Question about image fields

Hello,

I’ve been using Pods for a few days now and am loving it.
I’m trying to understand these aspects:

I added a set of images for my product as a custom field called “other_images”. When I make a pod template using magic tags, i see a number of fields related to other_images. Some of these are:
============
other_images
other_images._src
other_images._img
other_images._src.slider-full
other_images._img.slider-full
other_images._src.slider
other_images._img.slider
other_images._src.tc-slider-small
other_images._img.tc-slider-small
==========

I’ve tried to look around the documentation but can’t figure out what these fields are? Also what is the difference between ._src and ._img tags?
Any help will be much appreciated.

Many thanks,
Apoorv