Celestron M48 Adapter for EdgeHD 925, 1100 und 1400 Telescopes

Celestron M48 Adapter for EdgeHD 925, 1100, and 1400 Telescopes

The M48 adapter is the accessory of choice if you want to attach your full-frame DSLR or astronomical camera to a Celestron EdgeHD tube. As DSLR sensor chips getting larger, Celestron has developed this M48 adapter to reduce vignetting and provide a larger light path to your camera´s sensor, producing exceptional astrophotos.

The standard T-Adapter for EdgeHD 9.25", 11", and 14" comes with a 42 mm T-Thread for a 42 mm T-Ring. This smaller 42 mm T-Adapter truncates the light cone coming from the back of the EdgeHD optical tubes, which creates vignetting in the corners of full frame imaging sensors. The M48 adapter has a larger clear aperture, allowing the unhindered light to illuminate the entire sensor, optimizing your full-frame sensor´s capabilities.

Below you will find the difference between the 42 mm and 48 mm rings to give you an idea of the clear diameter offered by the 48 mm thread compared to the classic 42-mm T-adapter:



The 48-mm thread adapter will not any advantage to imagers using smaller APS-C sensors. An M42x0.75 (T2) adapter is still recommended for this purpose.

The diagram below shows the relative illumination of the sensor in a 42 mm and a 48 mm thread adapter. The X-axis is the distance from the center of the camera sensor. The Y-Axis is the amount of light being received. As you can see, the 48 mm diameter allows more light to reach the sensor than the 42 mm T-adapter does, which reduces vignetting in your photos.

- Adapter
- Collar

Safety informations: PDF Download