July 24, 2015
Canon 5DSr Noise Issues
I’ve returned from my first outing with my new Canon 5DSr and wanted to report back on what I thought of my first images.
The image above was shot at 1/80 of a second and I was impressed with the quality. I was able to blow it up much larger than images from the 5D Mk III and have it hold its detail. I am happy with the quality of this image.
The next image is from the Spiral Jetty on the Great Salt Lake, this image was shot at 240 seconds:
The quality of this image was very disappointing. I opened the RAW file and it was so noisy that I didn’t think that I could salvage this image. By using the dust and scratch filter in Photoshop and by adding grain, I was able to make this image “acceptable.”
I suspected the noise came from the long exposure and I was in fact worried about this going in. The larger number of pixels packed into the same area means that the pixels are smaller and more prone to noise, especially during long exposures. But I didn’t expect this poor of a result.
I then found the same image that I had shot at 120 seconds and compared a blown up section of the two:
The noise at 120 seconds is reasonable while at 240 seconds the noise is completely unacceptable. I only have a few shots to judge this by, but all of my longer exposures have this noise and so I’m sorry to report that my first results with the 5DSr are disappointing from a long exposure perspective.
I will do some formal testing to see how exposure times affects noise levels. As I learn more, I’ll let you know what I find. And if you know something about this issue, please share it with everyone.