• Originals
    • Categories
      • Gear
        • Forum
          • Picture of the Day
            • Contests
              • More
                • FS Gear Guide
                • Fstoppers T-shirts
              • Home
              • Advertise
              • Meet the Writers
              • Submit Content
              • Contact

              I Thought I Understood Camera Shutters And Flash Until I Saw This

              I thought I knew everything about shutters, sync speeds, and flash duration until I saw this video by Paul Duncan. I smugly started playing this recommended video and I got schooled. Now I am up to speed and you will be too.


              February 4, 2011
              Lee Morris
              Tweet
              Favorites
              Film
              Gear
              Other
              « Freddie Wong Builds His Own Gun Shots
              Behind The Scenes On The 2011 Maybelline Calendar »
              • Jerry

                Does anyone here know more about the electronic shutter and why camera companies don’t use it with Cmos sensors? I remember reading it was only used with CCD. Surely we could go back to that method with CMOS or maybe now CCD technology is better to where we can get improved image quality AND high speed sync.

              • http://www.rlmorrisweddings.com Lee

                @Jerry, I have wondered the exact same thing. I’m not even sure if the cameras need mirrors anymore. They could create a camera with a super HD digital viewfinder and there would be no shutter delay, noise, or syncing issues. Maybe one day.

              • http://flickr.com/photos/daverichie David

                Thanks for this video, it was really informative!

              • http://www.fotovoyager.com William Fawcett

                Hey, that really is a good tutorial video!

              • http://www.bmcphotography.info Brian

                @Lee The camera you described already exists as a HDSLR — the Sony a55 and a33 bothe use a beam splitter to have simultaneous images on the viewfinder and on the sensor. The compromise is that the viewfinder is electronic, not optical. I don’t know if that would bother you, but it would bother me.

              • http://www.rlmorrisweddings.com Lee

                @Brian, very interesting! Now if we can just get a real camera manufacturer to make one… I kid!

              • MK

                @Lee: Without a mirror, no fast phase detection AF is possible.

              • http://www.benpettitcommercialphotography.com/ Ben

                Thanks for this video. Posting it to my blog for sure. I always wondered about 2nd curtain flash. Very cool!

              • Kyle

                I am still partial to the way my D70′s sensor works – unlimited sync. The curtain’s maximum speed is 1/250 and everything after that is electronic shutter via the nature of interline CCD’s. However, there is a -huge- penalty for it: the rows on the CCD alternate capture rows and data saving rows, so the 6mp camera actually has 12mp worth of dots – small dots leads to high noise. In traditional CCD sensors, you have a row on the edge that sends the data back, one captured row at a time, so if you have a few thousand dots worth of data, it needs to be done in darkness.

                …long story shot, it’s all about sensor design: you want maximum area for capturing elements (pixels) else you have bad noise.

              • http://brettmaxwellphoto.com brett maxwell

                MK is right about AF, you need a mirror, or a beam-splitter like Sony has done, which has inherent light loss.

                But I do really wonder why CMOS sensors haven’t been used for electronic shutters. They’re certainly capable of it, since that’s what you’re doing when you use DSLR video, which can do high shutter speeds.

              • http://www.jacopotarantino.com Jacopo Tarantino

                I think there are two reasons we don’t get a lot of these nifty features and they both have to do with sales.
                The first one is that camera companies need to maintain their long-term income. In many cases this means not introducing every new feature they can at once so that they can keep introducing new models and new technologies to keep you upgrading.
                The second reason I think has more to do with our habits and fear of the unknown. It would be weird if Canon suddenly released some new super-camera that had hundreds of new features you hadn’t heard of and cost 100,000$. It wouldn’t sell well because people wouldn’t know what to think about it and it would cost too much.

              • Antoine Thisdale

                Talking about strobes… What do you guys suggest for AA batteries?

              • http://www.patrickhallweddings.com Patrick Hall Admin

                Click on the gear guide we have up on the right hand side…then goto accessories maybe

              • http://www.danstoneimages.co.uk dan stone

                does that guy know how to party or what! :) that was really well explained, good vid! I’m desperate to do high speed sync but with my large lights, i can squeeze 320th of a sec out ok on my d300 with my abr800 and cheapo interfits, but i really wanna go just a bit faster as i can still see some blur :( maybe some DIY trigger mod to fire one flash fraction of a second after the first… anyone seen anything like that? so lee you guys not gonna be interested in the Sony E NXCAM range? :P

              • Jay

                Excellent – thanks for this

              • http://www.joeltrousset.com Joël

                Great video, Paul Duncan is a great teacher.

                One last resort technique for higher shutter speed is simply to frame larger, and then crop out the black bar.

              • Kevin

                The reason they dont use electronic shutters with CMOS sensors is because of rolling shutter. Cell phone camera use electronic shutters and have obvious rolling shutter.

              • Zimmie

                The reason most modern cameras with APS-C or larger sensors don’t use electronic shutters is as Kyle described. It requires one shielded pixel area for data storage for each pixel. When the first curtain has cleared the sensor, it zeroes all of the photosites. After they are cleared, charge builds up in them again because they are still being exposed to light. When the proper amount of time has elapsed, every shielded pixel reads from its unshielded counterpart and stores the value it finds. The camera only reads from the shielded storage areas. It’s like a buffer built into the sensor.

                This makes each individual pixel smaller, which means less thermal inertia and more noise at high simulated ISO speeds (actually, the ‘ISO’ rating at which you are shooting is the level of amplification applied to the data as it is read). It also means impractically low pixel counts for an industry where the majority of consumers don’t care about subtle features like this. Many people just pick the camera with the bigger number, just like the gigahertz war in computer processors.

                Newer photolithography techniques may allow for multi-layer sensors to be constructed (kind of like a Foveon sensor) with the shielded buffer pixels beneath the unshielded active pixels. This would likely be prohibitively expensive right now, but it is a logical future step for professional-level full-frame DSLR sensors.

              • Michael Errey

                A very helpful, clear and concise explanation Paul.. many thanks

              • http://www.carloparducho.net Carlo Parducho

                I got lost in between 2:49 and 4:20.

                1/250 and 1/125 sec. Ah I got those =)

                t.5 t.1 huh? Aren’t those the Terminator models?

              • http://www.facebook.com/photobytaps Taps

                Oustanding tutorial! I’ve been using second curtain flash on my Olympus e-10 and Nikon d70s for years. Until now, I never fully understood why they look so nice. Thank you for the great information and clarity.

              • http://www.zhphotographs.com Zac

                Great video. Very informative. Well done.

              • http://shirephoto.com Joshua

                This was very informative. The only other thing I didn’t come up with on higher sync speeds is just cropping out the black bar: Like this http://www.youtube.com/watch?v=JNYUXmN_wcQ

              • http://www.facebook.com/people/Vladimir-Belokrylov/100000624755854 Vladimir Belokrylov

                Brilliant!

              • http://www.facebook.com/matt.koby Matt Koby

                your DSLR video uses a rolling electronic shutter that functions similarly to the DSLR’s mechanical shutter, it does not record the entire frame at the same time like the D70′s Global shutter system, but rolls through the sensor vertically. which is why there can be motion artifacts when panning a CMOS DSLR or camcorder. it has to do with the actual electrical engineering of the CMOS sensors, currently no CMOS cameras or camcorders have global shutters, but i expect that we will see an improvement to this very soon.

              • Pingback: [B&H] Olympus E-PL1 - max shutter speed with flash. - Micro Four Thirds User Forum

              • Connect with Fstoppers
                Follow @Fstoppers
              • Fstoppers Originals
              • Popular Articles
                • What A Week Of Groceries Looks Like Around The World
                • My Top 8 Pieces Of Gear For Shooting Run And Gun Video On A DSLR
                • Flickr (Finally) Gets Total Design Overhaul, Adds New Features
                • The Story of How Law Enforcement Uses Photoshop to Fight Crime
                • Get a Stanford Education FOR FREE!
                • Canon Photographers Biggest Secret Exposed
                • Bulb Ramping Tutorial Makes Complicated Timelapses Look Easy
                • Behind the Scenes of South Carolina Gamecocks' Photoshoot
                • Airline Says 'No Photography' on Flights
                • Scientists take 3D Photos with Single Pixel Sensors
                • Categories
                • LensRentals Shows Us How to Clean Your Lenses for Dust and Effectively Scare the Crap Out Of Us
                • When and Where To Style Your Food Photography
                • How Would You Feel Being Secretly Photographed in Your House For An Art Exhibit?
              • Recent Comments
                • DebG. said $499.99 - beyond Wow... »
                • Bob Bell said Well I'm new to Flickr, as in never used so I'm impressed. Just wondered what everyone's feelings on uplo »
                • Tulaga Whitcombe said How bout "J.P. Morgan" teaches you how make money? »
                • James Robertson said Hmm, I may do a branding post on it's own as it's a big part about what I promote with my business as a w »
                • Julius_Caesar1 said To back an argument one must come up with statistics, if not backed up then it becomes weak and flimsy. T »
                • Julius_Caesar1 said To back up an argument one must support it with statistics and hard core facts, if not it becomes weak an »
                • Guest said To back an argument one must come up with statistics, if not backed up then it becomes weak and flimsy. T »
                • Guest said Let me also point out that companies that hire industrial and scientific photographers, don't look for a »
              • Support Fstoppers
                current nikon rebates deals
              • FS Originals
              • My Top 8 Pieces Of Gear For Shooting Run And Gun Video On A DSLR
              • Canon Photographers Biggest Secret Exposed
              • Endearing Animal Portraits By 18 Year Old Photographer Jessica Trinh
              • How to Go Pro Without Going Crazy
              • Fstoppers Sits Down with Lara Jade
              • Categories
              • Commercial
              • Video
              • Gear
              • Location
              • Strobe Light
              • Contests
              • Win a 30x40 Print
              • Alien Skin Retouch Contest
              • Win the Art Behind the Headshot
              • Black Rapid Contest
              • Win a Lowepro Bag
              • Random Posts
              • [FS Meetup] Come Grab A Drink In New Orleans At Bar Tonique
              • Arkansas Razorbacks Gigapixel Stadium Panorama
              • Look At Leica’s Pretty New Store in Miami
              • The Black Keys Behind The Scenes
              • Behind the Scenes of ‘After DayZ’
              • Picture of the Day
              • Cyclist
              • Ferris Wheel
              • Cloudbreak
              • Highway 90
              • Frankfurt Delay
              • Home
              • Advertise
              • Meet the Writers
              • Submit Content
              • Contact
              • Sitemap
              © Fstoppers
              Made by Novum