Cameras

Matching a Sensor to Your Telescope

The number that matters most is pixel scale in arcseconds per pixel, which is pixel size divided by focal length and multiplied by 206.265. Aim for roughly 1 to 2 arcseconds per pixel under typical Canadian seeing.

• Cooled deep-sky cameras: Thermoelectric cooling holds the sensor well below ambient, which suppresses dark current and makes calibration frames repeatable across a session.
• Monochrome versus colour: Mono with filters collects more photons per pixel and gives higher resolution and full narrowband capability; one-shot colour is simpler and captures all channels at once, which suits limited clear nights.
• Planetary and lunar cameras: Small, fast, uncooled sensors that capture hundreds of frames per second so that lucky imaging can select the sharpest moments of seeing.
• Guide cameras: Small sensitive sensors with high frame rates, paired with a guide scope or off-axis guider to correct mount error in real time.
• Sensor format: Larger sensors demand a corrector that covers the full field and filters sized to match, so a full-frame camera has consequences well beyond its own price.
• Read noise and full-well depth: Low read noise permits short sub-exposures under light pollution; deeper full wells preserve bright stars from saturating.

Why Choose David Astro for Cameras

A camera is the middle of a system. Getting it right means checking what sits on either side of it.

• Pixel scale calculated first: We work out arcseconds per pixel for your focal length before recommending a sensor, so you are not paying for resolution your sky cannot deliver.
• Back-focus specified with the camera: We supply the spacer and adapter list alongside the camera, including the shift your filters introduce.
• Cooling and power realities: Cooled cameras draw meaningful current, and we size power supply and cabling for cold-weather operation.
• Authorized dealer: Full manufacturer warranty on every camera, verified authenticity, and warranty service handled in Canada.
• In-house diagnostics: If a cooler underperforms or a sensor shows an artifact, we can test it here rather than shipping it abroad.

Cameras in Canada — Frequently Asked Questions

Monochrome or one-shot colour?

One-shot colour if clear nights are scarce and you want a finished image quickly. Monochrome if you want maximum resolution and narrowband imaging from a light-polluted site, accepting that each target takes several times longer.

What pixel size should I choose?

Divide pixel size in microns by focal length in millimetres and multiply by 206.265. Target 1 to 2 arcseconds per pixel. Short focal lengths need small pixels; long focal lengths need larger ones.

Do I need cooling in a Canadian winter?

Cooling still matters, because its real value is holding a stable, repeatable temperature so your dark frames match your lights. Ambient cold alone drifts throughout the night.

Will you help with spacing and drivers?

Yes. We supply the back-focus calculation with the camera and help with driver and capture software setup after it arrives.

Matching a camera to your scope?

Send us your focal length, sky and targets and we will calculate the right sensor. Canadian stock, expert configuration support.