Do DSLR's digitally resize at lower resolution setting?

[Tremont]

I can't find this info, probably because almost everyone takes shots at the highest setting in RAW. If anyone has any thoughts, let me know:

If you take a Canon DSLR, 450D in this case.
And you lower the quality setting to a lower resolution.
Does the camera take a full resolution shot, then digitally resize to the smaller resolution (as opposed to the sensor taking the picture at a lower resolution native)?

I'm trying to figure out if taking a picture in a native lower resolution will yield the same sharpness as taking a high resolution shot then resizing in post process.

-Tre

 

[aquariumclown]

Someone can correct me on this. But I think if you set quality to lower res, the camera digitally resize in-camera. My guess it's the same as digitally resizing unless you use really crappy software that has bad compression algorithm.

 

[Recty]

I'm going out on a limb but as far as I know the sensor cant just turn off half it's pixels, or 1/3 it's pixels, or whatever setting you're using. It has to record all the data hitting it, then that gets stopped down to the megapixelage that you want.

No matter how it does it, it is digital resizing And yes, it should give the same quality image as if you took a high res image and resized it in Photoshop.

Did you just realize you took 170,000 photos at a large resolution and now have to resize them all and wish you had just done it in camera?

 

[aquariumclown]

Recty, I think your right. I meant to say lower quality, not lower res.

 

[Tremont]

>Did you just realize you took 170,000 photos at a large resolution and now have to resize them all and wish you had just done it in camera?

Nah, I settled on medium jpeg a while back, resizing/cropping/encoding as video is np using virtualdub...it's just if I move back up to using a higher setting, I can't do as long of captures (until I have a better solution using the wireless ftp thing you can get for the mark ii).

-Tre

 

[TitusvileSurfer]

How long are your caprtures?! Days?! I think an 8gig CF card should let you should RAW all day.

 

[Tremont]

On my 16 gb card, I can do 5k+ frames on medium and I let it run that long often (think polling for neat behavior and adjusting playback speed via culling frames). I want to start using RAW more, because I have had several sequences ruined by bad white balance that I didn't lock down properly up front...I ordered a 32 GB card which will let me do ~1000+ RAW....

-Tre

 

[Hookup]

Please link to one of these vids... sounds cool...

 

[TitusvileSurfer]

Wow I have no experience with stuff like that...but...it sure sounds cool!