1X White flat field board Luminous flat field board Special for astrophotography

Small: telescope light inlet hood diameter: between 50-190MM (generally suitable for 50-150MM refractor telescopes and cattle reverse, RC telescopes)

Medium: telescope light inlet hood diameter: 240MM (generally suitable for RC8, 200F4 cattle reverse, C8HD telescope)

Large: telescope light inlet hood diameter: 340MM (generally suitable for RC10, 10-inch cattle reverse, C11HD telescope)

Luminous 120: Fixed Diameter: 95-134MM

Luminous 170: Outer diameter 180MM, flat field light source 170MM

Luminous 250: outer diameter 260MM, flat field light source 250MM

Luminous 325: outer diameter 340MM, flat field light source 325MM

 

Application reason:

1. After the telescope is imaged by the lens, the imaging rate in the center is generally high, and the surrounding areas will gradually dim the light. Flat field is mainly after shooting, to offset this light reduction.

2. The method of shooting the flat field in the early stage is about 30 minutes before the upgrade of the sun, the sky is cloudless and no bright stars, the time is difficult to control, and people are very tired at that time.

Shoot the sky with a few seconds of exposure, limited by weather, time, and energy.

Shooting method:

In the daytime, find a cloud-free area with average light, install the flat field plate, connect the camera, use the deep space, the same focal length, and shoot for 2-4 seconds of exposure, and get the same curve as when the sun rises, Use superimposed.