Field Flattener f/5 to f/7 Congrats The Explore Scientific field flattener

The Explore Scientific field flattener is designed to work with telescopes with focal ratios between f/5 and f/7

MATERIAL: Kingman Turquoise

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Base: Rum Cream

Field Flattener f/5 to f/7 Congrats The Explore Scientific field flattenerWhen 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.