Field Flattener f/5 to f/7 92-series-eyepieces the National Geographic 300x-1200x Microscope

the National Geographic 300x-1200x Microscope offers powerful tools to examine specimens in detail

The 8x magnification offers a stable

Designed for both night sky enthusiasts and nature observers

and smart functionality that enhances every observing session

Meets the Transmission Requirements of AS/NZS 1338

Field Flattener f/5 to f/7 92-series-eyepieces the National Geographic 300x-1200x MicroscopeWhen doing astrophotography with refractor type telescopes, the faster the focal ratio the more field curvature becomes a problem. Field curvature will appear in the corners of astrophotographs, making the stars smear perpendicular to the axis of the image. This is called coma coma is Latin for comet, because the stars look like comets. The more the curvature, the closer to the center the coma appears. The larger the sensor, the worse the coma.