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Afocal imaging – Backyard AstroScience
- https://www.backyardastroscience.com/techniques/astrophotography/afocal-imaging/
- Afocal imaging – Backyard AstroScience Afocal imaging Afocal imaging is a technique where your camera shoots images using your telescope as a long lens. … additional content is available for registered members. Log In Register
Afocal What? - Sky & Telescope - Sky & Telescope
- https://skyandtelescope.org/astronomy-resources/afocal-what/
- To the uninitiated, nothing could be more logical than afocal photography: if you look through a telescope’s eyepiece, why wouldn’t you point a camera into it? And before single-lens reflex cameras became popular in the 1960s, that’s what most of us did when we wanted pictures of the Moon and, for the very adventurous among us, planets.
Afocal imaging - Experienced Deep Sky Imaging - Cloudy Nights
- https://www.cloudynights.com/topic/660567-afocal-imaging/
- Afocal imaging - posted in Experienced Deep Sky Imaging: Dear CN-ers, for a research project I need several images taken through the eyepiece of a 60mm Galilean Type Telescope, which is called afocal imaging. So I really want to capture what the observer would have seen and in that the eyepiece plays an important role. In my observatory I have a ZWO …
Approaches to Afocal Photography - Naturfotograf
- http://www.naturfotograf.com/farside_afocal.html
- "Afocal photography, another lensless approach, doesn't use an aperture at all and the imaging rays are recorded directly onto the medium. If all rays striking the medium are randomly orientated there will be no perceptible density variation in the image and no meaningful photograph can result.
Afocal Astrophotography Experiment – SKY LIGHTS
- https://sky-lights.org/2021/01/25/afocal-astrophotography-experiment/
- If you want to photograph afocally through a tracking telescope, get a smartphone eyepiece adapter that clamps securely to the scope and only needs to be adjusted once. I knew these adapters existed, but they were too pricey for this first experiment. Used properly they can virtually eliminate focus errors.
Section 12 Afocal Systems
- https://wp.optics.arizona.edu/jgreivenkamp/wp-content/uploads/sites/11/2018/12/201-202-12-Afocal-Systems.pdf
- Imaging With Afocal Systems While it may seem impossible at first glance, afocal systems can be used to form images. Consider an object at the front focal point of the first lens. It is imaged to the rear focal point of the second lens with the magnification of the afocal system. 2 1 hf m hf z h' f 1 + f 2 F 1 F2 h f1> 0 f2> 0 z
Astro-Tutorial #1.14: Attaching the Camera - Afocal
- https://www.youtube.com/watch?v=5FF6eWj3VNI
- Hey folks, in this episode we will discus the different methods of attaching your camera to your telescope. - Afocal projection - prime focus imaging - eyepiece projection In the end you will...
Tele Vue Optics: Imaging Methods
- https://www.televue.com/engine/TV3b_page.asp?id=85
- (5) Afocal Imaging is ideal for nature photography as well as planetary imaging when long eye-relief eyepieces are used (to prevent vignetting). A wide power range is easily achieved using Delos, Panoptic, Plössl and Nagler eyepieces with at least 17mm eye-relief. See eyepieces recommended for digiscoping in Eyepiece Specifications table.
Digital Camera for Astrophotography: Get Started - Sky
- https://skyandtelescope.org/astronomy-resources/astrophotography-with-a-digital-camera/
- Like the old eyepiece-projection technique, the afocal method dramatically increases the image size at the expense of a much slower effective f/ratio (or photographic speed). You may also get some vignetting and image distortion. Vignetting is the darkening of an image's edges that happens when light is cut off by mechanical limitations.
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