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.
I really like my hidden camera pen! It works without an outside source of power and it still lasts a pretty good while. I am quite satisfied with the product. More items like it would be very good! That, I mean, is cameras which do not require an outside source to power them and also which do not require an outside source to view the videos. Hope this is helpful.
Joseph from Livermore, CA
Very easy ordering process, VERY quick shipping. Overall a surprising and fantastic purchasing experience.
Attn: from Myrtle Beach, SC
I have been a customer for many years and I will continue to be because of the quality products and great customer service.
Terry from St Louis, MO
Packaging and website is excellent
Peter from Montreal, PQ
I was in a hurry and sales person scrambled to meet UPS shipment that was going out very soon, and made it. Everything was in shipment, everything worked. I would definitely use again, and would recommend to anyone needing security products.