Rise carousel block - dealing with imagescaption

Hi, I have had a search and haven't found an easy solution to what I'm trying to do.

Let's say you quickly pull together a bunch of images in a carousel - often the images are different sizes and aspect ratios.

It would be nice if the image would maintain it's original aspect ratio but would appear within the constraints of the carousel rather than expanding the carousel to fit the image. This way you'll always be able to see the image caption without needing to scroll down. 

(The workaround is to manually edit the aspect ratio/size of all the images to something consistent before uploading of course, but this takes time and I'm looking for a short-cut!)

See attachment for an example of the problem.