I said I wouldn't post more 100% Crops of the 5ds-r for a time. But there was a discussion over at +Olaf Bathke
site about it. +Cole Thompson
who does some great long exposure photography also bought the 5Ds-R some time back and he found some serious noise issues for exposures of several minutes. See his blog post here:http://www.photographyblackwhite.com/canon-5dsr-noise-issues/
I also did some long exposure photography on my recent trip to France and my impression was that the 5Ds-R copes very well with long exposures. If shooting less than one or two minutes I never had issues with noise, even without Long Exposure Noise Reduction. Comming from the 5D Mark II I was used to using the LNR for long exposure, because the noise became quite apparent, if I went into the direction between 5 and 10 minutes -> hot pixels everywhere.
Below you see some crops of a photo I took before sunrise in Verdon Canyon (https://500px.com/photo/118144837/verdon-moon-by-michael-breitung
). I think it was allready around 20°C and I took two shots between 7 and 8 minutes. One shot I took without LNR turned on (Crops in first row). Because I didn't have much experience with the 5Ds-R I repeated the shot right afterwards with slightly adjusted ISO settings (Crops in second row). This time I had LNR turned on - this basically doubles the time you have to wait for the finished photo to popup up on the back of the camera and if the light is changing fast it's not always an option.
So lets look at the crops:
Upper left: I tried to exposed properly to the right but with the DR of the scene this still gave me some quite dark shadows. Mind I had the moon in the photo and I tried to also keep the bright parts. Without pushing the darks I don't see much noise there, for me this is acceptable for an ISO 200 shot of more than 8 minutes.
Upper middle: same crop with shadows set to + 100 in LR. Nothing else changed. Here you can see some dot noise. No real manifestation of the blue or red hot pixels but still not all too clean. But it's really not that much and I think I could have cleaned this a bit and been ok
Upper right: here's a crop showing some middle tones, also with shadows + 100. I see no issues here.
Lower left: I took this shot directly after the first. I went down with the ISO a bit since it was getting brighter but while taking the exposure I decided to slightly lengthen it since more clouds were crepping in front of the moon. The crop is again with shadows set to + 100 in LR. Here I shot with LNR turned on and this totally eliminates the strange dot noise. For me this looks quite clean.
Lower middle: this is a crop of the final developed photo. I usually end up with a slightly darker shot than what I start with. From raw I try to get as much image info as possible and then I try to recreate the atmosphere as it was. If you look at this crop on a dark background you see the detail there. But mind that this is from the edge of the frame, so you won't get as many details as in the middle at 100% due to restrictions of the lense, which was the Canon 16-35 f/4. Also due to lense correction and some cropping the crop is slightly different than the others.
Lower left: crop of final images for the middle tones.
I will do further tests in the future but my experience till now is that the 5Ds-R will serve me very well.