jack in oz 0 Posted March 5, 2011 Hi, I bought a Samsung SDN-500 colour day/night camera on eBay. It came with a Pentax TS4V214ED lens. Lens is CS mount, 2.8-12mm focal length, F1.4 to F360 auto iris. The camera works great and I can get the camera to focus (using the NEAR-FAR ring) at all zoom settings except full WIDE. Also, if I focus the lens at the full TELE position, then rotate the zoom ring towards WIDE, it goes out of focus, then back into focus, then WAY out of focus as I move towards full WIDE. Is this likely to be a back focus issue or is that normal for this type of lens? Jack Share this post Link to post Share on other sites
Soundy 1 Posted March 5, 2011 Just need to tweak the back-focus. Most cameras support this one way or another. From the pictures, it looks like the Samsung should do it by turning the ring between the lens and the camera body. Share this post Link to post Share on other sites
jack in oz 0 Posted March 5, 2011 Thanks Soundy, I have the camera manual and you are right, back focus is adjusted with the metal ring. I just wanted to make sure that was the problem before I started messing with it. Jack Share this post Link to post Share on other sites
