Adding A New Camera:
In order to create a page for a new camera, visit the Template:Boilerplates article and follow the directions for the appropriate camera type. If the type of camera you wish to add is not part of that page then you can use one of the existing ones and, with a greater amount of editing, make it work.
Adding A Review:
It is preferable that personal opinions and editorial comments be left off of pages describing software programs and hardware. If you wish to share your experiences (praises or criticisms) then a link should be created at the bottom of the item’s page (one can be added, if not there, by appending the line:
Visit the [[Review:ITEM_NAME]] page to read/post comments on this item.
and such commentary can be placed on that review page.