What kind of events can I capture with the ZWO 2.1mm 150° lens?
The ultra-wide 150° field of view is ideal for capturing large-scale celestial phenomena. You can record entire meteor showers like the Perseids or Geminids, track the paths of bright fireballs, monitor for transient events like aurora, or simply create time-lapses of the Milky Way rising and setting.
Which ZWO cameras work best with this 2.1mm lens?
This lens is designed for cameras with a 1/3" sensor. The most common and recommended pairings are the ZWO ASI120 series (both monochrome and color) and the ASI224MC. Using it on a larger sensor will result in heavy vignetting and an incomplete image circle.
How do I focus the ZWO 2.1mm all-sky lens?
Focus is achieved manually by turning the lens barrel. For astronomical use, it's best to focus at night on a bright star. Once sharp focus is achieved across the field, you can use the locking screw on the lens to fix its position for long-term, unattended operation.
Do I need a tracking mount to use the ZWO 2.1mm lens?
No, a tracking mount is not necessary. In fact, this lens is designed for static use on a fixed tripod. The 150° field of view is so wide that stars will take hours to drift across the frame, which is perfect for creating all-sky time-lapses and monitoring the sky from a fixed position.
Will I need any filters with the ZWO 2.1mm lens for meteor observation?
For most all-sky applications like meteor showers (e.g., the Orionids), you do not need any filters. You want to capture as much light as possible. If you are in a light-polluted area, a simple IR-cut filter might help improve contrast slightly, especially with a color camera like the ASI224MC, but it is not a requirement.
What adapter do I need to connect the ZWO 2.1mm lens to my camera?
This is a CS-mount lens. It will screw directly into a camera that has female CS-mount threads. If your camera has C-mount threads, you will need a C-to-CS adapter ring (typically 5mm thick). Most ZWO cameras that this lens is designed for, like the ASI120, come with the necessary adapters, but the lens itself does not include one.
