Can I replace the objective lens in my Night Owl monocular (binoculars) with stronger ones?
You may purchase the NOLD20 (Lens Doubler) as an accessory for some Night Owl devices. The NOLD20 mounts in front of your existing 42mm objective lens increasing the magnification from 3.1x to 5x. The NOLD20 is for use with the following Night Owl Devices: NOCC3, NOLT3, NODS3, NOCX3, NOCX3T, NOCX3M, NONO3, NONO3Y and the NOCB4 (which requires two Lens Doublers, one for each lens).