This is correct. My D300 is the same. But if you set the shutter mode to Ch and fire off continuos shots until it stops and then half press the shutter release you'll see the buffer come back from r01, r02 etc until it empties and shows r06 again.
Tue 23-Jul-13 11:33 AM | edited Tue 23-Jul-13 12:16 PM by Leonard62
Neil, My D300 shows r06 in every quality setting from raw fine to jpg basic. I bought my D300 in February 2008. Did Nikon increase the buffer at some point? Or is there a setting I'm missing?
edit: I just Googled D300 buffer and found three sources, including DPreview that report r12 in all modes. They were all reported in 2008. Neil, if your D300 reports r17 you must have a hotrod mode. I'll see if I can find it on my camera.
edit #2: I think I found it. I had Long exp NR on. With it turned off I now get r12. Also with HI ISO NR off I get r15.
Long exposure NR (LENR) stores 2 frames for each image, the 2nd frame is a "dark frame", similar to shooting a frame with the lens cap on.
It would be interesting to see if you really only get 6 or 7 frames with normal shutter speeds because LENR supposedly only occurs if the shutter speed is slower than 1 second (or so-forget the exact number). Just an idle thought in the interest of science . In other words, it is possible you would actually get double the "rxx" value for normal shutter speeds. Unfortunately I don't have time to do science experiments today .
My D700 indicates a few less frames than Thom Hogan's eBook numbers, which were based on his usual detailed testing. It has never been clear to me why that number varies by a few frames. All the cameras of the same model should have the same identical buffer capacity.
Just to say I cannot explain your r15 vs my r17. I just knew R06 was "too low" for normal settings. (I do not activate LENR by default because I do not believe it is generally necessary with my cameras but that is another debate!).
I think DPR's r12 is low, based on my recollection of discussions here, but I never studied their test findiongs.