topic Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default? in EOS DSLR & Mirrorless Cameras

I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

KindSoul65 — Mon, 21 Mar 2016 20:13:46 GMT

How do I set the camer to 300 DPI?

How do I set the photo that was recorded at 5184 x 3456 (L) at 300 dpi? For some reason the properties show it at 72. I need it larger for business cards asap. I use Picasa. Thanks!

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Mon, 21 Mar 2016 21:46:40 GMT

The DPI does not matter, what counts is the number of pixels. You cannot change the camera setting. I am not familiar with Picasa, but it may or may not be able to do it. The 72 or 300 dpi only matter when you try to print. If the whole image is going onto a 3.5" business card, you are fine, since you are sitting at 1500 dpi. If the printer says you need to have it set for 300 dpi, get a new printer.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

RobertTheFat — Mon, 21 Mar 2016 22:46:04 GMT

@KindSoul65 wrote:
How do I set the camer to 300 DPI?

How do I set the photo that was recorded at 5184 x 3456 (L) at 300 dpi? For some reason the properties show it at 72. I need it larger for business cards asap. I use Picasa. Thanks!

It's probably Picasa, not the camera, that's responsible for the 72 dpi setting. 72 dpi is a putative printer resolution, and the only reason a photo editor keeps track of it is to allow you to set the dinensions of the printed image in inches, rather than in pixels. So if you succeed in resetting the pixel density to 300, you can specify the image size in inches. You might need to do that if your printer is capable of more than one resolution and you're uring a print utility that conveys the resolution setting to the printer. If the printer resolution is set independently (which is common, especially if you're dealing with a printing service) and you know what that resolution is (300 dpi in your case), you can do all your computations in pixels and not worry about what the photo editor thinks.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Mon, 21 Mar 2016 22:48:14 GMT

The camera does set a 72 inch dpi - the "default screen resolution". I know, because it used to be a pain opening an image in Photoshop and having it default to a 30" poster.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

Waddizzle — Mon, 21 Mar 2016 22:59:30 GMT

I am not familiar with Picassa, either. However, if you are using a Rebel T5, then you probably have DPP 3 installed. You can use the "batch" process to output JPEG files, and specify the DPI, dots per inch, or pixels per inch, same difference.

Most "Paint" programs, or image editors, allow you to modify the dots per inch, or dots per centimeter, of an image file, too.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

cicopo — Tue, 22 Mar 2016 00:37:36 GMT

The camera DOES NOT set DPI nor can it be done in camera. DPI is DOTS PER INCH. a printer setting that can't be set in camera. You are looking at false information like thousands before you. I have used Picasa for almost 10 years & even it (or my version) has no way to pick specific DPI settings. The same applies to when you opened images in Photoshop and saw the setting as being 72 DPI, which is the old default that for some reason still is the default in many instalations. To confirm that you aren't actually going to print at 72 DPI as suggested turn your ruler on & see just how big the image would be IF you printed it at 72 DPI. Not many of us have a printer that can print that big.

IF you want you can make a business card by exporting just about any file after editing using the settings of 1600 Pixels wide & under Image Setting choose Automatic or Maximum. Those settings can easily make a high quality 4 X 6 photo using a photo quality printer.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Tue, 22 Mar 2016 14:21:57 GMT

The camera *does* puts info (specifically 72) in the horizontal and vertical resolution EXIF fields, which is measured in dpi.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

cicopo — Tue, 22 Mar 2016 16:07:56 GMT

See https://en.wikipedia.org/wiki/Dots_per_inch

You CAN NOT set DPI in camera. You are simply being fed useless info by your software program. The camera records in PIXELS.

Here is some more info. In the first link read message # 6 carefully.

http://photography-on-the.net/forum/showthread.php?t=265690

http://photography-on-the.net/forum/showthread.php?t=1132002&page=1

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

Waddizzle — Tue, 22 Mar 2016 16:26:19 GMT

"The same applies to when you opened images in Photoshop and saw the setting as being 72 DPI, which is the old default that for some reason still is the default in many instalations."

The setting of 72 DPI is a standard resolution that is used for displaying images on web pages. A row of 80 characters, displayed as an 8x8 matrix, with a pixel of space between characters consumes 720 pixels, which works out to 10 characters per inch.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Tue, 22 Mar 2016 16:51:27 GMT

Look, we agree here. I agree that you cannot *set* the dpi in the camera. But the fact is the EXIF info straight from the camera contains dpi info set to 72. Have you ever examined the EXIF straight from the camera?

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

Waddizzle — Tue, 22 Mar 2016 16:59:20 GMT

"Look, we agree here. I agree that you cannot *set* the dpi in the camera. But the fact is the EXIF info straight from the camera contains dpi info set to 72. Have you ever examined the EXIF straight from the camera?"

Who's arguing? I merely explained why 72 is used as a standard DPI for images displayed by computer monitors, and why is it's use has persisted for so many years, and years to come.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Tue, 22 Mar 2016 17:17:31 GMT

Cicopo is:

"You CAN NOT set DPI in camera. You are simply being fed useless info by your software program"

And here is the data from EXIFTool:

ExifTool Version Number         : 10.13
File Name                       : IMG_6452.jpg
Make                            : Canon
Camera Model Name               : Canon EOS DIGITAL REBEL XS
Orientation                     : Horizontal (normal)
X Resolution                    : 72
Y Resolution                    : 72
Resolution Unit                 : inches
Software                        : QuickTime 7.6.6

Strangely, my S100 sets it to 180 dpi.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

Waddizzle — Tue, 22 Mar 2016 17:25:50 GMT

"Strangely, my S100 sets it to 180 dpi."

Do you have the ability to change the setting from 180 to something different, though?

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Tue, 22 Mar 2016 17:46:43 GMT

No, you don't. Canon decides it for you.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

cicopo — Tue, 22 Mar 2016 18:06:11 GMT

I'm argueing & I'm RIGHT. Software produced your screen capture, not your camera. I don't know what software nor how to use it but that is USELESS information. The PIXEL Dimensions shown are TRUE & USEFUL information. IF you send that file to a photo grade printer it will set the DPI to it's maximum setting IF you print at a common setting (* X 10 or smaller) & then lower the DPI setting if you can print large enough. UNTIL you either crop deep into a photo OR request it be printed VERY large your printer will default to 300 DPI or greater. 300 DPI is considered the LOWEST rsetting to use for photos that will be viewed at arm's length. 72 DPI can be used for wall posters & larger, BUT unless you have the ability to print that big you will NOT be printing your full frame at 72 DPI even though you think you will.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Tue, 22 Mar 2016 18:23:30 GMT

I agree that dpi is useless. That "software"* is simply reporting the information in the image file. Are you saying that there is no dpi info in the EXIF in the image file? Because that is plainly wrong. Look for yourself.

(Just because it is useless does not mean that Canon did not put it there! So we have deal with it.)

*Actually 3 different sofware programs on two OS's: Windows Photo Viewer, Photos and the gold standard EXIFTool.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

kvbarkley — Thu, 24 Mar 2016 14:14:56 GMT

I was attending google university about this and found something interesting, which makes a lot of sense. EXIF data applies to scanned images as well as camera images. The dpi info in the file is there so the scanner can tell you how big the original was.

As we have *ahem* discussed, this information means nothing to a camera image, but rather than deleting it or setting it to a value to tell the software to ignore it - like 0 or -1 - it is to be set to 72 for cameras as a sort of default. I don't know why I have cameras that set it to 180!

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

cicopo — Thu, 24 Mar 2016 15:44:31 GMT

Until the file is sent to a printer (the machine, not a printing company) there isn't any actual DPI. It's the printing device that creates those dots and frankly as someone who has been using digital photo printers since 1998 none of them could even be set to print at such a wide dot spacing. I'd have to crop soo deep into a file to make the printer print it that poorly that I'm sure I'd get some kind of warning from my software that things weren't right. If you shop (just to see how fine modern printers actually print in DPI) you'll find the specs are huge relative to even 300 DPI, which is considered OK for a print.

Now this isn't actual DPI info but it's close enough to help understand the relationship. I used Photoshop to re set the pixel dimensions to the same size that the camera used for the screenshot produced, then changed the PIXELS per inch figure to some other numbers & you can see how that affected the size of print that would then be created at those numbers.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

cicopo — Thu, 24 Mar 2016 15:50:18 GMT

Here's a larger view of two of those.

Re: I need my photos to be 300 DPI. How do I set my Canon Rebel T5 to do that as a default?

Waddizzle — Thu, 24 Mar 2016 16:21:52 GMT

Like I said, the Batch Processing Tool in DPP 3/4 allows you to dial in whatever DPI that you want the output file to have. There is no need to use an application as fancy as Photoshop. Most Image Editors can change the DPI/PPi, too.

That is from the freeware application Paint Dot Net.