Tom's Hardware > Forum > Digital Camera > Digital SLR > File Size Question . . . .Canon 300D

File Size Question . . . .Canon 300D

Forum Digital Camera : Digital SLR - File Size Question . . . .Canon 300D

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Anonymous   12-18-2004 at 04:22:06 PM

Archived from groups: rec.photo.digital.slr-systems (More info?)

 

I am new to the digital world having just got a Canon Rebel Digital (300D).
Perhaps this is a simplistic question. . . But . . . I am not getting the
file sizes that the owner's manual indicates. I have the camera set to L -
smoothed and anticipated files in the 3.2 meg. However when "explored" using
XP set up with a NTFS drive "Details" only show a file of 2.07 meg.
Responses or insight are welcomed????

Thanks
Wayne

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Anonymous   12-18-2004 at 05:05:46 PM
- 0 +

Archived from groups: rec.photo.digital.slr-systems (More info?)

 

> I am new to the digital world having just got a Canon Rebel Digital
(300D).
> Perhaps this is a simplistic question. . . But . . . I am not getting the
> file sizes that the owner's manual indicates. I have the camera set to L -
> smoothed and anticipated files in the 3.2 meg. However when "explored"
using
> XP set up with a NTFS drive "Details" only show a file of 2.07 meg.
> Responses or insight are welcomed????

Because the camera is performing JPEG compression on the image, the end
file size can vary widely with the content of the photo. The camera will
estimate larger file sizes than you'll see on average simply for the sake of
safety ("Hey, you said I could get 12 more shots, and I only got 11!" ).

I used a D300 for a day, and out of a hundred shots, the average file size
was 2.4 megs - individual sizes were as low as 1.8 or 1.9 megs, with most
being 2.1-2.5, and certain shots were as large as 4.3 megs.

steve

Reply to Anonymous
Anonymous   12-20-2004 at 01:11:02 AM
- 0 +

Archived from groups: rec.photo.digital.slr-systems (More info?)

 

"Wayne Cattanach" <cattanac@wmis.net> wrote in message
news:10s8ip0apnf32f2@corp.supernews.com...
>I am new to the digital world having just got a Canon Rebel Digital (300D).
>Perhaps this is a simplistic question. . . But . . . I am not getting the
>file sizes that the owner's manual indicates.

JPG is a compressed format, so the file size will change significantly
depending on the amount of detail in the image. An image with many unique,
non-repetitive, colors and textures will be much larger than an image with
large monotone areas.

Reply to Anonymous
jean   12-20-2004 at 06:20:55 AM
- 0 +

Archived from groups: rec.photo.digital.slr-systems (More info?)

 

Also, there is a BIG change in image size when going up in ISO settings. I
think the specs are for an average image at ISO 100.

Jean

"jfitz" <jfitz@bigfoot.com> a écrit dans le message de
news:YeidncnlBr8IhVvcRVn-gw@comcast.com...
> "Wayne Cattanach" <cattanac@wmis.net> wrote in message
> news:10s8ip0apnf32f2@corp.supernews.com...
> >I am new to the digital world having just got a Canon Rebel Digital
(300D).
> >Perhaps this is a simplistic question. . . But . . . I am not getting
the
> >file sizes that the owner's manual indicates.
>
> JPG is a compressed format, so the file size will change significantly
> depending on the amount of detail in the image. An image with many
unique,
> non-repetitive, colors and textures will be much larger than an image with
> large monotone areas.
>
>

Reply to jean
Anonymous   12-20-2004 at 11:42:22 AM
- 0 +

Archived from groups: rec.photo.digital.slr-systems (More info?)

 

On Mon, 20 Dec 2004 00:20:55 -0500, in rec.photo.digital.slr-systems "jean"
<try-to@find.it> wrote:

>Also, there is a BIG change in image size when going up in ISO settings. I
>think the specs are for an average image at ISO 100.

They will always be for the lowest ISO and will be quite conservative as
well. Imagine the furor if there were times people couldn't fit the number
of images per card as spec'd in the manuals.

If you care to experiment make a new image in your photo editor and save at
a given jpeg compression ratio. Then add noise and resave to another file
and compare file sizes. The noiser photos will not compress nearly as much.
________________________________________________________
Ed Ruf Lifetime AMA# 344007 (Usenet@EdwardG.Ruf.com)
http://EdwardGRuf.com

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