Focal reducer vs field flattener

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August undefined, 2024

WebMar 29, 2024 · This works perfect for the RC8 flattening the field and reducing the focal ratio from f/8 to a faster f/6.4. The uncorrected focal length of the telescope is 1625mm. With this correction it is 1300mm. As seen in Image 2 and 6, I had to use all three of the supplied focuser extension rings to achieve focus with my CCD camera. WebJul 13, 2015 · If you want to go to a bigger sensor then going with a flattener might be required based on the stock flat field of the scope you are using. There are flatteners only and flatteners/focal reducers. Whether you want a reduction in FL depends on what you plan on imaging and what you plan on imaging it with.

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WebMay be used to increade field of view and reduce magnification for visual applications. An important advancement in high-resolution focal reduction systems, the Meade 4 … WebApr 23, 2024 · No, reducing the focal length increases the field of view. With a given aperture you can reduce integration time by using a more sensitive camera, binning the capture or by using larger pixels. The hyperstar would bring it to F/2, making it a whopping 26 times faster than at f/10. Wrong. Don't be fooled by the Hyperstar website. goldpet horario

Celestron 9.25 XLT vs EdgeHD imaging - If always using focal reducer ...

WebJan 25, 2024 · This will have drastically altered the focal reduction and so the focus point, so remove that spacer The Back focus of the FR is 55 mm. That's the distance from the back of the FR to the Nikon sensor - NOT to … WebJul 18, 2024 · A 0.85x Focal Reducer / Flattener will change the scope to a f/5 at 357mm for the focal length. It will make the scope photographically faster and give you a wide field of view. The Astro-Tech Field Flattener may be a good fit but you will have to play around with the back-focus to get optimum stars. WebMay 25, 2024 · First you would have to shorten the tube because a focal reducer brings the focal plane closer to the objective. Then you would need to design a new module that included a shortened focuser and a way to robustly mount the flattener/focal reducer to this new focuser module. That module would need some way to align it with the objective. gold petite long gown dresses

$William Optics GT81 -- field flattener questions - Refractors$

Nikon 180mm f/2.8 ED vs small refractor? - DSLR, Mirrorless

WebJul 24, 2024 · A better option would be the tunable reducer offered by william optics. You don't mention what camera you are using, if it is smaller than an aps-c then you could be a guinea pig and try the long perng .6x reducer flattener. This would give you F4.8 at 974mm, and personally I would gamble on better coma correction than the ccdt67. WebThe field flattening function: Some focal reducers also act as a field flattener to significantly reduce the field curvature in all Schmidt-Cassegrains and most refractors that causes stars to be out of focus at … gold perth mint barsWebSep 13, 2024 · There are four new models of the Astro-Tech focal reducers and field flatteners designed to fit specific Astro-Tech refractor telescopes which include: – AT80ED .8x Reducer/Flattener: The dedicated fully-multicoated Astro-Tech AT80EDRF converts the 560mm focal length f/7 Astro-Tech AT80ED refractor into a 448mm f/5.6 system. gold petal farms facebook

"WebMay 19, 2024 · SV193 focal reducer and field flattener is suitable for you to take dazzling celestial photos There won’t be any distortion of the star points on the edge of the photo Well made Multi-coated optics High polish Hard anodize finished aluminum body Which is to help reduce weight,it won’t be heavy for you " - Focal reducer vs field flattener

Focal reducer vs field flattener

Field Flattener Lens Groups vs. Petzval Lens Groups

WebSep 26, 2024 · Antares f/6.3 has focal length of 220mm and a diameter of 40mm = (82mm) Meade f/6.3 has a focal length 260mm and a diameter of 40mm = (95mm) Celestron f/6.3 has a focal length 284mm and a diameter of 40mm = (105mm) The further out you are from the sensor, the greater the reduction and vignetting. WebThe required distance varies from ~100 to 130 mm as the telescope focal length increases from 450 to 800 mm. It does work very well. The table shows the required separation between the rear of the flattener and the camera sensor. ♦ focal length < 450 mm: 128 …

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WebThe over 100mm sliding dew cap, which can be clamped in any position, takes into account the maximum image field diameter of the field corrector and focal reducer corrector of 3.85° each. On the dew cap the label Polychromat 100/640, the brand logo APQ as well as the indication of origin Made in Germany are applied. WebThis William Optics Focal Reducer and Field Flattener provides f/6 to f/7/8 focal ratio refractors with 0.72x reduction in effective focal length. Features an STM-coated, fine doublet air-spaced designed lens made using only top-notch Ohara optical glass. Provides coverage for DSLR cameras with full size 50 mm clear lens aperture.

WebJun 13, 2024 · Focal reducers also move the effective focal plane of the objective inward, that is, towards the objective (see Figure 1). The more focal reduction, the further inward … WebApr 21, 2024 · As with all refractors, a field fattener or field fattener-focal reducer is recommended for imaging purposes but it is unusual to use such an adaptor for …

WebOct 13, 2010 · You mentioned the AT line of telescopes. Great choice. I've owned the AT60ED for two years now and love it. For a doublet it performs admirably. I also use the 0.8x ATRF Reducer Flattener to get a flat field, F/4.8 speed, and a focal length of 287mm. I think you would be pleased with it or the AT72EDii depending on what field of view you … WebDec 19, 2024 · The Focuser also can move 360 degrees so you can get any Angle desired for comfortable viewing. It also has 90mm Focus Movement so with correct adapters achieving focus is always possible. The focal Length is 714mm and with Svbony's 0.8 reducer you can get Focal Length down to 572mm for really wide View.

WebThis field flattener and focal reducer package is for the Explore 152 or 127 Triplets with 3" focusers. Flattens the field beautifully and reduces effective focal length by 0.7X. 55 mm of back focus from rear flange. Includes 3" adapter and M42 photo adapter. Optional adapters available for 2.5" HEX focuser & 2" focuser.

WebMay 12, 2024 · Petzval design vs Triplet with a flattener - posted in Refractors : I am looking for a quality refractor with a focal length in the range of 500mm to 700mm. One … headlights cover cleaningWebSep 30, 2012 · I have the AT130EDT with a FL of 910mm. I have added the Hotech 1x Field flattener to it which has a BF of 55mm. Things look alright on my small 533mc sensor and relatively flat, although I have not actually ran a measurement. Now when I let the ASIAir calculate my FL, it comes out either at 902 or 903mm with the field flattener, so it has … gold petite topWebOftentimes, a field flattener also has focal reducer capabilities, so you can get wider shots out of your scope. Be sure to check each field flattener we carry to see if you can use it … headlights cp0ee1038lsWebMay 12, 2024 · Petzval design vs Triplet with a flattener - posted in Refractors : I am looking for a quality refractor with a focal length in the range of 500mm to 700mm. One of the questions I have is what are the inherent advantages or disadvantages of these designs, if any. I am most familiar with Televue and Stellarvue and they both have scopes in that … headlights covers replacementWebJul 28, 2024 · It does need a flattener for best results. The dedicated flattener ceased being produced not long after the scopes came out - WO seem to have a habit of doing that. The dedicated flattener did flatten but it also made the scope a bit slower, something like f/6.2, instead of the f/5.9 or whatever it is. Imagers were a bit unhappy with that. gold petershausenWebThe non-reducer flattener's back focuse distance, T-Thread shoulder to the CCD chip, requirement is 55mm. SCA Damps Vibration The all-around adjustable tightness rubber contact damps unwanted vibrations from the telescope provides you a sturdy attachment on your telescope for a stable image capture. The 2" Field Flattener Accepts 2" Filter Thread headlight scpWebFeb 2, 2024 · If you add the f/6.3 focal reducer/field flattener to the rear port, you can stick with 1.25" eyepieces, and not convert the back end to 2" (saving money), There are a lot of nice inexpensive eyepieces that would serve you well. I recommend the 58-60° apparent field eyepiece that retail for $65-$95 each. headlights control