Field Flattener f/5 to f/7

Field Flattener f/5 to f/7When 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.

The mount is designed to hold up to 19 lbs (scope

and pinpoint star fields

these binoculars have an open bridge for steady gripping and feature twist-up eyecups to comfortably accommodate observers with or without eyeglasses

Signed by the Author for Delivery at the Arizona Dark Sky Star Party

Item Number EPWP12009–01

Publish local weather station data on Weather Underground & Weather Cloud

and the included smartphone adapter allows you to capture and share your discoveries with ease

The Explore Scientific AR152 Air-Spaced Doublet Refractor is a classic 6-inch (152mm) crown-and-flint achromatic refractor delivering bright

When it is time for a charge

and light transmission

and smartphone imaging adapter all come standard

to position and hold your imaging system