Posts Tagged ‘issue’

A Time-Lapse Showing How Quickly Dust Accumulates on Nikon D600 Sensors

Back in October, we wrote that the Nikon D600 suffers from excessive sensor dust in the upper left hand corner of the frame — something many owners have been reporting and a flaw confirmed by review sites such as DPReview. Toronto-based artist Kyle Clements wanted to test this himself, so he bought a new D600, pointed it at a white piece of paper, shot 1000 frames, and created the time-lapse video above.
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The Nikon D600 Has Sensor Dust Issues

We tend not to get too excited about sensor dust problems at LensRentals; we clean sensors on every camera after every rental, so it’s just routine. When we started carrying the Nikon D600, they all arrived with a fair amount of dust, but that’s pretty routine, too. Manufacturing and shipping can be a dusty experience.
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The Autofocus Noise of Canon’s New 40mm Pancake Lens

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.

(via Dan Carr via Foto Actualidad)

Canon 5D Mark III “Light Leak” Issue Alters Exposure by 1/3 of a Stop

A quick update on the “light leak phenomenon” on the 5D Mark III that Canon confirmed last week: after emailing Canon about the issue recently, photographer birdbrain received the following response:

Further to your enquiry we would like to inform you that we very recently (in April) have become aware of this and is now a known issue with the EOS 5D Mark III model. The AE sensor in the camera detects the light from the LCD panel when it is turned on and the exposure value will be altered. The change is not significant as it will be altered by approximately 1/3rd of a stop but can be noticeable. You can continue to use your 5D Mark III and the LCD screen can be turned off to receive the correct exposure.

The video above shows examples of what this 1/3 stop difference does for nighttime photographs. The issue definitely isn’t a huge one (don’t cancel your orders), but the 5D Mark III is a $3,500 camera and it’ll be interesting to see how Canon decides to deal with this flaw.

(via DPReview via Canon Watch)

Canon Confirms “Light Leak” Issue in the 5D Mark III

Earlier this month, reports started emerging that Canon’s new 5D Mark III DSLR has a “light leak” issue. Photographers found that turning on the LCD backlight in a dark room directly affects the camera’s metering system (as seen in the video above). Canon published a product advisory today acknowledging the issue, saying,

In extremely dark environments, if the LCD panel illuminates, the displayed exposure value may change as a result of the AE sensor’s detection of light from the LCD panel.

The phenomenon […] has been confirmed when using the Canon EOS 5D Mark III Digital SLR Camera. Canon is now examining the countermeasures and once the countermeasures are decided, we will post the information on our Web site.

Problem is, the issue isn’t limited to the LCD’s backlight in a dark room. Apparently any light (e.g. sunlight) shining onto the LCD screen can affect exposure.
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Facebook Has a Zombie Photo Problem

Ars Technica published an interesting story today about how photos uploaded to Facebook remain on their servers months — or even years — after they’re “deleted” from the service. We decided to test this out ourselves, uploading the above photo to Facebook, copying the direct URL to the image file, and then deleting both the photo and the album. As you can see from the hotlinked photo above, the image continues to live on as a zombie photo on Facebook’s CDN servers.
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