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Shelyak C/CS Adapter Ring (5mm Spacer)

Shelyak C/CS Adapter Ring (5mm Spacer)

par Shelyak
UGC SHK-BA0036
CA$56.00 - CA$56.00
CA$56.00
CA$56.00 - CA$56.00
CA$56.00
Égalisation de prix!
  • Provides 5mm of critical spacing
  • Adapts C-mount lenses for use on CS-mount cameras
  • Standard C-mount (male) to CS-mount (female) threads
  • Precision-machined metal construction for secure connection
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  • Description
  • FAQ
  • In the Box

  • C/CS Adapter Ring (5mm Spacer)

    This C/CS adapter ring provides the essential 5mm of spacing required to achieve perfect focus when using standard C-mount lenses on cameras with a CS-mount. Many modern astronomical guide cameras and planetary imagers use the CS-mount standard, which has a shorter flange-to-sensor distance than the C-mount standard common on security and industrial lenses.

    Bridge the 5mm Back Focus Gap for C-Mount Lenses

    C-mount lenses are designed to focus at a point farther away from the sensor than a native CS-mount camera can accommodate. Without correction, a C-mount lens will be unable to reach infinity focus on a CS-mount camera. This adapter ring acts as a simple, rigid 5mm extension that precisely bridges this mechanical gap, restoring the correct back focus.

    Installation is straightforward: simply thread the adapter onto your CS-mount camera body, and then thread your C-mount lens into the adapter. It's a fundamental accessory for anyone repurposing C-mount optics for astronomical imaging and is often paired with a T-mount to C-mount ring for connecting to a telescope's optical train.

  • What is this C/CS adapter ring used for?

    This is a 5mm spacer designed to let you use a C-mount lens on a CS-mount camera. It adds the necessary distance between the lens and the camera sensor to allow the lens to achieve proper focus, especially at infinity.

    Why do I need a 5mm spacer for a C-mount lens on my CS-mount camera?

    The C-mount and CS-mount standards have different back focus requirements—the required distance from the lens mounting flange to the sensor plane. C-mount lenses require a longer distance. This 5mm ring provides that exact amount of extra spacing needed for a C-mount lens to work correctly on a CS-mount body.

    Can I use this C/CS adapter ring to put a CS-mount lens on a C-mount camera?

    No, this adapter will not work for that purpose. A CS-mount lens needs to be closer to a C-mount sensor, but this adapter only adds distance. Attempting to use a CS-mount lens on a C-mount camera, even without an adapter, will typically result in an inability to reach focus.

    Will this 5mm C/CS adapter ring work with my ZWO ASI120MM Mini guide camera?

    Yes. The ZWO ASI120MM Mini, like many popular guide cameras, has a CS-mount. If you want to use a C-mount guide lens with it, you will need this 5mm C/CS adapter ring to achieve focus. This applies to most cameras that ship with a CS-mount as their primary interface.

    What happens if I don't use this C/CS adapter ring with my C-mount security lens?

    Without this 5mm adapter, your C-mount security or industrial lens will not be able to focus on a CS-mount camera. The image will be blurry because the lens cannot be moved far enough away from the sensor to form a sharp image. This ring is the essential component to make that combination work.

    How does this C/CS adapter ring work with a T-mount adapter?

    It's common to use a T-to-C-mount adapter to connect a CS-mount camera to a telescope focuser or other T-threaded accessory. In this setup, the 5mm C/CS ring would typically be threaded onto the camera first, followed by the T-to-C-mount adapter, ensuring all spacing requirements are met.

    • C/CS Adapter Ring

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