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Old Apr 29, 2004, 3:26 PM   #1
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Default Canon EOS 1Ds - B&W mode?

Does the Canon EOS 1Ds have a black & white mode, and if so, how do I set it?

If not, what's the best way to get as close as possible to an accurate brightness image - ie, minimal processing? Set all to manual with no corrections, or does selecting RAW format do that?

What's the highest dynamic range I can get out - ideally, more than 8-bits is desired...10-bits, 12-bits, 16-bits? What's the highest I can record and download in a RAW image.

I am using the camera in the lab to study the relative intensity of laser lighted areas. Ideally, this would mean a calibrated instrument, but since I need spatial data, the camera seemed a more efficient way to collect a lot of data. I am using the camera without a lens, and making a series of exposures with the distribution projected directly on the CCD, and using neutral density filters for each step to cover the extended dynamic range that can't be recorded with simple 8-bit (24-bit color) images.

Thanks!
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Old Apr 29, 2004, 4:21 PM   #2
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no. no B&W mode.

there are various plug ins for PS that will give you a good range in B&W.

as you raise the iso the dynamic range will start to shrink.

shoot RAW and convert to either Tiff or 16 bit jpg

http://www.fredmiranda.com/shopping/BW
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Old Apr 29, 2004, 5:33 PM   #3
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sjms...

Thanks! That confirms what I doscovered in reading what I could about the camera. But with so many features, I wanted to make sure I didn't miss it someplace.

I have plenty of light, so will use the lowest ISO, shoot RAW and convert to TIFF as you suggest.

Thanks again!
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Old Apr 30, 2004, 2:44 PM   #4
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Optiker,

With Photoshop you can convert to LAB mode wereby you isolate the illuminance from the color channels. Using the Illuminance channel only you have a gray scale of 0 to 100 which may serve your measurement needs.

Ted
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Old Apr 30, 2004, 4:42 PM   #5
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For the record, the channel is called Luminance. That's what the L in LAB stands for - (L)uminance, A-color, B-color.
I'm not trying to start a flame war or knock your spelling, just giving corrected information.
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