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How does an eyepiece effect F/ratio? - Eyepieces - Cloudy Nights
- https://www.cloudynights.com/topic/608205-how-does-an-eyepiece-effect-fratio/#:~:text=An%20F%2Fratio%2C%20by%20definition%2C%20is%20the%20focal%20length,with%20using%20eyepieces%20is%20when%20doing%20eyepiece%20projection.
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Eyepiece Projection - Astronomy Source
- https://astronomysource.com/eyepiece-projection/
- The number shows that eyepiece projection focusing can really be a challenge and has to be done carefully in minute steps. Focal ratio overall EP setup (1/f oEPs) 1/f oEPs = FLoEPs / TA = 3600 / 120 = 30 The original …
Eyepiece Projection Calculator — Starizona
- https://starizona.com/blogs/tutorials/eyepiece-projection-calculator
- Tip: The distance from eyepiece to CCD is typically in the range of 90-120mm. Enter the original focal length and ratio of your telescope. Then enter the focal length of the eyepiece you will use for eyepiece projection imaging and the distance from the eyepiece to the CCD chip. Original Telescope Focal Length (mm) Original Telescope Focal Ratio
What the “f/ratio” Means in Telescope Lingo
- https://telescopeschool.com/what-the-f-ratio-means-in-telescope-talk/
- The f/ratio in photography means the same for telescopes. It is the f ocal length of the telescope divided by its aperture. One of the most common telescope …
I’m doing photography with an eyepiece, using my …
- https://www.celestron.com/blogs/knowledgebase/i-m-doing-photography-with-an-eyepiece-using-my-camera-with-and-without-a-lens-what-are-the-f-numbers-of-my-setup-for-the-afocal-and-eyepiece-projection-methods
- For eyepiece projection, it's the magnification factor times the scope f-number. The magnification factor is the distance between the film or chip and the eyelens of the eyepiece divided by the eyepiece focal length, minus 1. Choosing 150 mm as the chip-eyelens distance with the same scope as above, it would be 150/15 - 1 or 9 for the magnification factor. 9 x 10 or f/90 …
How does an eyepiece effect F/ratio? - Eyepieces - Cloudy …
- https://www.cloudynights.com/topic/608205-how-does-an-eyepiece-effect-fratio/
- The best way to calculate the true FOV of an eyepiece is to divide the field stop of the eyepiece by the focal length of the OTA - and then multiply the result by 57.3 degrees. You can make an approximation of the FOV by taking the AFOV of the eyepiece and dividing that by the magnification of the eyepiece/telescope combination.
How Do You Calculate The F Ratio Of A Telescope …
- https://www.amazingtelescopes.com/recommendations/how-do-you-calculate-the-f-ratio-of-a-telescope-mirror-question.html
- An 80-mm-wide lens with a focal length of 400 millimeters, for example, corresponds to an f/5 focal ratio for a telescope. The f ratio of a telescope’s main lens or mirror (also known as the objective) is an essential figure since it is simply the ratio of the focal length to the diameter D of the objective. The formula for the f ratio is f ratio = f / D. According to the …
Telescope F ratio - Digital Photography Review
- https://www.dpreview.com/forums/thread/3998415
- F-ratio determines light density in the focal plane. Light density is used to calculate relative exposure. Yes, for an object, like a star, a galaxy inside the frame, you get the same amount of light from the object in the same exposure time (or visually looking). Your question was about exposure to 1/3 histogram.
Eyepiece Projection Astrophotgraphy | Photograph the …
- https://astrobackyard.com/first-post-full-moon/
- Even auto may work, as long I have turned the flash off. Below, I list some generic settings for photographing the moon through your telescope eyepiece. Point and Shoot Camera Settings for the Moon: Mode: Manual. Aperture: F/5.6. ISO: 200. Exposure: 1/1000. White Balance: Auto. You’ll need to experiment heavily with settings on the eyepiece here.
Imaging Setups for Astrophotography
- https://astropix.com/html/astrophotography/imaging_setups.html
- Barlows, Eyepiece Projection, and Afocal Projection all increase the focal length and magnification of the telescope, make the focal ratio slower, and reduce the field of view. In all of these systems, focus can be accomplished with the methods outlined in the section on focusing.
What is eyepiece projection and how do I do it? - BBC Sky at Night …
- https://www.skyatnightmagazine.com/advice/what-is-eyepiece-projection-how-do-it/
- Steve says: "Eyepiece projection is a method of capturing images through a telescope’s eyepiece using a camera with its lens removed, and is normally used where high magnification is required, for example when imaging planets or features on the Moon. One of the issues associated with this method of imaging is attaching the camera adequately ...
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