WebJul 1, 2024 · Finally, the lens attaches to your DSLR camera with a 48-mm T-ring — not the standard camera-store 42-mm T-ring, but just like it except for the diameter. As with conventional T-rings, the back focus is 55 mm. If you wish, you can use 48-mm threaded adapters to fit the lens to a dedicated astrocamera. Optical design and performance For an interchangeable lens camera, the flange focal distance (FFD) (also known as the flange-to-film distance, flange focal depth, flange back distance (FBD), flange focal length (FFL), back focus or register, depending on the usage and source) of a lens mount system is the distance from the mounting flange (the interlocking metal rings on the camera and the rear of the lens) to the film or ima…
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WebDec 28, 2024 · That is not a backfocus issue. The video starts out in focus but it looks like the camera tried to focus on the hand movements and then just lost focus for some … WebThis inexpensive adapter can be inserted into any 1.25” focuser. A T-Ring can then be screwed onto the adapter, allowing you to connect your SLR or DSLR camera. For example, the Celestron M42 T-Ring for Canon EOS Cameras allows you to connect a standard Canon EOS DSLR camera to your scope. sterifeed bottles
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WebThis quick video will show you how to change your focus button on a Canon DSLR from the shutter button to back button focus. For an in-depth tutorial on bac... WebJul 20, 2024 · A Primer on Back Focus in Astronomy Author: Manish Panjwani and Brian Ventrudo Published: July 20, 2024 Add a Comment Discuss this article in the AstronomyConnect.com forums 1. Overview 2. ... in turn, threads into the female thread M48x0.75 of a T-ring for a Canon DSLR. The T-ring and DSLR consume 55mm of back … WebNov 29, 2013 · Furthermore, the lens-flange-to-sensor spacing on DSLRs varies from make-to-make, so even if the back focus on one brand of DSLR wasn't quite sufficient then another brand might work and as I mentioned earlier there is a so-called zero-length t-adapter that is made for Canon cameras (so instead of taking 55mm of back focus as … sterifeed glass bottles