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Starlight Xpress Trius SX-35C Colour CCD Camera

Starlight Xpress Trius SX-35C Colour CCD Camera
Trius rear USB Guider accessory ports
Product Code
Starlight Xpress

The Trius SX-35 is Monochrome CCD camera with a huge 36.3.4 x 24.2mm Kodak KAI11002M full frame sensor and 10.8mp resolution. This large sensor makes full use of the large image circle of about 44mm offered by larger sized reflectors and refractor telescopes with field flatteners.

Get in touch for special price when purchased with an Altair Astro telescope.

The large 9 micron pixels make the Trius SX-35C CCD camera very sensitive and best suited to telescopes with larger image circles from about 800mm focal length onwards, such as the Wave Series 115mm APO refractor, and the Wave Series 130mm. We recommend using the Altair Astro Planostar field flatteners with this camera due to the large sensor size.

The Trius SX-35 will of course perform very well with Altair Ritchey Cretiens from 10" to 16" due to the larger airy discs at these longer focal lengths.

In fact, we recommend the SX-35 in particular with Altair 10" to 12" or larger Ritchey Chretien telescopes, which were pretty much designed with a camera like this in mind.

Altair tip: We often get asked what the difference is between the 35-C and 36-C cameras and which telescopes suit these cameras because they have the same frame dimensions yet different sensor specifications. Basically it's resolution and pixel size that's the most obvious difference between the two cameras (the sensor size is the same). In particular it's the pixel size which is more of a consideration when it comes to matching camera to telescope. We recommend the 35C with 9 micron pixels for telescopes with large image circles such as a Ritchey Chretien of 8-16", or a larger aperture refractor like the Altair Wave Series 115mm APO or even better, the Wave Series 130mm. We recommend the M36 (with 7.4 microns) for telescopes with a large image circle and slightly shorter focal length than 800mm, down to about 650mm. Note: These are just general suggestions based on the pixel sampling rate vs. focal length of the telescope which determines the size of the Airy Disc compared to the pixel dimensions...!

Trius Highlights:

  • Back focal length only 17mm +/-1mm.
  • The CCD sensor can be adjusted in tilt from the front of the camera.
  • High speed USB 2.0 interface for approx. 3.5 second downloads at full resolution (somewhat computer dependent).
  • Built-in autoguider interface and output - compatible with our optional dedicated external guide cameras.
  • 3x powered USB ports for guider and filter wheel control
  • Single USB cable control for all features for less cables in use overall


Major features:

  • Major features:
  • Large, high resolution Kodak CCD chip, with 10,838,016 x 9uM square pixels in a 36.3 x 24.2mm array.
  • Low dark signal - Dark frames not necessary for most of the brighter deep sky objects.
  • Anti-blooming with minimal effect on linearity and no lost active area.
  • Built-in super high speed USB 2.0 interface for approx. 7 second downloads.
  • High sensitivity, approx. 52% QE at peak (green light), 31% at H alpha.
  • Back focal distance 17mm +/-1mm.
  • Built-in autoguider interface and output - compatible with the optional dedicated external guide camera
  • Built-in dual serial ports for accessory control - directly drive filter wheels, GOTO 'scopes etc.
  • Single USB cable control for all features - get rid of that dangerous cable tangle!
  • Only ONE computer needed to control all of the devices and functions
  • Very low power consumption. Less than 1.0 amps at 12v DC - 12VA at 110v or 240v AC
  • Compact and lightweight - only 118mm in diameter x 102mm long - less than 1100 grams load on the telescope.
  • 72 x 1mm input thread, compatible with Takahashi and Starlight Feathertouch focusers, etc.
Trius SX-35 Camera Detailed specifications:
  • CCD type: Kodak KAI11002M interline CCD with low dark current and vertical anti-blooming.
  • CCD Full resolution Pixel data: Pixel size: 9uM x 9uM, Image format: 4032 x 2688 pixels
  • CCD Image area: 36.3mm (Horizontal) x 24.2mm (Vertical).
  • CCD quality: Grade 2 as standard.
  • Spectral Response: QE max at 540nM (~52%), 30% at 400nM and 660nM.
  • Readout Noise: Less than 15 electrons RMS - typically only 12 electrons.
  • Full-well capacity: Greater than 50,000 e- (unbinned)
  • Anti-blooming: Overload margin greater than 1000x.
  • Dark current: Dark frame saturation time greater than 10 hours. Less than 0.08 electrons/second @ + 10C ambient.
  • Data format: 16 bits.
  • System gain: 0.9 electrons per ADU
  • Computer Interface: Built-in USB 2.0 compatible interface.
  • Image download time: Typically 7 seconds at full resolution using USB 2.0.
  • Power requirements: 115VAC / 240VAC @ 12VA, or 12VDC @ 750mA max.
  • Cooling system: Regulated constant current cooling supply with two stage thermoelectric cooler to give a CCD temperature of approximately -40C below ambient.
  • Size: 98 x 100mm black anodised aluminium barrel with 72 x 1mm thread at the CCD window end & input/output plugs at rear. CCD alignment screws are provided for setting the chip parallel to the focal plane.
  • Weight: approx. 1100g.
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