topic Re: settings - 300 dpi in EOS DSLR & Mirrorless Cameras

settings - 300 dpi

lizpomeroy — Sun, 05 Oct 2014 15:27:30 GMT

How do I change settings on my EOS Rebel T1i so that my photos are 300dpi? Most that I have taken are coming out 72 dpi

Re: settings - 300 dpi

jrhoffman75 — Mon, 06 Oct 2014 02:47:46 GMT

What software are you using to print your files? That's where the ppi is set.

Re: settings - 300 dpi

ebiggs1 — Mon, 06 Oct 2014 13:55:12 GMT

DPI is meaningless in shooting digital images. What is important is the total resolution:

In your case, 4272 x 2848, give or take.

Re: settings - 300 dpi

barthjan — Mon, 15 Feb 2016 19:32:57 GMT

I have a t3i and a t5 I also was wondering how to change n order to shoot at 250-300 dpi

Re: settings - 300 dpi

jrhoffman75 — Tue, 16 Feb 2016 00:52:35 GMT

You can't, because as stated above dpi is related to printing, not digital capture.

Re: settings - 300 dpi

barthjan — Tue, 16 Feb 2016 12:49:06 GMT

John thanks for answering my question even though it was a repeat.

Re: settings - 300 dpi

Waddizzle — Tue, 16 Feb 2016 20:51:38 GMT

Canon's Digital Photo Professional has a setting that seems to do what you want. Use "Batch Process".

There is an output setting there, but I have never used it

Re: settings - 300 dpi

ebiggs1 — Tue, 16 Feb 2016 22:07:30 GMT

The question was, "How do I change settings on my EOS Rebel T1i so that my photos are 300dpi?"

What you displayed is "print settings". There is no 300 dpi in the camera. Print settings are entirely a different thing.

The top red circle deals with the image size. The bottom blue circle deals with print size. Two different quanties. DPI can only be set as an output from an editor.

Re: settings - 300 dpi

Waddizzle — Wed, 17 Feb 2016 02:13:27 GMT

As far as the computer software is concerned, generating a JPEG from a CR2 file is a print function.

As a matter of fact, in most computer languages the command to generate the the JPEG is "Print". As far as the program code is concerned, the only difference between printing to a formatted file, or a formatted hardware device is the "print driver' that is specified to perform the print operation.

Maybe I did read the question too quickly, but I also suspect the it is likely OP had a high degree of uncertainty as to how to phrase and ask the question. Most people do not know how to ask technical questions because they do not speak the language, if you will.

Yes, the OP said< "How do I change the settings on my EOS Rebel T1i..." The question makes the assumption that the solution is a setting that needs to be changed in the camera. The solution is not a camera setting change.

Re: settings - 300 dpi

ebiggs1 — Wed, 17 Feb 2016 15:04:19 GMT

I think you are confused a bit.

The resolution of a RAW file and a JPEG is identical unless you scale it up or down. Processing a RAW file does not affect its resolution. There is no DPI involved. If you save it as TIFF, you can get the same color-depth too. If you save it as JPEG, then the bit-depth reduces to 8-bit per channel.

A digital image is composed of pixels. Each pixel represents one colored dot. Millions of pixels make an image. The term resolution is frequently used to describe the number of dots that make up that image. Photoshop calls it the image size because it uses the term resolution to describe it. But resolution does not describe the physical size of an image because the size of each pixel is not known, just how many there are.

Thet digital cameras produce images of a given number of pixels, but what is the resolution of the camera's image? The real answer is that it depends on the viewing or the printing size. Software cannot tell what the true DPI of an image is without additional input from you. This is where software like Photoshop confuses folks. Photoshop assumes a DPI until correctly input by the photographer. To do that you access the resizing box or tab, and change the DPI. Now with the resample option unselected Photoshop knows that it must not change the image's pixels in any way. It simply sets the DPI. Once the DPI of an image is set, the software knows its intended physical size. Photoshop can figure out the correct DPI by asking the person for a physical size.

Any number of images sizes can be selected and Photoshop figures out what DPI is required. Remember that physical size, image size and image resolution are related, so if any two are known, the third one can be figuered out.

Once an image's DPI is selected, it can be printed easily to a specific size.

To further this discussion, where do you find DPI in Photoshop? If you notice the example I displayed says PPI or Pixels Per Inch. Not DPI or dots per inch. Which is undersdtandable as DPI is a PRINTING term and not a digital image term.

Re: settings - 300 dpi

ebiggs1 — Wed, 17 Feb 2016 16:40:53 GMT

I just pulled up DPP4 and see it has a box for DPI. But what it really means is PPI. This is one way this whole topic has become so confusing for so many.

DPI actually refers to printer dots per inch. When used in Photoshop or DPP 4, it means PPI, which are pixels per inch. DPI and PPI are two different things, yet often DPI is used when it should say PPI. PPI is a measure of how an image is printed to paper. Some programs call PPI a measure of "resolution" which leads to even more confusion since it is only the resolution of the printed output, not the "resolution" of the digital image.

If the pixels of an image do not change, then it has the same digital resolution no matter what number is parked in that DPI/PPI box.

More confusion is done by the fact that the PPI setting can be used to determine the print size. But a digital photo's resolution are its pixels and if those don't change, the photo remains the same resolution.

Re: settings - 300 dpi

Waddizzle — Sat, 20 Feb 2016 01:04:55 GMT

@ebiggs1 wrote:
I just pulled up DPP4 and see it has a box for DPI. But what it really means is PPI. This is one way this whole topic has become so confusing for so many.

DPI actually refers to printer dots per inch. When used in Photoshop or DPP 4, it means PPI, which are pixels per inch. DPI and PPI are two different things, yet often DPI is used when it should say PPI. PPI is a measure of how an image is printed to paper. Some programs call PPI a measure of "resolution" which leads to even more confusion since it is only the resolution of the printed output, not the "resolution" of the digital image.

If the pixels of an image do not change, then it has the same digital resolution no matter what number is parked in that DPI/PPI box.
More confusion is done by the fact that the PPI setting can be used to determine the print size. But a digital photo's resolution are its pixels and if those don't change, the photo remains the same resolution.

I agree with the bold type. Do you realize that you just agreed with what I posted earlier?

That being from the software's perspective, it does not make any difference whether or not it is printing to a disk file or hardware device. The source software does not care, it is blind to the details of the differences, which is the POINT of the driver software. The software will work the same way, whether it is writing to a JPEG, TIFF, or a GIF. The driver handles the micro-management details to the extent, that it becomes a don't care condition.

Let me put it another way. What is the difference between measuring speed in meters per second, or feet per second? As far as the formulas are concerned that use the measurements.....nothing. They are virtually interchangeable, just as the driver software called by DPP, Photoshop, or whatever, to perform the actual "printing" are virtually interchangeable.

Re: settings - 300 dpi

ebiggs1 — Sat, 20 Feb 2016 15:04:10 GMT

You are about as confusing, or confused, as Mr. Martin is. So I really don't understand what you are trying to get across now.

But there are no dots-per-inch until a print driver gets the file. Saving a jpg is not printing a jpg no matter what your software calls it.

Re-read this carefully, "Some programs call PPI a measure of "resolution" which leads to even more confusion since it is only the resolution of the printed output, not the "resolution" of the digital image."

I am sorry but I can not make it any clearer or plainer.

Re: settings - 300 dpi

ebiggs1 — Sat, 20 Feb 2016 15:13:33 GMT

If we were face to face and discussing this I am sure we would likely resolve the disparity of our thoughts. But replying to posts depends on grammatical skills which I do not possess the best of.

Re: settings - 300 dpi

Waddizzle — Sat, 20 Feb 2016 16:21:22 GMT

"Saving a jpg is not printing a jpg no matter what your software calls it."

When I have been using the word "software", I have been referring to source code, not an application. From a code perspective, generatig a file of type JPEG to save on a disc is identical to generating a file of type PCL to send to a printer.

No diference. They are both "Print" commands, the same command, in fact. Providing the command with different operating parameters changes the file type and the file destination.. In fact, generating an image on your computer monitor is a "Print" command, too!

But, I will agree to let it rest. I know how difficult it is to look at something familiar from a different point of view.. I have been writing software for decades, and some of the changes that have taken place over the years have taken me time

Stay healthy!

Re: settings - 300 dpi

ebiggs1 — Sun, 21 Feb 2016 09:16:21 GMT

"They are both "Print" commands, ..."

Like I said you or your software can call it whatever you like, it is not the same. Just because software displays some verbiage does not make it a fact. The person writing the software may not understand the correct terminology. Perhaps that is what causes most of the confusion on this topic. But you can Google it and get any amount of sources that explain it correctly.

Re: settings - 300 dpi

--confused-- — Wed, 12 Jul 2017 16:04:54 GMT

I have a T5i. I am looking to enter a photo contest. They are requiring me to send them a high res photo (which they say is 300 DPI) How do I take that picture?

Re: settings - 300 dpi

jrhoffman75 — Wed, 12 Jul 2017 16:58:05 GMT

You just take the photo. Shoot RAW for the best quality image for editing. After the image is edited in your software you would export the image. There should be a setting in your software to set the DPI/PPI.

If you post the name of software you are using we can give more specific help.