PIXMA PRO-100 Changing DPI changes print size

[pixma100]

I am trying to print photos using my Canon Pixma-100. I used to have the printer installed on a former computer, but that was years ago. This time around, I merely downloaded the current printer driver from Canon's site.

Prior to printing I am selecting (for example) a width (7.0) and and height (4.692) for the image size, which results in a PPI of 1303 in my case (I'm using GIMP to do the processing, and I am sending the print job to the Canon from there). When I print the photo at 300x300 dpi it prints very small on the paper (~3.5" x 2.25"). When I print at 600x600 dpi it seems to prints at the correct dimensions (~7" x 4.7"). When I print at 1200x1200 dpi it prints only a small portion of the image (very large), since the majority of the image would appear off of the page.

In each case, it would seem that the image should actually print at 7.0" x 4.692" since that is what I selected...yet, these different sizes are the result. It appears that the DPI setting selected in the Print option is dictating the image size, rather than the Print Size that I have selected for the file.

It might be the case that the printer driver is overriding the Print Size. When I select the printer via my Mac (System Settings-->Printers and Scanners-->Canon Pro 100 Series) there is no option anywhere to un/check a "Fit to Page" or "Scale to Fit" option, which I thought might be the issue. How can I see/change this option?

Does anyone know how I can get images to print at the size I've selected, given my current setup?

Thanks in advance for any help or ideas, I appreciate it.

[pixma100]

Thanks, everyone, for the input. 

I did speak to Canon and the Pixma helper had no solution for my issues.

I also downloaded and ran Digital Photo Professional in order to print the images (.jpg and .tif files) from there (rather than from within Gimp). DPP would not even open my images (which, by the way, I can open and print from all other software I've tried...though with the strange image resizing problem that began this fiasco).

I then spoke to Canon DPP support, who could not figure out why DPP will not open my jpg and tif files. 

Very unsatisfying so far...

[jrhoffman75]

---

@pixma100 wrote:

I am trying to print photos using my Canon Pixma-100. I used to have the printer installed on a former computer, but that was years ago. This time around, I merely downloaded the current printer driver from Canon's site.

Prior to printing I am selecting (for example) a width (7.0) and and height (4.692) for the image size, which results in a PPI of 1303 in my case (I'm using GIMP to do the processing, and I am sending the print job to the Canon from there). When I print the photo at 300x300 dpi it prints very small on the paper (~3.5" x 2.25"). When I print at 600x600 dpi it seems to prints at the correct dimensions (~7" x 4.7"). When I print at 1200x1200 dpi it prints only a small portion of the image (very large), since the majority of the image would appear off of the page.

In each case, it would seem that the image should actually print at 7.0" x 4.692" since that is what I selected...yet, these different sizes are the result. It appears that the DPI setting selected in the Print option is dictating the image size, rather than the Print Size that I have selected for the file.

It might be the case that the printer driver is overriding the Print Size. When I select the printer via my Mac (System Settings-->Printers and Scanners-->Canon Pro 100 Series) there is no option anywhere to un/check a "Fit to Page" or "Scale to Fit" option, which I thought might be the issue. How can I see/change this option?

Does anyone know how I can get images to print at the size I've selected, given my current setup?

Thanks in advance for any help or ideas, I appreciate it.

---

It has been discussed on here a while back that GIMP does some things to TIFF images that affects DPP opening them. DPP is primarily a RAW editor but will edit Canon/DPP created JPEGS and TIFFs.

I sometimes get ? on an image if it is a random image saved from the Internet.