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Aperture Size For Astrophotography

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Telescope Aperture Explained: Does Size Really Matter?

    https://starlust.org/telescope-aperture/#:~:text=For%20astrophotography%2C%20it%E2%80%99s%20best%20to%20consider%20telescopes%20with,additional%20magnification%20power%20should%20give%20you%20satisfying%20results.
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Why Aperture is so Important in Astrophotography

    https://www.photographingspace.com/aperture-is-important/
    Because the nature of astrophotography means taking long-exposure photos of something we can hardly see with our eyes, we want to maximize the amount of light that enters the lens. We want to make sure as much light as possible hits the camera sensor as fast as possible. T…

aperture for astrophotography - Imaging - Stargazers Lounge

    https://stargazerslounge.com/topic/194817-aperture-for-astrophotography/
    For astrophotography, focal ratio is pretty much everything. So, a large 11" telescope that's f/10 would be dead slow compared to a 3" that's f/5, as an example. Then there's the focal length and your camera's CCD sensor that define your field of view and image scale but ultimately you want fast focal ratios (f/6 and below is good for astrophotography).

Best lenses for astrophotography | Space

    https://www.space.com/best-lenses-for-astrophotography
    The useful constant aperture of f/2.8 is ideal for astrophotography, as is the focal range, allowing the user 20mm of flexibility to play with in the field.

Telescope Aperture Explained: Does Size Really Matter?

    https://starlust.org/telescope-aperture/
    For astrophotography, it’s best to consider telescopes with at least 6 inches of aperture, with a shorter focal length. Less than that and you will have a hard time capturing enough light to produce satisfying pictures. For planetary …

Aperture Size/ Sharpness ? - Beginners Forum (No …

    https://www.cloudynights.com/topic/764430-aperture-size-sharpness/
    One other thing you might wanna consider is that the smaller scope will be operating at a much smaller exit pupil, and so, defects of your pupil might show up. a 7 inch scope is at 0.35 mm exit pupil at 500X, while a 16 inch scope is only at 0.8 mm exit pupil. 0.8 mm exit pupil is very comfortable, while 0.35 mm is pushing it a bit IMO.

Which Camera Sensor Size is Best for Astrophotography?

    https://expertphotography.com/camera-sensor-size-astrophotography/
    In astrophotography, sizes of stars, nebulae and galaxies are expressed as apparent angular size. The image resolution is expressed as arcseconds/px (also indicated as “/px). This will give you a measure of how big the portion of sky you will record on each pixel is.

Which scope aperture is best for different kinds of …

    https://www.celestron.com/blogs/knowledgebase/which-scope-aperture-is-best-for-different-kinds-of-objects
    The best scopes are at least 5 inches (125 mm) aperture and 1250 mm focal length or more. Open Clusters: Except for the very biggest and brightest star clusters (Pleiades, Hyades, Beehive, Coma Cluster, etc.). You will need as large an aperture as possible and moderate to long focal length as well for the most interesting and star-filled views.

Pixel scale and resolution in astrophotography - astrojolo

    https://astrojolo.com/gears/pixel-scale-and-resolution/
    first sensor with 10×10 um pixels with telescope 100 mm aperture and 1000 mm focal length – so 100/1000. second camera with 5×5 um pixels with telescope 50 mm aperture and 500 mm focal length – so 50/500. Both setups have the same focal ratio and also provide images with the same 1Mpx resolution and the same pixel scale about 2″/px.

Astrophotography: Picking Your Pixels - Sky & Telescope

    https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/astrophotography-pick-your-pixels/
    Small Pixels Rule. Small pixels aren't always bad. In fact, there is a place or two in astrophotography to which smaller pixels are very well suited and even preferred. In deep-sky work, a small-aperture, short-focal-length optic is sampled properly with smaller pixels. That fast focal ratio will deliver a great deal of light to those smaller ...

Astrophotography: real aperture vs f-number? - Photography …

    https://photo.stackexchange.com/questions/2404/astrophotography-real-aperture-vs-f-number
    Let's assume you start with a 50 mm lens with a 25 mm aperture (i.e., f/2). If you change to a 100 mm lens you're reducing the angle of view so you're collecting light from a smaller area -- so you're collecting less light.

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