Sony Camera A7Ra III Super UV/IR-Cut (75026)

The Sony A7Ra III Super UV/IR-Cut is an astromodified version of the Sony A7R III camera, specially adapted for astrophotography. Standard cameras use a filter to block much of the red spectrum, matching human color perception in daylight, but this also blocks the crucial H-alpha emission line needed to capture the glow of astronomical gas nebulae. With the Super UV/IR-Cut modification, the original filter is replaced by one that allows the entire visible spectrum (400–700 nm) to reach the sensor, significantly increasing sensitivity to H-alpha and SII emissions while blocking unwanted ultraviolet and infrared light. This enables the camera to reveal and photograph faint nebulae and other deep-sky objects that are difficult to capture with an unmodified camera.

The Sony A7Ra III Super UV/IR-Cut is an excellent choice for astrophotographers who want increased sensitivity to deep-sky objects, especially faint nebulae, while keeping all the advanced features and flexibility of the original Sony A7R III.

Astromodification Benefits and Features

• The Super UV/IR-Cut filter allows the camera to capture all visible light between 400 nm and 700 nm, maximizing sensitivity to astronomical features while blocking UV and IR wavelengths that can reduce image sharpness.

• Enhanced red sensitivity is ideal for imaging extended gas nebulae, making full use of the large 42.4-megapixel full-frame sensor of the A7R III.

• The camera retains all standard functions, including autofocus, LiveView, and the ability to be used for regular photography with a custom white balance.

• The camera is portable and easy to use, with no need for an external computer or power supply.

• The package includes the camera body, battery, charger, USB cable, and manual.

Types of Astromodification Available

• Baader Astromodification: Uses a Baader BCF filter to transmit 420–680 nm, increasing H-alpha sensitivity by about four times compared to an unmodified camera.

• Super UV/IR-Cut Astromodification: Uses a filter that transmits the full visible spectrum (400–700 nm), maximizing light collection and blocking UV/IR.

• Full Range Astromodification: Expands sensitivity to ultraviolet, visible, and infrared light starting at 300 nm for maximum flexibility.

Additional Notes

• The astromodification is performed by specialists such as AstroHobby in Italy, who carefully remove and replace the original filter.

• During the modification process, the camera is opened and tested, so the shutter count will not be zero, but the camera is not used for regular photography and is sold as new unless otherwise specified.

• The scope of delivery matches that of the original manufacturer.

Specifications

• Model: A7R III