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How Focal Ratio Affects Your Astro Images - Sky & Telescope
- https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/how-focal-ratio-affects-your-astro-images/#:~:text=A%20200-mm%20%288-inch%29%20telescope%20with%20a%202%2C000-mm%20focal,produces%20a%20much%20brighter%20image%20of%20your%20target.
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How Focal Ratio Affects Your Astro Images - Sky
- https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/how-focal-ratio-affects-your-astro-images/
- A 200-mm (8-inch) telescope with a 2,000-mm focal length has a focal ratio of f/10. By contrast a 200-mm astrograph (a telescope designed for astrophotography) that has a focal length of 400 mm will have a focal ratio of …
How to Choose the Best Focal Ratio for Astrophotography
- https://starrynova.com/best-focal-ratio-for-astrophotography/
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What Does Focal Ratio Mean In Telescopes? The Simple …
- https://backyardstargazers.com/what-does-focal-ratio-mean-in-telescopes/
- The focal ratio is used to determine the “speed” of a telescope. The closer the focal ratio number is to 1 the “faster” the telescope is. For example, if you are …
Best Focal Ratio for Telescopes - Scope The Universe
- https://scopetheuniverse.com/best-focal-ratio-for-telescopes/
- Usually, a focal ratio of f/10 works well if you want to explore the narrow view of objects in space. This type of focal ratio works best if you want a narrow but sharp view of the moon, star, and other planets. However, for a wide view of objects, you will need something shorter. For instance, a focal ratio of f/7 should be enough to grasp the wide view of galaxies and the Milky Way.
6 Best Telescopes for Astrophotography in 2022 - Shotkit
- https://shotkit.com/best-telescope-astrophotography/
- A faster f/4 or f/5 focal ratio is best for wide-field observing and deep-sky images. A focal ratio between f/11 and f.15 is ideal for photographing bright objects like the moon, planets, and binary stars – the kind of incredible imagery you might have seen on sites like Astrobin.
Telescope Focal Length Explained: Why Does It Matter?
- https://starlust.org/telescope-focal-length/
- Let’s say you have a reflecting telescope with an aperture of 6 inches (152.4mm) and a focal length of 1000mm, your focal ratio is 1000/152.4= 6.56! In …
What the “f/ratio” Means in Telescope Lingo
- https://telescopeschool.com/what-the-f-ratio-means-in-telescope-talk/
- This is where you can see the real image of a distant object. The focal length of the objective lens or mirror of a telescope influences the total length of the telescope. Ad: AstronomyWear.com. The f/ratio in photography means the same for telescopes. It is the focal length of the telescope divided by its aperture. One of the most common telescope designs is a 120mm aperture …
Telescope Focal Ratio - Beginners Forum (No astrophotography)
- https://www.cloudynights.com/topic/808353-telescope-focal-ratio/
- Telescope Focal Ratio - posted in Beginners Forum (No astrophotography): Hello All. Im looking for opinions regarding the focal ratio of telescopes. A little background: My stable includes a 6 and an 8 f/10 sct, a 6 f/8 newtonian and a 4 f/4 newtonian. Im partial to the slower f ratios as the coma in the faster scopes seem to bother me, but I do like the wider field of views …
Astrophotography, Pixel by Pixel: Part 2 - Focal Ratio Effects
- https://cloudbreakoptics.com/blogs/news/astrophotography-pixel-by-pixel-part-2
- While aperture cannot be completely ignored in astrophotography, often what we care about more is the focal ratio of the telescope. The focal ratio is a unitless number, and can be found by dividing the focal length of the telescope by the aperture. For example, if a telescope had 80mm of aperture and a focal length of 500mm, then the focal ratio of the scope would be …
Astrophotography and F ratio - Beginners Forum (No
- https://www.cloudynights.com/topic/469323-astrophotography-and-f-ratio/
- Here's the way I think about it.. Astronomers think in aperture(diameter) and focal length or focal ratio. Photographers (not me) think in terms of focal ratio and focal length. Consider two telescopes: A 100mm aperture with a 1000mm focal length = F/10 A photographer thinks of this as 1000mm F/10 lens.
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