I recently won a giveaway and received a Hoplite from Phokus Research Group.
As shipped from Phokus:
The concept for this, is old with NOD usage and started with Duct Tape or the included rubber storage covers for NOD’s. It allows you to be in focus with your NOD viewing from up close to infinity.
Focused at infinity:
No NOD focus device:
NOD focus device:
DARC posted a bit more on the history of this and how to make the do it yourself modes:
I’ve used the concept for a few months, in the cheaper do it yourself multipart option. The setup I was using was the Butler Creek Scope Cap drilled out in the middle in conjunction with a Wilcox Industries Protective Cover for Objective Lens (PVS-14) sacrificial lens system.
The scope caps run from $3 to $12. The Sacrificial Lens system is about $30. The setup I was running was “cheaper” up front. The disadvantage to this is that the scope cap can’t be put flush onto the NOD unit thanks to the Wilcox lens pushing out a little further out. When you open the scope cap, it wants to slide back over the Wilcox lens which won’t allow you to close it until you readjust it.
The Hoplite MSRP is $100 so there is a definite price difference. What does it offer over the do it yourself model? The Hoplite features a multi size aperture that allows you to make the whole bigger in the same way the KAC 300 meter rifle sights work with a plastic insert. The Hoplite also features a built in replaceable sacrificial lens setup. It’s secured by either friction direct onto the PVS-14, or with the rubber band seal that is included.
I’ve done some driving with this setup as well as some walking around with them and am impressed. It seems to be more reliable long term than the do it yourself mode, but not sure how much more reliable long term as I’ve only had it about a 3 weeks.
Video of the focusing in use:
What is the downside to this? You will have reduced light collection. SURPRISE! By making the light collection area smaller, less light will be collected, making it a darker image. If you are in a environment where you need more light, then you just flip the cap up or turn on IR illumination if you won't violate OPSEC.
I've passed this around to a few co-workers to play with and they have been happy with it, although they don't have as much experience under NOD's as I have been able to get.