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View Full Version : Basic questions re: DRebel

J. Cobble
23rd of February 2004 (Mon), 07:41
1. When shooting in RAW, is the image 16 bit or 8 Bit?

2. Is there a way to lock the mirror up for long exposures?

Thanks
Johnnynf
23rd of February 2004 (Mon), 07:56
Wow, a question that I can finally help answer.

1. I am not sure what the picture is actually taken in, but I know that when you save the RAW file to the computer, you have the option to save it in either 16 or 8 bit TIFF.

2. Yes, you can set the camera for a bulb exposure and leave the shutter open for as long as you like (well, I think there may be a limit, but it is still a really long time).
Kinger
23rd of February 2004 (Mon), 08:03
I believe that the RAW file is actually 12 bit. But I am not positive.
Scottes
23rd of February 2004 (Mon), 08:04
Yes, it's 12-bit, but it's saved in a 16-bit format since there isn't a 12-bit format.
CyberDyneSystems
23rd of February 2004 (Mon), 08:19
1. The raw file is 12 bit and can be saved and worked on in either 16 bit (which will preserve all of the color info) or 8 bit.

2. Although the Drebel does allow a bulb exposure for long shutters.. there is no specific "mirror lock up" function.
J. Cobble
23rd of February 2004 (Mon), 09:08
Ok, so what are you converting the RAW info with because I dont see any option in the software that came with the camera for 8 or 16 bit??

Also, the problem with the mirror is camera shake from the mirror. Oh well..... :evil:
Johnnynf
23rd of February 2004 (Mon), 09:25
You do your RAW conversion using the Canon File Viewer Utility that came with the camera. The instructions for this are in the big software instruction book (not the instructions for the camera itself). Then, after the conversions, when you are saving the files to the computers hard disk (or whatever else you want to save it to), there is an option in the dialog box that asks you if you want to save it as a JPEG, 8 bit TIFF, or 16 bit TIFF. I hope that is clear...it is hard to remember exactly what every little box on the computer says as I do not have the software here with me at work.
dtrayers
23rd of February 2004 (Mon), 11:06
Also, the problem with the mirror is camera shake from the mirror. Oh well..... :evil:

There has been a lot of discussion about camera shake due to mirror slap and the general consensus is that it really isn't a big issue.

I've done some of my own testing trying to measure it and I've found it not to be problem.