Unscrew the lens to get a tighter light beam.
Screw in the lens to get a wider light beam.
You decide how you want your light to be projected.
To mount the lens, please use a adhesive similar to: Silicon lens / optic adhesive (high temperature) 45g
Please note: If being used in conjunction with the MakersLED Heatsink, the lens must be screwed all the way (widest beam) to clear the splash guard. You can also drill a 2in hole into the acrylic splash guard to fit the lens through
Installation guide: http://www.nano-reef.com/topic/331148-mounting-lens-optic-on-the-lumia-51-led/
There are 2 review(s) for Lumia optic / lens
by Gavin – 30th Oct 2013
It's a nice lens, and clearly is designed to mate perfectly with the lumia 5.1. WIth the optical silicone mounting it was very easy and I got my whole assembly done and wired in an evening.
Only snag is (as noted above) the lens is a bit tight. I didn't have to use tools on mine, but it certainly didn't move smoothly. This might be a blessing when it's above the tank, the last thing you want is to lose the lens. But for now it's a smidge irritating.
by Anand R. – 12th Sep 2013
The optics looks nice enough. Perfect for my application.
However, when it arrived, it came screwed in. The must have been a worksmanship error or something, but it was impossible to unscrew without a vise. So I had to put it in a vise in order to get it in two pieces.
When that was done, I though it would be easier to screw back in. It was not. I cleaned it up a bit with a soft cloth but it was still near impossible to screw it in more than a tiny amount by hand.
So 3.5/5 because it's extremely hard to adjust. It also got some scarring from rubbing against the vise.