Back Focus is a mechanical adjustment for focusing a camera. It moves the image sensor in relationship to the lens to allow for different back focal lengths of lenses. This is important when fitting a zoom.
Everything about the order was excellent! The site worked no problem, the item was as described and the shipping was very fast. I\'m very happy with the experience and will definitely buy from you again!
Elena from Toronto, ON
Fast service-fast shipping. Have not, as yet, installed the light at our remote get-away cabin. Plan to do that this next weekend. Thank you for having just what we needed.
Pat from Heavener, OK
Thank You, Camera works well.
Alma from Idaho Falls, ID
The staff at Advance Security Products has been courteous and extremely helpful in helping me meet my camera needs.