Unfortunately, what with major changes at the helm and making sure that we hit 2014 running, we weren’t able to make it to Vegas for CES this year. And I say unfortunately because, not only does it mean we’ll have to wait a minute to get hands on with some of the new releases, but it also meant missing cool demonstrations like the ones you see above.
Posts Tagged ‘stm’
DSLRs and Compact System Cameras are becoming increasingly capable video capture devices in addition to being solid still shooters. But when it comes time to focus or zoom using the lens’ or camera’s built-in motor, you’re often left with glaringly obvious noise on your soundtrack.
So far manufacturers have tackled this problem by introducing silent focusing motor lenses, but one group of engineers is taking a firmware-based approach that seems to work just as well (if not better) and might someday soon do away with zoom and AF noise entirely. Read more…
As Canon has begun focusing more adamantly on making its DSLRs capable video capture machines, the company has had to adjust its glass to match. The new Dual Pixel AF on the 70D is a great improvement (check out these videos if you doubt that) but if you’re planning on shooting video using the autofocus, you’ll probably get to the point where you have to choose between buying a USM lens and an STM lens.
When that time comes, the video above by YouTube user marconilanna should make that choice a little easier by showing you the differences — in both noise and speed — between one of Canon’s STM lenses and a few older USMs. Read more…
Canon made a splash earlier this month by announcing its first EF pancake lens, the Canon 40mm f/2.8 STM. If you’re considering this lens, one thing you should know is that the autofocus noise may interfere with your videos unless you use an external mic. In his review of the lens, photographer Dan Carr writes,
Here then is probably the biggest problem with this lens. With any other Canon lens, if you think the AF motor is making too much noise you can either switch to manual focus mode to disengage the focus motors or with Canons l-series lenses and their ultrasonic motors you simply just turn the focus ring manually yourself and it doesn’t engage the noise producing AF motor. Unfortunately though, the STM motor works in a different way [...] Even when you switch to manual focus mode, rotating the the focus ring engages the STM motor to move the lens elements as the whole thing is a focus by wire system. This means that there is absolutely no way for you to get a silent video. Whether you let the camera do the focusing, as with the new cameras like the 650D/T4i , or whether you do it yourself, you are going to get the background hum as demonstrated in my video
It’s an interesting quirk, since the STM technology is meant to provide smooth and quiet focus for video recording. It may be quiet (here’s a comparison with the 50mm f/1.8 II), but you can’t eliminate it completely. On the flip side, the lens is attracting rave reviews.