Uploading images to the website media libraries is a straightforward task and does not require any specialist skills.
A neat feature of Sitefinity is that larger images (say camera photos) are automatically re-sized and compressed, this has major benefits in terms of performance on your website.
Another key feature is the thumbnail generator which automatically creates thumbnails in your preferred sizes when an image is uploaded. This can have major benefits especially in eCommerce where multiple thumbnails are being displayed for product lists.
Images can be adjusted directly within the website with simple to use tools such as crop, re-size and rotate.
Search Engine Optimisation (SEO) is well catered for; titles, alternate text and URLs can be easily specified for each image.