TiFF or SHQ?

Hello,

I'm wondering what is the difference between TIFF and SHQ modes on the Uzi?They both have the same resolution yet I can fit only 22 TIFF's on a 128 card but can fit 90 in SHQ mode.If the resolution is the same then what causes the larger file size and which is the better format to use?Thanks
--
Scott H
C-2100UZ

The other day I did a few experiments on this, comparing TIFF, SHQ and HQ using a C700. By zooming up until pixels could be seen, I could see blocks of similair colour created by the excessive compression of HQ, but could not pick the difference between SHQ and TIFF.

So my conclusion is to keep using SHQ for quality and efficiency of file size.

Brian

Tiff files are uncompressed files and have information from every (1600 X 1200 = 1920000 pixels) pixel in your image.

HQ, SHQ are JPEG files and are compressed. Taking several like pixels in a group and combining the info together they can greatly reduce the file size. The more the compression the more detail that is lost. Like you have already discovered, there is little difference in SHQ and Tiff on your computer and on a print of 8X10 or less. Most of us shoot at SHQ. The only instance I would shoot TIFF files is if I knew I was shooting for publication.

Scott H said:

Hello,
I'm wondering what is the difference between TIFF and SHQ modes on
the Uzi?They both have the same resolution yet I can fit only 22
TIFF's on a 128 card but can fit 90 in SHQ mode.If the resolution
is the same then what causes the larger file size and which is the
better format to use?Thanks
--
Scott H
C-2100UZ

Click to expand...

--
http://www.pbase.com/delbert
Delbert...just hangin around
C-2100, C-3000, D520

My problem in shooting SHQ is that I know I'll be opening up the picture in Photoshop to edit it, then saving it again. In got the 5050 and G2. I shoot in RAW format, export to Tif on the computer, make my adjustments, then save to low compression (4:1) JPG.

Delbert said:

Scott H said:

Hello,
I'm wondering what is the difference between TIFF and SHQ modes on
the Uzi?They both have the same resolution yet I can fit only 22
TIFF's on a 128 card but can fit 90 in SHQ mode.If the resolution
is the same then what causes the larger file size and which is the
better format to use?Thanks
--
Scott H
C-2100UZ

Click to expand...

--
http://www.pbase.com/delbert
Delbert...just hangin around
C-2100, C-3000, D520

Click to expand...

Practically speaking, go for the SHQ. I would never use TIFF except for a really special shot on a rare occasion.

My response to the concern expressed by brianric would be, nevertheless, to shoot in SHQ, open the file for editing but save the results of the editing in TIF for either further editing or printing and to save a copy in JPEG for viewing on monitor (web site, e-mail, etc.). If upon FIRST viewing from the camera one cannot see a difference between TIF and SHQ JPEG why not use the latter to optimize use of the camera's memory card? That said, for some special uses (and if the camera does not have a RAW format) TIF may be desireable despite the unwieldy file size generated.

brianric said:

My problem in shooting SHQ is that I know I'll be opening up the
picture in Photoshop to edit it, then saving it again. In got the
5050 and G2. I shoot in RAW format, export to Tif on the computer,
make my adjustments, then save to low compression (4:1) JPG.

Click to expand...

--
Garry

Garry's Page: http://www3.mb.sympatico.ca/~gschaef

RAW has an advantage, with proper software on the PC, to readjust sharpness, contrast and saturation levels that were originally shot by the camera. I'm not concerned about the memory card as I got one 128 MB SM card, and two 256 MB, one 192 MB, and one 128 MB Compact Flash card. The only drawback shooting RAW is longer write times, putting a bigger drain on the batteries.

Garry Schaefer said:

brianric said:

My problem in shooting SHQ is that I know I'll be opening up the
picture in Photoshop to edit it, then saving it again. In got the
5050 and G2. I shoot in RAW format, export to Tif on the computer,
make my adjustments, then save to low compression (4:1) JPG.

Click to expand...

--
Garry

Garry's Page: http://www3.mb.sympatico.ca/~gschaef

Click to expand...

Something else I forgot to mention. I send my files out for processing. Most require JPG format. I have no problem with SHQ. The problem I have is taking a SHQ file, modifying in say Photoshop, then saving again in JPG. Rather go from RAW, to Tif, modify, then save to JPG.

Garry Schaefer said:

brianric said:

My problem in shooting SHQ is that I know I'll be opening up the
picture in Photoshop to edit it, then saving it again. In got the
5050 and G2. I shoot in RAW format, export to Tif on the computer,
make my adjustments, then save to low compression (4:1) JPG.

Click to expand...

--
Garry

Garry's Page: http://www3.mb.sympatico.ca/~gschaef

Click to expand...

Soryy, brianric, I did't read your original post with sufficient care. I had incorrectly assumed that you were shooting in TIF when you had clearly stated that you were shooting in RAW. RAW certainly has its advantages. Your workflow seems eminently suitable.

brianric said:

Something else I forgot to mention. I send my files out for
processing. Most require JPG format. I have no problem with SHQ.
The problem I have is taking a SHQ file, modifying in say
Photoshop, then saving again in JPG. Rather go from RAW, to Tif,
modify, then save to JPG.

Click to expand...

--
Garry

Garry's Page: http://www3.mb.sympatico.ca/~gschaef