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Apochromatic lenses for astrophotography in the 60–150 mm aperture range have been developed and marketed by several firms, with focal ratios ranging from f /5 to f / 7. Focused and guided properly during the exposure, these apochromatic objectives are capable of producing the sharpest wide-field astrophotographs optically possible for the ...
Optical telescopes can be classified by three primary optical designs (refractor, reflector, or catadioptric), by sub-designs of these types, by how they are constructed, or by the task they perform. They all have their different advantages and disadvantages and they are used in different areas of professional and amateur astronomy .
Astro-Physics, Inc. is a manufacturer of amateur telescopes, mounts, and accessories.Founded in 1975 by former Sundstrand Corporation engineer Roland Christen, [1] the company is noted for its line of apochromatic refractors as well as high-end mounts.
The main telescope technologies during this period were refractors with non-achromatic objectives (single lens), speculum metal reflectors, refractors with achromatic doublets objective (doublet lens), and apochromatic triplets (after 1760s) objectives. The list is inherently limited by what examples and records have survived.
Raw image readout allows later better image processing by retaining all the original image data which along with stacking can assist in imaging faint deep sky objects. With very low light capability, a few specific models of webcams are popular for solar, lunar, and planetary imaging. Mostly, these are manually focused cameras containing a CCD ...
We pick the best lenses for astrophotography fans shooting a starry night sky, to suit a range of cameras and budgets
Small deviations from optimal focus are easily visible. For astrophotography, a digital image can be analyzed by software to locate the alignment of the spikes to sub-pixel resolution. The direction of this displacement indicates the direction of the necessary focus correction.
This is a modern amateur Newtonian astrograph, specifically designed for astrophotography. An astrograph (or astrographic camera) is a telescope designed for the sole purpose of astrophotography. Astrographs are mostly used in wide-field astronomical surveys of the sky and for detection of objects such as asteroids, meteors, and comets.