Nikon Camera D7500a UV/IR-Cut (77638)

The small "a" in the camera model indicates that it is astromodified. Standard cameras are equipped with a filter that reduces the red spectral range, making the sensor's color response similar to human vision in daylight. However, this filter also blocks the important H-alpha wavelength, which is essential for capturing the glowing gas nebulae in astronomy. During astromodification, this filter is removed, allowing the camera to become more sensitive to red light, especially in the H-alpha and SII ranges.

An astromodified DSLR is therefore much better suited for astrophotography, as it can capture faint gas nebulae that would otherwise be difficult to photograph. These nebulae often cover large areas of the sky, so the camera's large sensor is fully utilized.

Advantages of an Astromodified DSLR for Astrophotography

• Ideal for photographing extensive nebulae, thanks to the large sensor and high sensitivity to H-alpha light.

• Built-in computer functionality means you don't need a laptop or external power supply, reducing cable clutter.

• Wide range of compatible accessories and versatile uses.

• 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 if you want maximum flexibility. With additional filters, the camera can be used for regular daylight photography, pure infrared imaging, or advanced astrophotography.

The astromodified camera is delivered with the same accessories as a standard camera: 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: D7500