The Nanlite FL-20G Fresnel Lens is a Bowens mount Fresnel attachment that was designed for the Forza 300 and 500 series, however, it will work on the new Forza 720 and 720B as well. Nanlite Forza 720B and FFL 20G 37 10 Just like the Aputure F10 Fresnel Attachment it allows you to turn the COB point source fixture into a Fresnel easily, and most importantly, without emptying your wallet. I have reviewed the Nanlite Forza 720B on the site, and you can see that review here. I will be comparing the Nanlite FL-20G Fresnel attachment directly against the Aputure F10 Fresnel to see what the advantages and disadvantages are when they are used on the Nanlite Forza 720/720B. Why am I doing this? Well, I found that the Aputure F10 Fresnel worked well on the Forza 720B, so I was curious to see how Nanlite’S own option compared.