Determining the best DPI to print photos at is not an easy task, especially with the constantly evolving technology. To find a definitive answer to this question, photographer Rich Seiling decided to conduct some tests. For his test prints, he used a Canon Pro 4000 printer and an image with a resolution of about 150 megapixels. He then printed the image at varying DPIs ranging from 150 to 959.556.
As expected, the higher the DPI, the sharper and more detailed the print appeared. In fact, the high DPI test prints were even sharper than any 8×10 digital prints Seiling had ever seen. To put it into perspective, these prints looked more like what you would expect from a large format print from a master photographer like Ansel Adams.
The difference in quality gained from using high DPI files is remarkable. To achieve the best results, Seiling advises changing your workflow instead of sizing your file to a standard DPI like 300 and then printing it. Instead, stop resizing the file and give the printer all the resolution you have. Depending on the size of the print you are making, this could mean giving it 450 DPI or 150 DPI. The DPI doesn’t really matter as long as you are providing the printer with all the real resolution in the file, not interpolated resolution.
By doing this, you will have the sharpest prints possible because the Canon printer knows what to do with all that information. Additionally, it makes your workflow much easier, removing any uncertainty and doubt about what DPI is the best to print at.
In conclusion, it is important to note that determining the best DPI to print photos at is not a straightforward answer. However, with the right printer and workflow, you can achieve remarkable results with high DPI prints.