f/11 telescopes, such as the C14 will perform at f/7. We provide manual and fully automated options. For visual use with the 8" LX200-ACF, the Antares focal reducer can be effectively used on large and/or faint objects. Because of the mixed messages about Celestron's F6.3 reducer for visual use (I am not . Made in Canada, this excellent optic has a CNC machined aluminium cell with a . . Celestron doesn't offer a f/6.3 Schmidt-Cassegrain telescope, because the design is impractical, with a large central obstruction, and resulting loss in contrast. Add to Cart. Reduce your exposure times by a factor of 3! Focal Length. Because the CCD camera has to store up the faint light . Focal Reducers Guiders Imaging Adapters & T-Rings Imaging Filters & Filter Wheels . The 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 the edge of the field when the scope is sharply focused at the center . $225. The female end attaches to the rear cell of the telescope. The Reducer/Field Flattener offers a wider field of view through your system, working to decrease the focal length of your system The new Hungarian designed SkyWatcher coma corrector has 4 lenses and optimased for extremly short Newton telescopes F5 Coma corrector More back travel is often needed for short-range terrestrial viewing or with use . Orion XT12i 12" f/4.9 Dobsonian Intelliscope. Back-focus: 95 mm (55 mm with spacer and M48 ring installed) Add filters to the Esprit Focal Reducer with the built-in 2" filter cell. This, added to the inability to utilize longer focal ratios for certain objects, led Celestron to design the four-element, fully multicoated f/6.3 Reducer/Corrector. Need a wider field or less magnification, use a longer eyepiece. The Antares 0.5x reducer has a focal length of -160mm and needs to sit 80mm in front of the focal plane for 0.5x reduction. This Esprit 120 focal reducer and field flattener reduces the focal ratio from the native f/7 to f/5.4. This is the typical separation between eyepiece and nose of a 2" diagonal - OR a typical straight filter wheel / webcam setup etc. $429.00. Astromania Portable Digital Night Vision Monocular New Optics Records Video Image with Micro Sd Card. Performance is similar on other size telescopes. If you want to use them for visual - try maybe long focal length eyepieces rather than the reducer. The exact focal length of the reducer/telescope combo depends slightly on where in the optical path the SCT Corrector lens is placed. Orion Astroview 120ST f/5 Refractor on EQ3 mount. The use of focal reducers can also be affected when using an external focuser. The Schmidt Cassegrain Telescope (SCT) is a hybrid optical design termed catadioptric. The common focal reducers on the market are primarily intended for imaging, not visual. Best regards, Tel Hi, Does anyone know if the Antares 4000 focal reducer is as good as the Celestron focal reducer. The Antares f6.3 focal reducer screws directly to the visual-back thread of all popular SCTs and converts f10 instruments to f6.3. For those wanting to get to f/4 and still be able to use a diagonal, the 1.25" Deluxe Adapter is replaced with the MFR -3 Focal Reducer and one 10MM Extension Ring. The lens replaces the secondary mirror on Fastar-compatible 11" SCTs and turns the telescope into an f/1.9 imaging system! This Celestron EdgeHD 0.7x focal reducer is a 4-element lens system that converts your 8" f/10 EdgeHD scope or optical tube into a fast f/7 (1422mm focal length) optical system. A CCD camera can take snapshots of the Moon and planets and long exposure photos of deep sky nebulas, galaxies, and star clusters. Use of this focal reducer effectively halves the focal ratio of your telescope, resulting in a wider field of view and significantly shortened . The lens has a female 1.25" eyepiece filter thread and can be attached to camera and eyepiece nose barrels to achieve a 40% increase in field of view. Delivers a 22mm diameter image without vignetting and can also provide well-corrected images up to 28mm with only minor light fall-off. A manufacturer of premium of traditional Crayford style focusers and Worm drive 2 axis rotating focusers. $449.95. OPT Product Number: AE-SCTFR specifications Warranty 2 Year Warranty Anonymous Great value Works as advertised This focal reducer and field flattener consists of a four-element multicoated 40mm lens in a metal cell. The Antares f/6.3 Focal Reducer for Schmidt-Cassegrain Telescopes is a low-price option for reducing the focal length of your Schmidt-Cassegrain telescope from f/10 to f/6.3. The advantages and features of the Starizona SCT 0.63x corrector: Focal length reduced to 0.63x. The HyperStar 11 system allows extremely fast, wide-field CCD imaging with the Celestron 11" SCT. Celestron's 9.25-inch 0.7x EdgeHD Focal Reducer makes the 9.25-inch Edge HD OTA even more versatile than ever, this reducer dramatically increases your field-of-view while also increasing the brightness of your image whether you're using it for visual use or astrophotography.. Celestron C14SCT OTA - CGE. This superb 0.5x focal reducer has been designed to be used with a wide range of modern CCD cameras and eyepieces. It holds the focal reducer glass in place (where it always has been) very well. This focal reducer is made to attach to the rear cell of Schmidt-Cassegrain or Maksutov-Cassegrain telescopes. Antares, Alstar, and other f/6.3 reducers are manufactured on the same production line and just branded after-the-fact . 90.3 mm working distance. Flat fielding is recommended for the best results. It will be hard to get it to good fast f/ratio and provide DSLR in size corrected cone of light. The female end attaches to the rear cell of the telescope. The reducer fits all Meade and Celestron SCTs as well as a wide range of other brands that utilise the same rear cell thread fitting. Inside the box is a "bottle" style case and a two-sided instruction sheet. This focal reducer from Celestron reduces the effective focal length by 0.63X. Adding the focal reducer drops exposure time by 65% compared to the native f/7. Also, be aware most focal reducers will often vignette low-power widefield eyepieces, I just put in the new spacer, put in the focal reducer glass, and then tightened down the lock ring. MFR-3. $429.00. The scope's incredibly fast f/2.2 focal ratio gathers so much light so quickly that even modest amounts of sky glow at a dark sky site can brighten the sky background and reduce the contrast in your images. Learn More. Mount it to your telescope with any 54mm bracket. You can look at Intes corrector/reducers, SCT reducer/corrector will work to some extent but in general - Mak will have to stay relatively slow if you want good field quality. 15% OFF. The 203mm aperture, f/10, SCT weighs less than 13 pounds (6 kg), and it can be accommodated by many medium-duty alt-azimuth and equatorial mounts, some of which will permit "grab-and-go" capability. An f/11 scope, such as the 14" Celestron CG-14, becomes an f/7. Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount. Adding the focal reducer drops exposure time by 65% compared to the native f/7. Optec Lepus 0.62x Reducer. Edited August 14, 2020 by lhm4000 Basically the lens has the effect of reducing the focal length of the telescope . Meade once made an f/3.3 focal reducer for SCT scopes. Using a Celestron or Meade f/6.3 Focal Reducer, as shown below, an f/10 SCT acts at f/6.3. For both imaging and visual observing, these reducers also improve image sharpness at the edge of the field by correcting for coma and field curvature. Meade f/6.3 Series 4000 Focal Reducer/Field Flattener - $129.95 (Made in China) Antares f/6.3 SCT Reducer/Corrector - $99.95 (Made in Canada) Meade f/6.3 Series 4000 Focal Reducer/Field Flattener The Meade focal reducer comes in a small box. The Antares, Celestron and the Meade f/6.3 focal reducers / field flatteners are, to my knowledge, one and the same product merely commercially "logo-ed" applicable to the above supplying companies. The Starizona 0.63x SCT reducer and corrector is a phenomenal piece of equipment for demanding tasks on SCTs, such as deep sky astrophotography with large total integration times. Among the available 2" diameter focal reducers Mallincam has a number of designs available for purchase, and the two Meade SCT based focal reducers are still available in various forms (ie. The Reducer/Corrector is easy to install by threading the unit onto the rear cell of your Schmidt-Cassegrain telescope (or the reducer plate of the C11 and C14). $110.70. After some testing I've discovered it works quite well for reducing the focal length and lowering the focal ratio of my 90mm Maksutov. The Meade LX200 telescopes have been a dream scope for many and for good reason. I'm no expert in optics so perhaps others might chip in here with their opinions ? StarBright XLT coated optics housed in a lightweight aluminum tube round out this popular design. Posted December 12, 2014. $429.00. I have a 0.63 focal reducer/corrector that fixes spherical aberrations along the edge of the field of view and also makes the instrument faster- f/6.3 and focal length then becomes 2560mm (1280*2) with the 4/3 camera. . This super premium zoom eyepiece has a focal length of 8mm to 24mm. I have found that threading the reducer directly onto an eyepiece works well. All additional accessories mount onto the exterior/male threads. An f/11 scope, such as the 14" Celestron CG-14, becomes an f/7. The Celestron reducer increases your photographic field of view by 43% to better capture wide field images and cuts your deep space exposure times in half, all the . . One Left in Stock. Posted December 14, 2011. Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes. Reduce your exposure times by a factor of 3! The Celestron f/6.3 Reducer has four fully-multicoated elements. This report summarizes the results of testing using a large variety of different focal reducers with a View All Close. Likewise, an f/10 Schmidt-Cassegrain with a 0.63X focal-reducer acts as an f/6.3 optical system. TestingXperts advanced Mobile Test Lab, extensive expertise in mobile testing engagements, and breadth of experience in the right tools ensure scalable and robust apps at cost-effective prices. FEATURES OF THE CELESTRON 9.25 EDGEHD FOCAL REDUCER AT A GLANCE. Unlike generic reducers, this premium reducer provides substantial back focus (105 mm) to accommodate an assortment of imaging accessories. The Celestron f/6.3 is ~150 compared to the Antares at ~70. For imaging, focal ratio is particularly critical. Posted October 11, 2010 They are reported as identical. Antares' f/6.3 focal reducer provides a faster f/6.3 system for imaging or visual use when used with an f/10 SCT or other compatible telescopes. Open clusters tend to be larger and spread out, . Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes. that accepts standard 1.25" threaded filters and provides a nominal reduction of 0.5x. - Jon from Aurora, CO Celestron C9.25 f/10 2350mm f/l SCT with Celestron 0.63x Focal Reducer/Field Flattener (f/6.3 1480mm f/l) on an Orion Sirius Pro AZ/EQ-G mount Celestron NexStar 127SLT f/12 5-inch 1540mm f/l Mak with Orion ST-80 f/5 3.1-inch 400mm f/l refractor mounted as a wide-field scope Explore Scientific AR152 f/6.5 988mm f/l achromatic refractor mounted on the Orion Sirius Pro as well Reducer Lens .7x - EdgeHD 925. To calculate how much back focus spacing you need to add, take the thickness of the filter and divide it by 3. The modern SCT is a popular telescope design due to it's compact size vs aperture. Add to cart. . Antares F6.3 focal Reducer for SCT The Antares SCTFR is the standard thread-on F/6.3 4-element fully multicoated reducer . Reduces the telescope's focal ratio by a factor of 0.63: f/10 . 4-element optical layout designed specifically . 27 mm illumination at optimal correction. Experience high-contrast viewing with minimal chromatic aberration with the EdgeHD 800 Offering . Accepting 1.25" accessories, the focusable VS60F makes it a correct image finder, but it can also be used as a guider or rich-field telescope. Critics of the Schmidt-Cass design tend to downgrade the C8 for producing "soft . Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives. Lesson here, if you're shopping for a Focal Reducer on Amazon, stay away from Meade, Astromania and Alstar and just get the Celestron. It's an excellent zoom eyepiece that performs superbly, with fully multicoated surfaces. Sale. The diagram above shows how the SCT Corrector improves the off-axis spot size on a Celestron 11" SCT. A 10" f/4.7 with a Paracorr is effectively a 10" f/5.4. Designed for Midsize CCD's and DSLRs. f/11 telescopes, such as the C14 will perform at f/7. Once installed, you can add additional accessories like T-Adapters, 1.25" Visual Back, Star Diagonal, or Off-Axis Guider. Dec 6, 2016 #1 I've very recently obtained an Antares 0.5 FR1 0.5X Focal Reducer. It reduces the effective focal ratio of a Schmidt-Cassegrain scope from F/10 to F/6.3. This Celestron EdgeHD 0.7x focal reducer is a 4-element lens system that converts your 8" f/10 EdgeHD scope or optical tube into a fast f/7 (1422mm focal length) optical system. This Esprit 120 focal reducer and field flattener reduces the focal ratio from the native f/7 to f/5.4. The Celestron f/6.3 Reducer has four fully-multicoated elements. Antares' popular 1.25" 0.5x focal reducer screws on to any accessory such as eyepieces, camera adapters, etc. Reg. The 60mm Versascope 60 auxillary telescope can do a lot of things. Any comments gratefully received. The Celestron EdgeHD 800 .7X Focal Reducer features a custom 4-element optical design engineered to maintain the flat-field performance of the EdgeHD optics. Celestron 8 - 24mm Zoom Eyepiece 1.25" 85.00. It threads onto the rear cell of 5" to 16" Celestron and Meade Schmidt-Cassegrain telescopes, making it possible to have a dual focal ratio instrument without sacrificing image quality. The EdgeHD .7x Focal Reducer Lens makes your EdgeHD 9.25" one full F-Stop faster than f/10, reducing your exposure time by half to capture the same brightness of object. - Read. The EdgeHD .7x Focal Reducer Lens makes your EdgeHD 800 one full f-stop faster than f/10, doubling the equivalent exposure at f/10. This focal reducer from Celestron reduces the effective focal length by 0.63X. Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount. [note: Around 2006-2010 Meade manufactured some f/6.3 focal reducers with a focal length of around half what they should be making them unsuitable for use with SLR cameras or filter wheels, any marked "Japan" are OK, as are later "China" ones.] The 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 the edge of the field when the scope is sharply focused at the center . Here, we review the Celestron C8 XLT Schmidt-Cassegrain. A Televue Paracorr increases your telescope's effective focal length (and, thus, f-ratio) by 15%. This should not change any characteristic of the reducer since the glass is still in the same location in the housing. Suitable for all Schmidt-Cassegrain telescopes from Celestron and Meade. Apex ED 0.65x Reducer / Flattener. The Meade/Celestron focal reducers have the following focal lengths. An important advancement in high-resolution focal reduction systems, the Meade 4-element, multi-coated f/6.3 Focal Reducer/Field Flattener threads on to the rear cell of any LX90, LX200 or other Schmidt-Cassegrain model and is typically used with an Off-Axis Guider or T-Adapter.