to jump a motorbike over 12 flaming school buses is the hard part. Nah, be too hard to print. That one comes up all sumtuous on my Eppy 3800. There is something about, way too many pixels, for B&W prints. Link to post Share on other sites More sharing options...
Lefty Posted March 28, 2015 Share Posted March 28, 2015 PenGun, I've got a cat like that, he wants the keys to the truck and the dog to work the pedals while he steers. "then why can't the camera just "activate" its sensor for a minute segment of time, (such as 1/60, 1/125, 1/250 etc.) and totally do away with the heavy, complex, vibration-creating shutter mechanism entirely?" The problem is in the "etc". Video frame rate is slow, so you've got time to process. When exposure gets short, 1/1000 for example, you don't have much time to poll the sensor. It's a straightforward question of how quick you can read and move data. If sensors quit getting denser and we get more processing bandwidth we'll be able to ditch that mechanical shutter. Until then, the electronic first curtain that gets us half way there by turning the sensor on is as good as it gets. Link to post Share on other sites More sharing options...
Guest PenGun Posted March 28, 2015 Share Posted March 28, 2015 PenGun, I've got a cat like that, he wants the keys to the truck and the dog to work the pedals while he steers. I was very lucky. I was fooling with the camera and this 240mm barrel lens I had acquired in some deal. In LF you make a lot of deals it seems, well I did. Anyway she jumps up on the bike and gives me the 'why are you not paying attention to me' look and the rest was pure serendipity. Link to post Share on other sites More sharing options...
Lefty Posted March 28, 2015 Share Posted March 28, 2015 Got the impression that as far as she was concerned the bike was really just a cat stand. C'mon Daddy, quit fooling with that camera, take me for a ride. Link to post Share on other sites More sharing options...
Golem Posted March 31, 2015 Share Posted March 31, 2015 ` @SonyGuy, If you wanna buy a Shutterless Sony, and you have a bit over $2K mad money, get you an A7S. Spoiler alert: It DOES have a shutter ... but you don't hafta use it. It can operate in a true silent mode, which involves electronic 1st curtain ... AND 2nd curtain ... such that the mechanical shutter is not involved at all. Acoarst this returns us to a version of your original posting: "Why would an A7S user engage the mechanical shutter ?". Technically, there are reasons, but they're not very compelling for most users. If I had one I doubt I'd ever engage the shutter. ` Link to post Share on other sites More sharing options...
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