dbreview on the D800 and switching from Canon to Nikon

[jrw]

Resizing does explain the result. Combining the colour channels alone makes it possible to get there.

You are very quick on the draw in your replies. You replied while I was editing my earlier post with yet another question.

[Daniel Browning]

You are very quick on the draw in your replies. You replied while I was editing my earlier post with yet another question.

Thanks. I've got an itchy keyboard finger. Ten of them, actually. I'm a pretty quick draw.

Rereading Daniel's post at the top of this thread one other item caught my eye. Lightroom does not support 5D3 raw files as of yet. The link near the start of the post is supposed to be a 5D3 raw file that was opened in LR4. How can that be possible?

Same as usual - just convert the raw file to DNG with the new (beta) DNG converter.

I don't mean to be critical of Daniel's thought process by any means,

That's too bad. I probably need some of that.

[jrw]

One further question with regards to banding noise. While working with Photron SA5 high speed cameras at work I do notice that I can cause banding when I bitshift the image data to compensate for a lack of sufficient light at extremely fast shutter speeds (1/75000 s and up). Does anyone know if Canon RAW files are oriented to the most or the least significant bits when the 14 bit data is put into 16 bit file format? Logical follow up question is whether the RAW converters differentiate between LSB and MSB orientation?

[Daniel Browning]

Does anyone know if Canon RAW files are oriented to the most or the least significant bits when the 14 bit data is put into 16 bit file format?

Since the TIFF format supports both, the decision is left up to the individual raw converter. I would assume that most raw conveters just use whatever the default setting is for their tiff library, which in turn probably just uses the default for the host CPU (LSB).

Logical follow up question is whether the RAW converters differentiate between LSB and MSB orientation?

I'm sure. RAW converters have a lot of work to go through to support a new camera (building color matrix conversion, etc.), so I'd guess they wouldn't mind the effort required to support both types of endianness.

[jrw]

After reading this thread, I have finally found some time to download and play with RawTherapee. Really liking it!

Haven't tried six stops, but did do five with 5D2 and 5D3 as that was the maximum LR4 would allow. Interesting results for 5D2. Not pretty, but some of that was from the processing method in all fairness. Some banding showed up, as did a lot of colour splotching. The histogram changed from smoothish curves to being heavily notched. It appears that it applies a multiplication factor with no attempt to smooth the transitions. After seeing 5D2 results, I thought it might be best to try another piece of software rather than convert 5D3 shots to DNG and then push it up. Should mention that the high ISO shot also had less noise in it.

Tried Adobe Camera Raw current release candidate next as it 'supports' both bodies. After two stops of pushing 5D3 shots I just gave up on it. Plasticy look of over processing killed my spirits. White balance was affected in a notably cruel and unusual way as well. Did not use for 5D2 shots due to disgust.

DPP only supports two stops worth of adjustment so it wasn't a possibility.

RawTherapee resolves the colour blotching, but not the banding and noise that appears in the 5D2 shots. 5D3 is not yet supported. Previews are generated, I assume from the JPEG thumbnail in the RAW file, but when I opened the raw file it had a very unusual pink cast to it. Was able to do some cleanup on the 5D2 results, but not enough to think I'd ever want to exhibit the results. The banding and noise graininess is quite noticeable at 50% view.