Nikon Camera D850a Full Range (75015)

The small "a" in the camera model stands for astromodified. Standard cameras typically include a filter that reduces the red spectral range, so the sensor closely matches human color perception in daylight. However, this filter also blocks the important H-alpha wavelength, which is crucial for capturing the glowing gas nebulae seen in astronomy. During astromodification, this filter is removed to allow greater sensitivity to red light, especially in the H-alpha and SII ranges.

With astromodification, the DSLR becomes much more sensitive to these wavelengths, making it possible to photograph gas nebulae that would otherwise be difficult to capture. Because these nebulae are often very large, the camera’s large sensor is fully utilized for wide-field astrophotography.

Advantages of an Astromodified DSLR for Astrophotography

• Excellent for imaging extended nebulae, thanks to the large sensor and increased H-alpha sensitivity.

• Built-in computer functionality eliminates the need for a laptop or external power supply, reducing cable clutter.

• Compatible with a wide range of accessories and offers versatile applications.

• Monitor with LiveView for easy focusing and framing.

Astromodification is performed by AstroHobby in Italy, where the original Canon filter is replaced. There are several types of astromodification available:

Baader Astromodification: Uses the Baader Planetarium BCF filter, developed in Germany, which allows light from 420-680 nm to reach the sensor. This results in four times greater sensitivity to H-alpha compared to an unmodified camera.

Super UV/IR-Cut Astromodification: Similar to the Baader filter, but with an even wider transmission range (400-700 nm), allowing all visible light to be captured.

Full Range Astromodification: The camera becomes sensitive to ultraviolet, visible, and infrared light starting at 300 nm. This version is ideal for maximum flexibility. With additional filters, the camera can be used for standard daylight photography, pure infrared imaging, or advanced astrophotography.

The astromodified camera is delivered with the same accessories as the original manufacturer: camera body, battery, charger, USB cable, and manual.

Please note: For astromodification, the original packaging is opened and the camera is tested, so the shutter count will not be zero. However, the cameras are not used, and any used items are clearly marked as such in the shop.

Specifications

Capacity

• Model designation: D850