Field Flattener f/5 to f/7 Congrats Let The Fun Begin"

Let The Fun Begin"

Hecho en Paraguay

which allows the user to attach the device on almost any telescope that uses a mini-Vixen-style-dovetail viewfinder base

Full Flavor Experience:

Field Flattener f/5 to f/7 Congrats Let The Fun Begin"When 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.