Want to use rear LCD screen as a JPG viewer, but no luck!

[drmikeinpdx]

I want to be able to copy some JPG images onto my Compact Flash card, put it into my camera, and scroll through the images on the LCD screen, like I do with images I just shot. It seems like a simple thing, but it's not happening.

Here's what I've been doing:

I put the CF card in the card reader and use Windows Explorer to transfer some JPG files from my hard drive to the active folder on the CF card. In this case, the folder is named 100EOS7D. When I try to view the JPGs on the camera screen, they aren't there.

Just for fun I tried this with a Canon RAW file and I was able to view it on the screen. Tried again with a DNG image file and no luck.

Any ideas on how I can make this work?

Both my 5D3 and my 7D do the same thing. It seems odd, since you can save your images as JPGs and view them easily, but when you copy in a JPG from your computer, it is not recognized by the camera.

Thanks in advance!

 

[Loswr]

Have you tried it with JPGs from DPP?

 

[drmikeinpdx]

I used Zoom Browser to transfer a JPG that was created with Lightroom and that didn't work. I'll try DPP.

 

[drmikeinpdx]

OK, DPP works if I select a Canon RAW file, open it in the editor, then choose "convert and save" to the working folder on the CF card. The camera will display the image on the LCD screen. Yay!

It does not work if I import a Lightroom-created JPG into DPP, then select "convert and save" on the CF card. Darn!

Very strange!

Most of my RAW images are actually saved as DNG files, so it appears that my options for this project are very limited.

 

[Loswr]

I wonder if Canon is embedding a small JPG preview in the full JPG file (i.e., the same one as in the RAW file), whereas other converters do not?

I have some DxO-converted PowerShot S95 images that I re-copied onto an SD card for the camera (so my daughter could have the pics she'd taken on the camera before it became 'hers'. The S95 has a high-speed scroll when advancing through the images (they flip past like the album art with some iTunes views, and more recently in Finder too). The re-copied files show up as '?' thumbnails, but if you view the single image it's there, so I suspect those files lack a little embedded JPG. Likewise, that '?' image shows up on my Canon Selphy printer with DxO-converted JPGs, but the images print just fine.

 

[drmikeinpdx]

You may be right, Neuro. Perhaps the camera is looking for a thumbnail.

 

[Valvebounce]

Hi folks.
Just wondering if this could be one of the things the info file the cameras create is for? Nothing else seems to use it?

Cheers Graham.