Antlia ALP-T 5 nm H-alpha/OIII Filter
Select the 2-inch mounted format. Check the mount, focal ratio, and height of the filter mount. Full-frame: Check for vignetting based on the mount and focal ratio.
Price range: CHF 275.35 through CHF 351.12
The ASI2400MC Pro is a full-frame cooled color camera that combines a 24-megapixel Sony IMX410 sensor with 5.94 µm pixels. It is designed for wide fields of view with a 24 × 36 mm optical field of view, a maximum capacity of 100,000 electrons, and an HCG mode with a gain of 140.
CHF 2'428.00incl. Swiss VAT
Part Number ZWO-A142352
The ASI2400MC Pro combines a 24-megapixel back-illuminated Sony IMX410 sensor with a 36 × 24 mm imaging area. Its advantage lies not only in producing a large image: at the same focal length, this full-frame sensor captures more of the sky than a smaller sensor. It is well-suited for extensive nebulae, star fields, and compositions featuring multiple objects, provided the instrument delivers a sufficiently large and well-corrected image circle.
The 5.94 µm pixels represent a different choice from that of cameras with small photosites. They provide less detailed sampling at the same focal length, which can be advantageous with a longer focal length; with a very short focal length, you should instead check whether the stars will remain sufficiently resolved for your purpose. Resolution alone is therefore not a sufficient criterion for making a choice. The color sensor records color information in each series of exposures: no sequence of RGB shots is needed to obtain a color image, unlike with a monochrome camera.
ZWO specifies a maximum capacity of 100,000 electrons and 14-bit conversion. This headroom helps capture bright areas without causing stars to become oversaturated. Monitor their levels during the first few exposures. HCG mode activates at a gain of 140; the manufacturer reports a significant reduction in readout noise while largely preserving the dynamic range. The advertised minimum value of 1.1 electrons and the maximum capacity should not be interpreted as performance levels achievable simultaneously at all gain settings.
With a diagonal of 43.3 mm, it is necessary to check the corrector, the clear passage of the connectors and filters, and the alignment of the optical train. Even a properly centered assembly may still exhibit vignetting or distorted stars in the corners. Flat frames correct for variations in brightness, not for a lack of optical correction. Use the focus distance specified by your corrector, rather than applying a one-size-fits-all distance to all instruments.
The two-stage thermoelectric cooling system is rated to provide a temperature difference of approximately 35 °C below ambient under ZWO test conditions at 30 °C. This is not a guaranteed absolute temperature: choose a setpoint that remains stable throughout the night. A 5-watt heating element warms the protective window and can be disabled via software. The amp-glow-free design eliminates this unwanted electronic glow, but does not eliminate the need for calibration images or sky gradient checks.
The USB 3.0 connection is used to transfer images; an external power supply is required. ZWO recommends 12 V, 3 to 5 A, with a 5.5 × 2.1 mm connector and center-positive polarity. This camera is particularly well-suited for users who already have optics and a mount capable of utilizing the full frame and who wish to focus their session on direct color acquisition rather than managing multiple filtered channels.
Documentation and Compatibility: ZWO official data sheet.
The ZWO ASI2400MC Pro is designed for deep-sky photography using long exposures: nebulae, galaxies, and clusters. Its cooling system (35 °C below ambient temperature) keeps thermal noise very low during exposures lasting several minutes. With its 5.94 µm pixels, it pairs well with instruments having focal lengths of approximately 600 to 1,250 mm (1 to 2″ per pixel). In color, a single series of exposures produces the image; with a double-band filter, it can capture emission nebulae even under light-polluted skies.
The Sony IMX410 combines a full-frame sensor (36 × 24 mm) with large 5.94 µm pixels and a well capacity of 100 ke⁻: bright stars saturate much less, and the 24.5 Mpx files remain lightweight. It has no amp glow and is well-suited for medium to long focal lengths.
The cooling system requires an external 12 V DC power supply; 3 A is recommended (5.5 × 2.1 mm connector, center positive). It is not included with the camera: we recommend the'Pegasus Astro 12 V 10 A power supply (2.1 mm plug). In the field, a Pegasus Astro unit like the Pocket Powerbox Advance It also powers the mount and the heating elements from a single source. Without a 12-volt power supply, the camera operates via the USB cable, but without cooling.
The camera's back focus is 17.5 mm. Mount: M54 × 0.75. If using a corrector or reducer that requires 55 mm, make up the difference with extension rings, taking into account the filter wheel or filter drawer, if present.
We recommend the Antlia ALP-T 5 nm Hα/OIII filter : This dual-band filter isolates the Hα and OIII lines in emission nebulae and significantly reduces light pollution. Get it in a 2″ mount—the ideal size for this large sensor. For galaxies, reflection nebulae, and clusters, the Antlia Quad Band filter reduces light pollution while transmitting the Hα, Hβ, OIII, SII, and NII lines.
With a ZWO OAG Optical Splitter and a small guidance camera like the ZWO ASI220MM Mini, you guide through the main telescope. A guide scope such as the'Askar 32 mm is the simplest alternative.
An anti-fog heating element is built into the front of the sensor window. It prevents fogging and frost when the sensor is cooled well below room temperature.
Yes: A built-in USB 2.0 hub allows you to connect a filter wheel, a guide camera, or a focuser directly to the camera, reducing the number of cables running to the computer.
The manufacturer's manual (in English) is available here: ZWO ASI2400MC Pro Manual (PDF).
Here are a few accessories we've selected for this model, depending on your needs.
Select the 2-inch mounted format. Check the mount, focal ratio, and height of the filter mount. Full-frame: Check for vignetting based on the mount and focal ratio.
2-inch filter mounted. Check which version is compatible with the focal ratio and the height of the mount. Full-frame: Check for vignetting based on the mount and focal ratio.
Optional 7 × 2-inch wheel. Check the height of the filter mounts, the connections, and the focus. Full frame: Check for vignetting based on the lens configuration and focal ratio.
OAG-L Splitter: Check the connections and the draw using the wheel. Guide camera sold separately.
ZWO 12 V / 5 A power supply—optional if you don't already have a suitable power source. Check the connector, polarity, and the power requirements for your setup.
