wannabe63 Loc: Bellevue, Washington

Having recently returned from a 3 week trip with thousands of photos, I want to organize the keepers in a slide show in chronological order. Normally that wouldn't be a problem, using 1 camera, except that I had 2 cameras, D750's, and used 3 SD cards. Being technology challenged in PP, what do I have to do to be able to place the photos in the order I wish them to be viewed? I only use LR 6.14 and shoot in raw.

CHG_CANON Loc: the Windy City

First, in the LR catalog, sort the images by capture time. Hopefully, you had the clocks on both cameras in sync, so they both had the same time & date.

Depending on how you create your slide show, you may need to export into a merged and sequential order. As long as they're sorted in the proper order when you multi-select the images being exported, they'll be in the correct order. Then, just rename the files into a common naming with a sequence number / counter, like: file001, file002, file003 and so forth.

Quixdraw Loc: x

What is really interesting is when two cameras cross number sequences. I store largely by date and have it set up so I get a file for each camera. When it first happened, bizarre!

CHG_CANON Loc: the Windy City

Look at your file naming options for each of your cameras. Any that can be adjusted, give that camera a unique prefix across your portfolio.

Quixdraw Loc: x

Thank You, appreciate your expertise! You would be horrified by my "system", but I can mostly find what I need.

wannabe63 Loc: Bellevue, Washington

Thank you. I think I understand and will give it a try.

CHG_CANON Loc: the Windy City

Keep asking questions, if / as needed, on specific steps.

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

There is another approach, that will allow you to reset the capture time, especially if your cameras are not perfectly in sync - edit the metadata.

Rather than go into a lengthy explanation, here is a video that explains how this works.

https://www.youtube.com/watch?v=gOH8UCWEKFM

Renaming files on export for your purposes can work as well, but only if the cameras have the same time. And it does not fix the incorrect capture time.

mvetrano2 Loc: Commack, NY

Wow, very interesting approach.

ezslides

On a Mac, try using ShootShifter.

Morning Star Loc: West coast, North of the 49th N.

When our son got married in 2011 there were at least 5 or 6 people shooting photos. It was an outdoor wedding and no lack of space, so no problems with photographers being in each other's way.
I had asked for copies of their photos, because I had promised to make a photobook for them.
Unfortunately for me, I only asked after all the photos were taken, and no two cameras were synchronised for time.
One of them had brought a laptop and was able to copy all the photos onto a DVD for me! Each set in a separate folder. When I went through them to remove the ones I didn't want to use for the photobook, and was wondering how I was ever going to get the photos in chronological order for the book.
It proved to be quite easy, although a fair bit of work!
There were a couple of moments where everyone had taken a photo at about the same time: When he put the ring on her finger, and right after the minister said "you may kiss your bride!"
It was easy to figure out the cameratime difference between the sets with the help of these two sets of shots.
I used the time of my own camera as a starting point, as that morning I had set the camera time to the large clock in the hotel's entrance hall. From the photos taken of the ring-moment, and the kiss, it was easy to figure out the time difference between the cameras. Took a lot of math, but I managed to do them all in an afternoon.
The book I made for them, now 11 years ago, is still on their coffee table, and looking rather dog-eared!
So, if you have to combine photos from different cameras, just look for photos that were taken at (almost) the same moment by each camera, and do the math from there. The extra work of calculating minutes and seconds will be well worth it to get the photos in the correct order!

PS - I use PSE, not PS or Lightroom.

CHG_CANON Loc: the Windy City

Our OP is using Adobe Lightroom. After sorting by capture time of each individual image inside LR, specific images or groups can be multi-selected and updated for their date / time within the LR catalog, if needed to achieve a desired time-based sort order. Other free options exist to update the EXIF data within the original file, then just refresh that EXIF inside LR to achieve the desired time-based sort.

greenwork Loc: Southwest Florida

Thanks! I had no idea how to make that adjustment.

JimRPhoto Loc: Raleigh NC

Presuming the time and date settings in the cameras were consistent with each other, I do this all the time. Once you put the photo files into folders on your computer, just go to the view tab, click on “details” and then in the list format (without thumbnails) sort by date. Either ascending or descending. Then, you can go back to view tab and pick large icons, medium, etc. Once you do this, your thumbnail icons will show up in date and time sequence, regardless of the camera or file number. Hope this helps. JimR.

Dikdik Loc: Winnipeg, Canada

I've been logging my photos in for the last 20 years under the year, eg. 2022 and then by month 01-Jan, 02-Feb, 03-Mar, etc. and have created a directory template with the year and 12 months in it. I copy the template and rename the year to the current year. I have directories up to 2025, I think... but just store the pictures in the proper time. With the month sub-directories, I include 'events' for the pictures.