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31.75mm Eyepiece to C-mount Adjustable Telescope Adapter

31.75mm Eyepiece to C-mount Adjustable Telescope Adapter

The 31.75mm Eyepiece to C-mount Adjustable Telescope Adapter series (ATA037, ATA050, ATA075) connects a standard 31.75mm eyepiece tube to a C-mount camera for microscope or telescope imaging. Each model provides fixed magnification (0.37X, 0.50X, 0.75X) and is manually focusable with parfocal alignment to the eyepiece. Designed for use with sensors from 1/4" to 1" in size, the adapters allow direct camera integration without optical path disruption.

  • Direct C-mount camera attachment to 31.75mm eyepiece tubes without modifying the optical system
  • Fixed magnification options (0.37X, 0.50X, 0.75X) for predictable image scaling
  • Manually focusable design for fine-tuning image sharpness after camera attachment
  • Parfocal alignment ensures focus remains consistent when switching between eyepiece and camera
  • Supports a range of sensor sizes from 1/4" to 1" for compatibility with various microscope cameras
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Technical features

  • C-mount to 31.75mm eyepiece tube connection with manual focus adjustment
  • Parfocal design maintains focus position when switching between eyepiece and camera
  • Model ATA037: fits 1/4" to 1/3" sensor size, 0.37X magnification
  • Model ATA050: fits 1/2" to 2/3" sensor size, 0.50X magnification
  • Model ATA075: fits 1/1.8" to 1" sensor size, 0.75X magnification
  • Magnification is fixed; no zoom or variable adjustment
  • Sensor size must be smaller than the adapter’s maximum to avoid field cutoff

Who it is for

  • Procurement engineers sourcing microscope camera integration components
  • Laboratories upgrading analog microscopes to digital imaging workflows
  • Distributors offering camera-ready microscope accessories to end users
  • Astronomy equipment integrators building imaging systems from eyepiece-based telescopes

Specifications

ModelsATA037 / ATA050 / ATA075
Sensor Size Compatibility1/4"–1/3" (ATA037) / 1/2"–2/3" (ATA050) / 1/1.8"–1" (ATA075)
Connection TypeC-mount to 31.75mm eyepiece tube
Focus TypeManually focusable
ParfocalYes, with the eyepiece
AdjustmentManual focus ring on adapter

Use guide

  • Identify the sensor size of your microscope camera
  • Match the sensor size to the correct adapter model (ATA037, ATA050, or ATA075)
  • Attach the adapter to the 31.75mm eyepiece tube and connect the C-mount camera
  • Use the manual focus ring to adjust sharpness after camera attachment
  • Test parfocal alignment by switching between eyepiece and camera view

FAQ

What sensor sizes are supported by each adapter model?
ATA037: 1/4" to 1/3"; ATA050: 1/2" to 2/3"; ATA075: 1/1.8" to 1".
Can I use this adapter with a microscope camera that has a 1" sensor?
Yes, use the ATA075 model for full field coverage with a 1" sensor.
Is the magnification adjustable?
No, magnification is fixed at 0.37X, 0.50X, or 0.75X depending on the model.
Does it maintain focus when switching between eyepiece and camera?
Yes, the adapter is parfocal with the eyepiece, so focus remains consistent.
How do I ensure full field coverage?
The sensor size must be smaller than the adapter’s maximum supported size; our experts can help select the correct model.

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