Shooting In RAW With CHDK For Beginners

In this video I will explain what settings you need to have inorder to shoot in a RAW file format using CHDK. I will also show you a comparison between JPEG and RAW pictures. RAW files are much larger and contain much more information compared to JPEG. Professional photographers like RAW files because they capture a picture in its purest form like a digital negative. Remember those little black rolls of film back in the day? They were called negatives. RAW pictures are like having the highest quality master or negative. But JPEGS take up less memory and your camera can process them faster.

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[xxxxxxxJIGSAWxxxxxxx]

Hi, Nate, I also have Sx30Is, and I do everything setings like you, but my camera shoot only in jpeg. If you know the problem, can you tell me?

[BigNate84]

@xxxxxxxJIGSAWxxxxxxx Did you have any trouble installing and running CHDK? You need to be in CHDK mode. You need to create a badpixel bin and you need to select DNG formatting. Also you need to choose what folder to put the RAW files. They can be placed in their own separate folder or be placed in the same folder with the JPEG's.

[xxxxxxxJIGSAWxxxxxxx]

@BigNate84 When I look at pictures from the camera, I do not see RAW files, but now when I transfer the file to my computer, there are RAW and JPEG files. :D Thanks! Cheers...

[BigNate84]

@xxxxxxxJIGSAWxxxxxxx Good work! Sounds like you got it.

[lezbriddon]

The raw picture shows the sides of the lens as its raw, very raw, its what the sensor sees before the cameras 'jpeg' routines crop out the bit that you see, there's always more sensor than 'saved image' thats why the quoted specs show a larger pixel sensor size than the output file size, your just seeing the bit the camera normally throws away

[BigNate84]

@lezbriddon Hey thanks for the feedback. That makes sense to have more sensor than saved image size. Out of curiosity, do professional DSLR's experience the same results shooting in RAW? By results I mean seeing the inside of the lens at the corners. I wasn't sure if this occurred because I was hacking a consumer grade camera or if the top of the line DSLR's experience the same thing and require cropping when shooting RAW. Thanks!

[xxxxxxxJIGSAWxxxxxxx]

@BigNate84 Yes, it is great!

[lezbriddon]

@BigNate84 I think there do have more sensor than saved image in most, its model dependent i guess, and the sx30 no doubt shows it more as they are really stretching the optics...

one thiing i have noticed is when zoomed out, the edges of the image show very bad chromatic aborations, take a wide angle shot and have a street pole at the ver left or right, then zoom that up in windows, it will have purple edges one side and green the other...

[spex357]

I'm thinking its named as a Motion detection script, good luck :-)

[spex357]

You will find the Lightening script on the CHDK Wiki, timings are crucial, get some info before going out, i ended up with nothing but learnt from my mistake, shame it hasn't lightened since