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Moravian Instruments G3-16200 Mk I Mono Class 2 CCD

Moravian Instruments G3-16200 Mk I Mono Class 2 CCD

can be shipped within 30 days

Price includes VAT, plus delivery

The Moravian Instruments G3-16200 Monochrome CCD Camera uses a new semi-large format low noise, high quantum efficiency KAF-16200 Class 2 CCD Sensor.

The Class 2 sensor differs from a Class 1 in that up to 15 column defects are allowed on the sensor. However there must be a space of at least 4 zero defect columns between. In normal use the slight variations in column brightness etc is not readily noticable and can be compensated for during processing if present. Most CCD cameras supplied all use Class 2 sensors, Class 1 being normally reserved for Scientific Applications. Of course Class 2 has one significant benefit which is the considerable reduction in price compared to a Class 1 sensor!

While other astronomical cameras use CCD chips primarily designed for different application fields, KAF-16200 had “astronomy imaging” stated as the primary application during its development. Sensor dimensions 27.2 × 21.8 mm (35 mm diagonal) are designed for 2" focusers and correctors, often using M42 or M48 threads. Sensor aspect ratio 5:4 which is very close to square. This is an optimal fit for an aberration-free circle within the field of view, but also large enough to allow the best composition of the image. The sensor is small enough to be used with 2" filters (or unmounted D50mm filters), which are more common and affordable compared to square 50 × 50mm filters. Also more filters can fit into the same filter wheel and the G3 design allows usage of an internal filter wheel. 6 × 6μm pixels perfectly correspond to the typical focal lengths of amateur telescopes (between 50 and 150cm). Smaller pixels limit dynamic range and sensitivity at no added value, because resolution is limited by seeing (air turbulences) and optics, rather than by pixel size. At the same time greater pixels could provide under-sampled images if optics is good and the mount perfectly tracks the stars and seeing is above average.

Read noise around 10e-RMS is well beyond the sky background noise in the case of long exposures, even if the very best narrow-band filters are used (no to mention standard RGB filters). Dark current below 0.1 e-/s/px at 0 °C allows very long exposures, providing the sensor is used in a camera allowing for proper cooling (like the G3-16200). Quantum efficiency reaching 60% surpasses the QE of very popular KAF-8300 CCD and is almost identical to the KAF-16803.

The G3 camera is an excellent camera chassis with very low noise electronics that allow the full performance of the sensor to be realised. The cooling performance of the standard version is 50°C below ambient ensuring very low dark current. An enhanced version of this camera is available, as is a version with internal filter wheel and a version using the Class 2 sensor


Sensor - Kodak KAF16200 Monochrome CCD, Class 2

Resolution - 4540 x 3640 pixels

Full Well Capacity: appr 41,000 e-

Pixel Size: 6 x 6 µm

Size of imaging area: 27.2 mm (H) x 21.8 mm (V)

Interface: USB 2.0 (USB 1.1 compatible)

Cooling: Two-stage Peltier up to 48°C below ambient maximum, 45°C typical

Shipping and Packaging

G3 CCD cameras are supplied in a foam-filled, hard carrying case containing the camera body with a user chosen optional telescope adapter.

The standard 2" barrel adapter is included by default.

If ordered, the filter wheel is already mounted inside the camera head and filters are threaded into place (if ordered).

100-240 V AC input, 12 V DC output “brick” adapter with 1.8 m long power cable.

5 m long USB A-B cable for connecting camera to host PC.

CD-ROM or USB Flash Drive containing camera drivers, SIPS software package with electronic documentation and PDF version of User's Manual.

Printed copy of camera User's Manual


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