Photoshop effect


I’d like to recreate the image here:

Does any know how the blurred edge to each image in the circle was acheived in photoshop?

Overall, I assume the image was created in Photoshop using a batch process - something like inverse circle - then cut - then the blurred edge effect.

Lastly, it it possible to mass import images into a single .psd - or can this again be acheived by batch commands?

Grateful for any suggestions