I think it is great that you want to add this section to your site. It is definitely not an easy task to implement and maintain, but I am always enjoy it when I run across a site that can give an interesting read on product.
Regarding the page layout:
1) I don't like the FB popup. Is it telling me to just skip your site and go to FB?
2) Your page looks to be more of a hands-on/long term review of product that you bought and use (used). I think the layout should promote that from the start so people have an idea of what they are going to find.
3) The layout should be set up so it can expand over time. I expect that with each product shown on the fist page it will become too much to go through over time. I would prefer to just select the topic, such as Camera or Lens, from the list and then on the Camera page select the camera I want to read about.
4) The page for Cameras for example should have your take (Experience) on the product right at the start. I would not put down anything else. You don't need to tell people looking at a D750 that they can find the specs somewhere else, they already know that.
5) Don't link off your page unless it's making you money, as I usually don't make it back.
6) With just your Experience listed, that would allow you to put your review of all of your cameras - or lenses, etc. - on one page. It is much easier to scroll down and read all of your Experiences about cameras without jumping back and forth, usually a better option for mobile users.
7) Instead of the multiple topics selection list for one camera (Intro/Video/Specs/Exp) I would prefer the selection list would just be the camera models reviewed. I would not even show this list on the mobile version as you find it all by scrolling down.
8) All product shots, test shots should be yours, always.
9) Your Experience - I like when I find that camera setting that the early reviewers never have time to try out, something about the camera that allowed you to get the shot, what may have led to missing a shot.
10) Good luck, keep at it.