Yes there is limitation on blogger.
But you can show up more than 50 images per page with the help of Thumbnail, just upload mini thumbnail in your blogger like this.
<a href="Filename.jpg" target="_blank"><img src="Thumbnail-Filename.jpg" alt="this is alt text" /></a>
This is your main image URL
By setting this attributes our Filename.jpg will open in new tab of browser.
Here enter your compressed images URL link in source.
So by adding this html code you will see a src images in blogger page, and whenever people click on it, then they will see a original image in new tab of browser.
Actually using this technique you can load your blogger page more quickly because it is display only src images and that is less in size. ( you can use third party tool to compress your image size, You can also use Microsoft picture manager for that)
With the help of schema you can optimize your images in best way.