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What Is the Best Focal Length? 5 Important Focal Lengths to Try
- https://digital-photography-school.com/5-important-focal-lengths-to-know-and-the-benefits-of-each/#:~:text=5%20Important%20Focal%20Lengths%20to%20Try%201%2024mm.,50mm.%20...%204%2085mm.%20...%205%20135mm.%20
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What focal length is best for astrophotography? - Quora
- https://www.quora.com/What-focal-length-is-best-for-astrophotography
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How to Choose the Best Focal Ratio for Astrophotography
- https://starrynova.com/best-focal-ratio-for-astrophotography/
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Astrophotography and Focal Length: - Clarkvision.com
- https://www.clarkvision.com/articles/astrophotography.and.focal.length/
- You can make great images with a standard DSLR and a range of standard focal length telephoto lenses. Lenses at 200 mm f/2.8 and lower are not too expensive, but 300 mm f/2.8 is. If for example, you use a 300 f/4 lens, exposure times to get to the same faint level will be 4 times longer. These images were tracked with an Astrotrac.
Long Focal Length Telescopes for Astrophotography
- https://skyandtelescope.org/astronomy-blogs/long-focal-length-telescopes-for-astrophotography/
- Long Focal Length Telescopes for Astrophotography Schmidt-Cassegrain Telescopes. Long-focal-length scopes are ideal for imaging the Moon, planets, and the Sun (with an... Maksutov-Cassegrain Telescopes. A Maksutov-Cassegrain is a great portable long focal length option. Richard S. Wright Jr. ...
10 Best Lenses for Astrophotography - FixThePhoto.com
- https://fixthephoto.com/best-lens-for-astrophotography.html
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Best lenses for astrophotography | Space
- https://www.space.com/best-lenses-for-astrophotography
- Best lenses for astrophotography. Best lens for astrophotography overall. (Image credit: Sigma) Sigma 14mm f/1.8 DG HSM Art. Most versatile astro lens. Sigma 14-24mm f/2.8 DG HSM Art. Best budget lens for astrophotography.
Astrophotography focal length. - Refractors - Cloudy Nights
- https://www.cloudynights.com/topic/442457-astrophotography-focal-length/
- I personally find focal length of around 800 to 1000 mm a kind of universal covering most of the messier objects properly but it really depends much on the sensor size/resolution and the mount also. Be sure that you have solid enough mount for the instrument that you choose.
Which long focal lengths make sense for the average astro …
- https://www.astrobin.com/forum/c/astrophotography/equipment/which-long-focal-lengths-make-sense-for-the-average-astro-photographer/
- Bjorn said it very well. If you are happy with your 8inch f/4 Newtonian, I wouldn't go to a longer focal length. With 2.4um pixel (ASI183) you have 0.6arcsec/pix (equal to the diffraction limit at 200mm) and a longer focal length won't hep. Even with 3.7um pixels you have 1arcsec/pix, ideally suited for 2arcsec seeing.
How Focal Ratio Affects Your Astro Images - Sky
- https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/how-focal-ratio-affects-your-astro-images/
- The tradeoff between aperture and focal length is reflected in the instruments focal ratio. 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 f/2. Both telescopes collect the same amount of …
How Do I Decide on Focal Length for Astrophotography?
- https://photography-on-the.net/forum/showthread.php?t=1454184
- Typically it should be at least 1/3rd of the focal length (1/2 of the focal length would be even better.) That means if you had, say, a 600mm focal length imaging scope, then you'd want your guide scope to be at least 200mm. It is "easier" to image at lower focal lengths.
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