D70 Continuous Speed

[fergusd]

Anybody using a D70 noticed . . .

Running in continuous shooting mode and RAW image mode the camera runs about twice as fast as in any other picture size/resolution . . . albeit you have very few images at this speed . . . before you fill the buffer . . . this would be with the same scene, and program settings . . .

The speed I'm talking about is BEFORE the camera memory is full and is therefore not compactflash speed limited . . .

Am I missing something or does this not make sense ?

Ok, compressing large images may take some time, but compressing the small images surely doesn't take that long ?

I've also started looking at about 300 pics to took while on holiday . . . a few here

www.woolymonkey.co.uk/images

Fd

Fd

[ThatPhilBrettGuy]

fergusd said:

Ok, compressing large images may take some time, but compressing the small images surely doesn't take that long ?

Yup, it does. Just see how long a RAW -> JPEG conversion that's on a PC (ok or MAC ) even on the quickest modes. And that's with a big processor. Camera's have lots of hardware specifically for doing this work, but with the power available i.e. a few mWatts rather than the 50-90Watts for a desktop chip it's a very tuff job.

[simpo two]

If it's using the buffer I don't see why the speed should change whether shooting RAW or JPG. You should get 3fps regardless, though for varying numbers of shots until the buffer is full. I think there's a chart of this on dpreview.com.

If you can't get 3fps, you probably have noise reduction set to ON in the menu.

And from what Phil says, it might well take longer to convert RAW to JPG than RAW to NEF, as more crunching is required.

[fergusd]

The comparison I make is only in the buffer zone . . . where you're writing straight into the buffer . . .

I do have NR enabled . . . but thought it was only active for long exposures . . .

I'll have a play with the NR setting and see if that makes any difference . . .

Edited to say : surely NR impacts RAW mode too . . .

Fd

>> Edited by fergusd on Friday 10th September 12:15

[simpo two]

fergusd said:

I do have NR enabled . . . but thought it was only active for long exposures . . .

Nope! Though it would be sensible to set it so.

fergusd said:

Edited to say : surely NR impacts RAW mode too . . .

Shouldn't do - because the whole point of RAW is that it's the 'raw' data from the chip with no processing. You do that later in PS etc. Think of RAW as a digital negative.

[fergusd]

simpo two said:

fergusd said: I do have NR enabled . . . but thought it was only active for long exposures . . . Nope! Though it would be sensible to set it so.

Interesting . . . I've looked through the manual and can only enable or disable long exposure NR . . . manual claims to only use it on exposures of about 1S or longer . . .

however . . .

It it indeed the cause of slow continuous shooting even in bright daylight and high shutter speeds . . .

simpo two said:

fergusd said: Edited to say : surely NR impacts RAW mode too . . . Shouldn't do - because the whole point of RAW is that it's the 'raw' data from the chip with no processing. You do that later in PS etc. Think of RAW as a digital negative.

Aye, fair enough ;-)

Fd