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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Player One 2.5mm CS lens

Player One 2.5mm CS lens

par Player One
UGC POA-25LENS
$22.00 - $22.00
$22.00
$22.00 - $22.00
$22.00
Égalisation de prix!
  • 2.5mm Focal Length
  • CS-Mount Standard
  • Ultra-Wide Field of View
  • Ideal for All-Sky Cameras
En rupture temporaire
Alerte de retour en stock
Info disponibilité
Admissible à la livraison GRATUITE aux USA pour les commandes de plus de 350$.
  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • 2.5mm CS lens

    This 2.5mm CS lens is designed for a single purpose: capturing an extremely wide, horizon-to-horizon field of view. The short 2.5mm focal length is ideal for all-sky cameras, meteor detection systems, and atmospheric monitoring stations where situational awareness is more critical than high-resolution detail.

    A 2.5mm Focal Length for All-Sky Imaging

    The defining characteristic of this lens is its 2.5mm focal length, which produces a "fisheye" or near-fisheye perspective when paired with the small sensors typical of CS-mount cameras. This allows you to capture the entire visible sky in a single frame, making it a powerful tool for automated monitoring projects.

    • Meteor and Fireball Networks: Capture the full path of bright meteors against a fixed star-field background for triangulation and analysis.
    • Observatory Cloud Monitoring: Get an instant, 24/7 view of sky conditions to know when it's clear enough to open the dome.
    • Aurora and Airglow Imaging: The ultra-wide perspective is perfect for framing large-scale, dynamic atmospheric phenomena like the aurora borealis.
    • Trade-Offs: Be aware that a 2.5mm focal length prioritizes field of view over image scale. There will be significant geometric distortion toward the edges, and individual objects will be very small. This lens is for capturing context, not close-up details.

  • What is the primary application for the 2.5mm CS lens?

    The primary application is all-sky imaging. Its 2.5mm focal length is designed to capture the widest possible field of view, making it ideal for meteor cameras, observatory weather stations, and monitoring large-scale atmospheric events like the aurora.

    What kind of camera mount does the 2.5mm CS lens use?

    This lens uses the CS-mount standard. This is a common threaded mount found on many security, industrial, and specialized small-format astronomy cameras, particularly those used for guiding or planetary imaging that have been repurposed for all-sky work.

    Will I see distortion with the 2.5mm CS lens?

    Yes, significant geometric distortion is an inherent characteristic of such a short focal length lens. Stars and objects near the edge of the field will appear stretched. This is a normal trade-off for achieving an ultra-wide, "fisheye" perspective.

    Is the 2.5mm CS lens suitable for imaging planets or galaxies?

    No, this lens is not designed for high-magnification imaging. Its purpose is to provide the widest possible field of view, which means planets and galaxies would appear as unresolved points of light. For detailed imaging of celestial objects, you need a telescope with a much longer focal length.

    Can I use the 2.5mm CS lens to build a meteor camera for the Perseids?

    Absolutely. This is an ideal use case. The 2.5mm focal length will capture a massive swath of the sky, maximizing your chances of recording meteor trails during major showers like the Perseids or Geminids without needing to aim the camera precisely.

    Would this 2.5mm CS lens work for a permanent cloud monitoring station?

    Yes, it is perfectly suited for this role. Mounted in a weatherproof enclosure and connected to a small astronomy camera, the 2.5mm CS lens can provide a continuous, horizon-to-horizon view of your local sky conditions, day or night.

  • Player One 2-Year Warranty