Image Size & Resolution

I just purchased a new digital photo frame. It's an 8x10" frame and has a 2048 x 1536 2K resolution. I'm processing raws from Lightroom but am a bit ignorant as to the parameters to use when exporting the images as jpegs in order to take full advantage of the frames's resolution.
Thanks in advance for your help.

When exporting, under Image Sizing, select Resize to Fit checkbox and select Long Edge from the list, then enter 2048 pixels under the listbox. Easy peasy.

ken_k wrote in post #19219627
I just purchased a new digital photo frame. It's an 8x10" frame and has a 2048 x 1536 2K resolution. I'm processing raws from Lightroom but am a bit ignorant as to the parameters to use when exporting the images as jpegs in order to take full advantage of the frames's resolution.
Thanks in advance for your help.

You will have to crop to 8 x 10 size which is a 4:3 ratio.

2048 x 1536 at 200 ppi will give 8 x 10.

You have two issues to cope with:

1. The aspect ratio of the camera's image does not match the aspect ratio of the digital frame
   
2. You do not want to send massively larger images to the screen than what its pixel matrix inherently supports
   

Thanks so much for your feedback & advice. Much appreciated.
A couple more questions if I may:

Lacogada was the only one who advised setting resolution at 200 ppi. Since this frame can display 3,143,680 pixels (2048 x1535) where does the ppi parameter enter into the equation?
Since my RAW images are high resolution I want to take maximum advantage of the display's 2K capability.

BTW one nice feature of the frame is that it will auto-rotate an image depending on the frame's orientation relative to the image's. Obviously some of the image is cropped but it still displays pretty nicely.

You don’t need to worry anything about PPI. Just crop out the 8x10 or 10x8 from your image, then resample/resize by setting the long edge to be 2048 pixels.

The reasons you would want to resize after cropping for aspect ratio are twofold. You want to send as small a file as you can for speed to transfer, lower storage etc. Also you want to be in control of the resampling method and not leave that to the frames software to do that, different methods yields different IQ final results.

I am sure LR has the ability for you to enter pixel dimensions for its cropping constraints which means you can do three things at once. Enter 2048px X 1536px in the cropping tool, and then crop what you want, you are done. Photoshop can do this so I assume LR can too. If not then you have to do the two step method, crop for 4:5 ratio, then resize to 2048 on the long end, for an exact match to the frame’s needs.

Not sure where one is getting a 4:3 aspect ratio either. 16:20, 8:10, and 4:5 are all the same aspect ratio, not 4:3.

Assuming that the photo frame automatically resizes the image to fit the frame, then all you really need to do is crop the image to 4:3 (that is the aspect ratio of the frames pixel dimensions) prior to exporting. Doing so gives you control over how the image is displayed.

TeamSpeed wrote in post #19220108
Not sure where one is getting a 4:3 aspect ratio either. 16:20, 8:10, and 4:5 are all the same aspect ratio, not 4:3.

The pixel dimensions given are a 4:3 ratio, I guess it is possible that they are non square pixels.

Canonuser123 wrote in post #19220117
The pixel dimensions given are a 4:3 ratio, I guess it is possible that they are non square pixels.

Ah, then that seems to present a problem. I would certainly hope the pixels are square in nature, else you end up with a distorted picture. So either there is a problem with the specs of the frame, there would be a black border introduced somewhere, or like you say, the pixels are rectangular (which would be the worst of all situations). I suspect this is just a 10" frame (which is how many are advertised) and isn't an 8x10 frame.

Example: https://www.amazon.com …+2k&qid=1617881​522&sr=8-6

In any case, crop for a 4:3 ratio then and resize the longest end to 2048 pixels, same recipe works here, but I would love to see what is really happening on the frame itself. I have bad memories from digital frames, because I tried them in the early years and was never happy with them. They all still seem to look like a poor quality computer display and nothing really like a photo. I wish they would have reasonably priced high resolution e-ink digital displays. This way I could send it a photo, it would look like a print, and it would take no power while displaying.

Sorry ... I stated that wrong.

The pixel dimensions you gave (2048 x 1536) are 4:3 ratio ... picture of 8" x 10" is 4:5 ratio mentioned by others.

2048 x 1536 at 200 ppi would give an approx 8 x 10 for print.
Guess that does not relate to digital pictures.

When exporting from Lr I would set the pixel dimensions for width to 2048 and height to 1536 pixels. If you have an image that matches the image ratio then those are the pixels you will get. Otherwise for other image ratios, and landscape/portrait orientations the image that is exported will have pixel sizes that will fit either the width, or height of the frame. Most digital frames are set up by default to show images at "fit to screen" so these images should display correctly on the screen. I do this a lot for exporting images for use in videos, I set the dimensions to 1920×1080 and know they will fit inside the screen.

Alan