ACF Image Field Shortcode
Adds an [acf_image name="hero" size="large"] shortcode that outputs a responsive image from an ACF image field, whatever return format the field uses.
Snippet Library
Custom Post Types & Fields snippets for WordPress
Snippets for custom post types, taxonomies and custom fields: register a post type, add meta boxes, show fields in lists and archives. For developers modeling content beyond posts and pages.
Minimum Image Size for an ACF Image Field
Rejects uploads to a chosen ACF image field when the picture is smaller than the width and height you need, such as for hero banners.