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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/
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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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How to Focus your Camera For Astrophotography
- https://astrobackyard.com/how-to-focus-astrophotography/
- A typical astrophotography telescope setup with a dual-speed (Crayford-style) focuser. You’ll likely find it easier to focus a refractor telescope on a bright star than a camera lens. The focuser moves much slower, and you’ll make several rotations of the focuser knob rather than the small turns of a camera lens focus ring.
Imaging Setups for Astrophotography
- https://astropix.com/html/astrophotography/imaging_setups.html
- Imaging Setups for Astrophotography Imaging Setups for Astrophotography In addition to different kinds of telescopes, there are different systems for forming an image at the focal plane of the camera. Prime Focus is where a telescope or camera lens forms an image directly on the sensor of the camera. Field Flatteners correct curved focal planes.
In Astrophotography, Bigger Is Not Always Better! - Sky
- https://skyandtelescope.org/astronomy-blogs/imaging-foundations-richard-wright/astrophotography-bigger-not-better/
- Long focal-length, deep-sky astrophotography (starting around 2,000 mm) is best done from outer space, or when you're well along the challenging learning curve. There are many compact, long-focal-length telescopes on the market for visual observers (think Schmidt-Cassegrains and Maksutov-Cassegrains).
Focal Plane vs Image Plane - Beginning Deep Sky …
- https://www.cloudynights.com/topic/569178-focal-plane-vs-image-plane/
- The focal plane is the place (and the only place) where each of these rays from a point (star) on the object plane converges (i.e. Focuses) to a point on the focal (synonymous with image) plane. So as you moved your paper to and fro, you went from the focal plane where all the points contain perfectly focused light rays to a point where the light rays have diverged (which …
Focal Plane Arrays | Lockheed Martin
- https://www.lockheedmartin.com/en-us/products/focal-plane-arrays.html
- At Santa Barbara Focalplane (SBF), Lockheed Martin’s infrared (IR) center of excellence, seeing is believing. SBF develops and manufactures focal plane arrays (FPAs) that deliver high-resolution imagery in real-time, integrated dewar cooler assemblies for high-performance sensors, and camera cores that offer big-sensor performance in compact and low-SWAP configurations.
Focusing Methods - Astrophotography and Image …
- https://www.astropix.com/html/astrophotography/methods.html
- This method was described by E. S. King in his 1931 classic book on astrophotography, A Manual of Celestial Photography. Focus can be tested by making a series of time exposures and varying the focus during the exposure. A simple tripod can be used instead of a tracking mount as the stars are allowed to trail.
How to Set the Back Focus for Your Telescope (Guide)
- https://optcorp.com/blogs/deep-sky-imaging/how-to-set-the-correct-back-focus
- To calculate how much back focus spacing you need to add, take the thickness of the filter and divide it by 3. So, if you have a filter that is 3mm thick, you need to add 1mm of spacing to your imaging train to retain the correct back focus. Therefore, a 55mm back focus with a filter that is 3mm thick added to the imaging train would become 56mm.
A Primer on Back Focus in Astronomy - Agena Astro
- https://agenaastro.com/articles/miscellaneous/a-primer-on-back-focus-in-astronomy
- First, let’s look at the back focus of a telescope and guide scopes. The back focus of a telescope is defined as the distance between the focal plane of a telescope’s objective lens or mirror and a reference point on the focuser of a telescope, usually the edge of the focuser drawtube when it’s fully racked in (see Figure 1).
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