I’ve built a DIY dedicated flat field panel using a repurposed LED light fixture. The flat field panel is a light source with relatively uniform brightness. The panel attaches directly onto my telescope and can be used for taking flat frames.
If a telescope with camera captures a target that is known to have a uniform brightness or illumination (such as this DIY flat field panel), the unevenness in the illumination of the field such as vignetting or presence of dusts are revealed. When a flat frame is applied to an image, any variation in brightness or illumination across the frame is leveled out, thus, vignetting and dusts are removed in the image.
To view posts on DIY projects and astronomical equipment, click here.
Night Sky in Focus © Anthony Urbano | Bacoor, Philippines
Night Sky in Focus 