This is an example of just how useful rendering can be for purposes of not only showing a product, but advertising one. These barbells are all renders, but so is this image with the model. With product rendering, you can take photo stock, bring it into the rendering software, and then scale your product as you need in an image. In this case ARCHON barbell over the photo stock barbell. From there I would export the rendered barbell as a PSD file, overlay it onto the stock photo and from there use photoshop tools to make it appear the photo was taken with the ARCHON barbell.