I have been receiving a considerable amount of hits regarding the JSA tour. So I would like to mention that this site shows only my opinion on travel and photography topics. If you want to know requirements regarding the JSA tour, please check out these sites http://www.jsatour.com/. This company is the one I used to book my trip last year; they are very reliable. I have shared my impressions about the JSA tour in an earlier post: JSA Tour.
I also get hits on the kind of camera that you can bring. According to tourdmz.com (http://www.tourdmz.com/english/07guid/tour1_1.php ), “You can bring your camera. However, you need to follow the instructions of your tour guide on when and where to take a photo. (No camera with zooming capacity more than 100mm are not allowed to carry to this area) “.
Before going to the tour, I was anxious about this, because I had a DSLR and wasn’t entirely sure about the restrictions. I wanted to be on the safe side, and so I didn’t bring it; I just brought my point and click. On hindsight, I should have brought my SLR — some visitors did, and they didn’t have any problems. So if I were to do it again, I’d bring mine, of course, I will comply with the 100 mm lens limit.
Again I will stress out the importance of booking the JSA tour sooner rather than later; it isn’t your regular tourist tour. Point in case jsatour.com does not make a secret about the fact that you could be subject to background checks.