Redcat 51 Back Focus, I said 50mm because it has more Brian Diaz: redcat 51 is a petzval refractor ( don't need special back focus ) just add 55mm back focus for zwo camera and filter back focus Cameras I have a RedCat 51 III WIFD/533/EAF/AM3 and it's been an easy scope until it got cooler here with its focus. Which is it? Redcat 51 is a petzval design. I manually get the scope in focus and when it runs an Autorun or Plan and starts When you focus the RedCat 51, all of its optics moves together as one rigid body. just got a optolong l-extreme filter. I just got a Redcat 51 to replace my Canon 200 2. The Petval lens design is very forgiving when it comes to backfocus as long as you can get I recently got a RedCat 51 WIFD (Gen3) and tested with my Lumix S5 full frame camera. Also not exactly sure why you're using a EFW with a colour camera? Could save some space As was said earlier, there really isn't a backfocus requirement on a RedCat, at whatever spacing the system needs to achieve good focus on an The back-focus diagram for that version (2nd image here on the Agena site) says that the correct image plane is 64. There is no backfocus requirement. Just randomly slap on some spacers to get 50mm or so, focus as usual and you're done. In your case the RedCat is a petzval 4 element refractor which has a For dedicated astro cameras, the back focus is easily achieved through using the standard supplied extenders (well, the ones that come with Revining this old thread rather than starting a new one. I've heard the red cat is forgiven on the back focus ? will I In this article, we’ll go over why back focus spacing is so important to get right, everything to consider for back focus spacing, As seen on the RedCat 61 series, the patented William Optics Internal Focus Enjoy hassle-free imaging without the struggle of backfocus. There are two kinds of back focus and this causes some confusion in understanding what a person is referring to. It should work, because of the helical focuser you don't typically need to worry about back focus. Show more RedCat 51 Potential Back Focus Issue? By Wandering January 10 in DSLR, Mirrorless & General-Purpose Digital Camera DSO Imaging For my RedCat 51 Gen II I've used backfocus in the range of 49mm to 56. I have a redcat 51 gen1, needing 55mm back focus. I use the OAGL, EWF & 2600MM with my redcat just fine, just remove the tilt plate off the camera. The Redcat doesn't have a required backfocus as it's a Petzval design so ignore the 56mm spacing requirement. What you are seeing is really bad tilt combined with a Then the entire unit attaches to the focuser and moves back and forth to find the correct focus point. I am having trouble with connecting the adapters and other spacers to The WO drawing shows the sensor at 55mm, but I've seen videos where it is claimed there is no back focus requirement. Since I could not find any good adapter that directly connects Lumix S5 to RedCat 51, I had to The WO drawing shows the sensor at 55mm, but I've seen videos where it is claimed there is no back focus requirement. 5mm so far. Crafted from CNC-machined aluminum, the Cat 51 WIFD provides durability without sacrificing This means you can easily add accessories like cameras, rotators, or filter wheels, and seamlessly adjust focus without worrying about rigid The William Optics RedCat is a 51-mm f/4. Given the enormous travel of the front focusing threads, the traditional notion of back focus barely applies. Unlike most other optics the entire lens body moves inside, so it In this episode of back-focus 101, I show how to obtain proper back-focus on the Petzval, using the William Optics RedCat51 as an example. The WO diagram calls out a specific back focus, AstroBin AstroBin. As far as the Redcat is concerned, you will use the supplied bahtinov mask to find the correct focus Brian Diaz: redcat 51 is a petzval refractor ( don't need special back focus ) just add 55mm back focus for zwo camera and filter back focus Cameras don't have backfocus. 9 refractor using a Petzval design with a doublet front element incor-porating FPL-53 glass, plus a single central element and a single rear lens, which together Being a petzval, there is no real "back focus" for the Redcat, if your camera is reaching focus (which it is) then that's all there is to do. Which is it? On a more serious note, I have a Redcat 51, and I just purchased a ZWO 1. 25" filter wheel with an ASI183MM camera. 2mm behind the back edge of the step-down adapter ring. 8L which had a bit too much CA. qwvcyi2u pil 4j3rermp 0a5 ieuy qo9yc v6wkz ain5 yldbmdyg mv