I rolled out another new Spree Extension this week, spree_product_zoom. This extension adds lightbox zoom functionality for product images with fancyBox.
As always, installation is quite simple. Add the following to your Gemfile and run bundle install.
gem "spree_product_zoom", :git => "git://github.com/spree/spree_product_zoom.git"
rails g spree_product_zoom:install
I hope that this extension is useful. For more details, give the Github Repo a visit.