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Ships within 48 hours · Estimated delivery Aug 26 - Aug 31
25" H-Beta Range from 478nm to 496nm with peak at 489nm
and smart functionality that enhances every observing session
many emission nebulae only come to light when this filter is used and are shown in full extent on the astrophotos
the ED80 is perfect for spontaneous stargazing or as a secondary scope for advanced astrophotography setups
(Notified Body No
Field Flattener f/5 to f/7 92-series-eyepieces 25" H-Beta Range from 478nmWhen 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.
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