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Moravian Instruments C1-1500 Mono CMOS (Sony IMX273)


Moravian Instruments C1-1500 Mono CMOS (Sony IMX273)


can be shipped within 7-10 days

£386.00
Price includes VAT, plus delivery


The Moravian Instruments C1-1500 Monochrome CMOS can be used for both guiding and imaging.

Its sensor is ideal for imaging the Moon, planets and bright deep-sky objects or use as a guide camera. The C1 series CMOS cameras were designed to be small, lightweight imagers for Moon and planets and for automatic telescope guiding. With proper image calibration, C1 cameras provide surprisingly good results for entry-level deep-sky imaging. The CMOS sensors used have response to light that is linear up to very close to the saturation point, so, C1 cameras can be used for scientific applications like variable star research

C1 cameras are capable of very short exposures. The shortest exposure time is 125 μs (1/8000 of second). This is also the step, by which the exposure time is expressed. So, the second shortest exposure is 250 μs etc. Long exposure timing is controlled by the host PC and there is no upper limit on exposure time. In reality the longest exposures are limited by saturation of the sensor either by incoming light of by dark current (see the following sub-chapter). The sensor response to light is perfectly linear. This means the camera can be used also for entry-level research projects, like for instance photometry or brighter variable stars etc.

C1-3000 (IMX252) response to light C1-3000 (IMX252) response to light

Sensor Cooling Dark current is an inherent feature of all silicone circuits. It is called “dark”, because it is generated regardless if the sensor is exposed to light or not. Dark current, injected into individual pixels, appear in images as noise. The longer exposure, the greater amount of noise is present in every image. As it is generated by random movement of particles, it depends on the temperature exponentially (this is why the noise generated by dark current is also denoted “thermal noise”). Typically, lowering the sensor temperature by 6 or 7 °C halves the dark current. While the C1 cameras are not equipped with active thermo-electric (Peltier) cooling, they are still equipped with a small fan, exchanging the air inside the camera body. What's more, a small heat sink is located directly on the sensor (with the exception of the C1-1500 model, whose sensor is too small for a heat sink) to remove as much heat as possible. So, the C1 sensor cannot be cooled below the ambient temperature, but its temperature is kept as close to environment as possible. Compared to closed designs, the sensor temperature in the C1 camera can be up to 10°C lower and resulting dark current may be less than half. Cooling air intake is on the left side of the camera (left image), while the output vents are on the opposite side (right image) Cooling air intake is on the left side of the camera (left image), while the output vents are on the opposite side (right image) The fan operation can be controlled from the software. SIPS directly offers a slider controlling fan in the “Cooling” tab of the main camera control tool window. Camera drivers for other software must rely on driver configuration dialog box to control fan. With fan off, sensor temperature quickly rises more than 10 °C above ambient. Turning fan on lowers the temperature by 5 °C or more. With fan off, sensor temperature quickly rises more than 10 °C above ambient. Turning the fan on lowers the temperature by 5 °C or more.

The compact and robust camera head measures only 57 × 57 × 48 mm not including the CS-mount lens adapter. With standard CS-mount adapter, camera depth increases to 54.4 mm. C1 camera Back Focal Distance is 12.5 mm, which makes it compatible with vast number CS-mount compatible of CCTV lenses. If C-mount lens has to be used (with 17.5 mm Back Focal Distance), a simple 5 mm thick adapter ring can be used.

Note: The camera head can be directly equipped with a C-mount adapter or with T-thread M42 × 0.75 adapter with 55 mm Back Focal Distance etc. However, such modification requires camera disassembly and can be performed only if the camera is sent to manufacturer or it is ordered like this.

The head is CNC-machined from high-quality aluminum and black anodized. The head itself contains USB-B 3.0 (device) connector and standard 6-pin “autoguider” connector.

Developed and manufactured in Europe to highest standards.

Sensor: Sony IMX273 Monochrome CMOS

Resolution: 1456 x 1088 pixels

Pixel Size: 3.45 x 3.45 µm

Imaging Area: 5.02 x 3.75 mm

Diagonal size: 6.27mm

Interface: USB 3.0

Download time: appr. 0.05s with USB3.0

Cooling: passive fan cooling

Head dimensions 57 mm × 57 mm × 54.4 mm (including lens adapter)

Back focal distance 12.5 mm (CS-mount compatible)

Camera head weight 215 g

Telescope/lens adapter C-to-1.25” barrel adapter, compatible with standard 1.25” eyepieces, is included into camera package.

So, the C1 camera can be easily mounted into virtually every astronomical telescope instead of an eyepiece.

Note: If the C1 camera should be used with OAG for cooled Cx or Gx cameras, a short 10 mm C-to-1.25” barrel adapter has to be used. This adapter, shipped with the respective Moravian OAG, is fully compatible with C1 camera.

Tripod and metric threads. The C1 camera bottom contains standard 1/4" (tripod) thread and 4 metric M3 threaded holes.

Software support - Software and driver support of the Cx series CMOS cameras is as rich as is the case of their Gx series CCD camera siblings. However, latest versions of all software packages and drivers have to be installed to use Cx cameras. If the C1 camera is connected directly to host PC using USB cable, a new system driver CxCamera.sys must be installed (see the “Installing and Using Drivers and Software” manual, shipped with every camera). The system driver pre-installation package version 2.0 and later contains this driver.

First light images - See above the very first prototype of a C1-3000 camera was used by renowned astro-photographer Martin Myslivec. He used the Borg 77ED refractor telescope on the EQ6 mount to capture several unguided exposures. Despite the fact Martin is a highly skilled and experienced astro-photographer, the performance of C1 camera is very good also for deep-sky imaging. The M31 Great Andromeda galaxy is a stack of 197 exposures 20 s long (approximately 1 hour and 5 minutes of total exposure time). No image processing was performed beside individual frame calibration and slightly non-linear stretching. The M42 Great Orion nebula image was combined from two sets of exposures (kind of HDR image processing). Faint nebulosity, far from the image center, was acquired using 100 exposures 20 s long (approximately 33 minutes of total exposure time). The very bright central part of the nebula was captured with only 2 s long exposures (again 100 of them), which leads to approximately 3 minutes of total exposure time. The very short exposures allowed to perfectly capture the 4 central stars (called Trapezium) without over-exposing them. The image of M45 Pleiades is a combination of 218 exposures 20 s long (approximately 1 hour and 12 minutes of total exposure time). Again, no image processing was performed, only the calibration and slight non-linearly stretch was performed.

Browse these categories as well: Guide Cameras, Moravian Instruments