3" Field Flattener/.7x Focal Reducer - Save $80 As a field flattener, this multi-faceted imaging accessory addresses the edge-of-field aberrations caused by curved focal planes to ensure your night at the eyepiece will result in crisp, true images. As a focal reducer, this device will reduce your f-ratio by .7, which results in a wider field of view, brighter images and less exposure time. This field flattener/focal reducer boasts fully multi-coated optics and comes with a 2" adapter to accommodate different focuser sizes and two T-thread adapters. Variable Coma Corrector - Save $60 Coma is a common optical aberration that can plague the outskirts of your image. When coma is present, stars in the center of the field will pop like precise points of light, but stars at the edge take on an unnatural comet-like shape. Explore Scientific's Coma Corrector can help you minimize or even eliminate image aberrations caused by this off-axis optical phenomenon even in fast Newtonians. Our 2" coma corrector offers multi-coated lenses, a black-anodized aluminum barrel with spacer markings and a textured rubber grip. Tightly secured by three thumbscrews, this accessory comes with two adapters (.75" and 1") to secure to your T adapter and a protective cap. |
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