StarBright XLT coated optics housed in a lightweight aluminum tube round out this popular design. . I'm no expert in optics so perhaps others might chip in here with their opinions ? Adding the focal reducer drops exposure time by 65% compared to the native f/7. 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 . The exact focal length of the reducer/telescope combo depends slightly on where in the optical path the SCT Corrector lens is placed. 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. Celestron C14SCT OTA - CGE. 27 mm illumination at optimal correction. All additional accessories mount onto the exterior/male threads. It reduces the effective focal ratio of a Schmidt-Cassegrain scope from F/10 to F/6.3. Using a Celestron or Meade f/6.3 Focal Reducer, as shown below, an f/10 SCT acts at f/6.3. Reg. 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. . 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.. Reducer Lens .7x - EdgeHD 925. A manufacturer of premium of traditional Crayford style focusers and Worm drive 2 axis rotating focusers. $131.10. Focal Length. A Televue Paracorr increases your telescope's effective focal length (and, thus, f-ratio) by 15%. Reduce your exposure times by a factor of 3! [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.] All of our products are made in house in the US and are designed and machined with state of the art machining and turning centers producing outstanding quality and finish. 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. OPT Product Number: AE-SCTFR specifications Warranty 2 Year Warranty Anonymous Great value Works as advertised Antares F6.3 focal Reducer for SCT The Antares SCTFR is the standard thread-on F/6.3 4-element fully multicoated reducer . - Read. Sale. 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. Need a wider field or less magnification, use a longer eyepiece. Here, we review the Celestron C8 XLT Schmidt-Cassegrain. Likewise, an f/10 Schmidt-Cassegrain with a 0.63X focal-reducer acts as an f/6.3 optical system. High Quality Zoom Eyepiece. The female end attaches to the rear cell of the telescope. This superb 0.5x focal reducer has been designed to be used with a wide range of modern CCD cameras and eyepieces. It looks pristine and brand new. Reg. . 15% OFF. Unlike generic reducers, this premium reducer provides substantial back focus (105 mm) to accommodate an assortment of imaging accessories. To calculate how much back focus spacing you need to add, take the thickness of the filter and divide it by 3. $429.00. Price Match Guarantee. The Meade/Celestron focal reducers have the following focal lengths. Learn More. This filter threads on to the rear cell of your Celestron or Meade SCT telescope. 2" barrel size. Posted October 11, 2010 They are reported as identical. 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). $429.00. A CCD camera is essentially an electronic version of a 35mm camera for astrophotography that saves the images in your computer, rather than on a roll of film. 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. Apex ED 0.65x Reducer / Flattener. Performance is similar on other size telescopes. - 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 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. Reducer Lens .7x - EdgeHD 925. 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. This focal reducer from Celestron reduces the effective focal length by 0.63X. used, or Antares/Celestron versions). The 60mm Versascope 60 auxillary telescope can do a lot of things. Orion XT12i 12" f/4.9 Dobsonian Intelliscope. 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 . The Celestron f/6.3 Reducer has four fully-multicoated elements. Refractors: Antares 105mm f/15 (modified), Celestron 150mm f/8 (modified), Homemade 70mm f/10 (LZOS K8/F8 doublet), Stellarvue NHNG Deluxe 80mm f/6.9, . This super premium zoom eyepiece has a focal length of 8mm to 24mm. Celestron's award-winning Nature DX binocular gets a major upgrade with the addition of ED objective lenses. This Esprit 120 focal reducer and field flattener reduces the focal ratio from the native f/7 to f/5.4. If you want to use them for visual - try maybe long focal length eyepieces rather than the reducer. 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. An f/11 scope, such as the 14" Celestron CG-14, becomes an f/7. Remove the twist-lock feature and it's a camera lens with T2 thread. This focal reducer is made to attach to the rear cell of Schmidt-Cassegrain or Maksutov-Cassegrain telescopes. Optically, it consists of a four-element lens that is fully multi-coated for high contrast and resolution. 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. Orion Astroview 120ST f/5 Refractor on EQ3 mount. that accepts standard 1.25" threaded filters and provides a nominal reduction of 0.5x. Edited August 14, 2020 by lhm4000 Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives. Optec Lepus 0.62x Reducer. Add to Cart. 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. 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. This focal reducer and field flattener consists of a four-element multicoated 40mm lens in a metal cell. $110.70. Antares' popular 1.25" 0.5x focal reducer screws on to any accessory such as eyepieces, camera adapters, etc. It is the finest zoom eyepiece for low to medium power observing. 90.3 mm working distance. 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. 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. The Celestron f/6.3 Reducer has four fully-multicoated elements. f/11 telescopes, such as the C14 will perform at f/7. Putting a filter into the optical path always increases the back focus distance. SKU : OP-19407. Focal Reducers Guiders Imaging Adapters & T-Rings Imaging Filters & Filter Wheels . The Antares f6.3 focal reducer screws directly to the visual-back thread of all popular SCTs and converts f10 instruments to f6.3. FEATURES OF THE CELESTRON 9.25 EDGEHD FOCAL REDUCER AT A GLANCE. A 10" f/4.7 with a Paracorr is effectively a 10" f/5.4. Use of this focal reducer effectively halves the focal ratio of your telescope, resulting in a wider field of view and significantly shortened . Open clusters tend to be larger and spread out, . Best regards, Tel The Celestron #93617 RASA LPR (Imaging Filter is highly recommended with the RASA. The use of focal reducers can also be affected when using an external focuser. The Meade LX200 telescopes have been a dream scope for many and for good reason. Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes. 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. Add to cart. We provide manual and fully automated options. Astromania Stereo Bino Viewer with Two 32mm Plossl Eyepicecs-allow you to adapt two eyepieces to your telescope and view with both eyes simultaneously. So the Celestron f/6.3 focal reducer finally came in. Dec 6, 2016 #1 I've very recently obtained an Antares 0.5 FR1 0.5X Focal Reducer. Also, be aware most focal reducers will often vignette low-power widefield eyepieces, For imaging, focal ratio is particularly critical. Yes, using filters of any kind in your imaging train will alter your back focus slightly. Because of the mixed messages about Celestron's F6.3 reducer for visual use (I am not . Because the CCD camera has to store up the faint light . Inside the box is a "bottle" style case and a two-sided instruction sheet. $153.90. 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. 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. Basically the lens has the effect of reducing the focal length of the telescope . The main reason here is that, for the most part, you control field of view/magnification through eyepiece selection. $181.99. The lens replaces the secondary mirror on Fastar-compatible 11" SCTs and turns the telescope into an f/1.9 imaging system! Reduces the telescope's focal ratio by a factor of 0.63: f/10 . 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 . This should not change any characteristic of the reducer since the glass is still in the same location in the housing. The female end attaches to the rear cell of the telescope. 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. After some testing I've discovered it works quite well for reducing the focal length and lowering the focal ratio of my 90mm Maksutov. Suitable for all Schmidt-Cassegrain telescopes from Celestron and Meade. Designed for Midsize CCD's and DSLRs. The modern SCT is a popular telescope design due to it's compact size vs aperture. Celestron 8 - 24mm Zoom Eyepiece 1.25" 85.00. 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. Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes. This report summarizes the results of testing using a large variety of different focal reducers with a f/11 telescopes, such as the C14 will perform at f/7. Reduce your exposure times by a factor of 3! MFR-3. 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 diagram above shows how the SCT Corrector improves the off-axis spot size on a Celestron 11" SCT. Antares, Alstar, and other f/6.3 reducers are manufactured on the same production line and just branded after-the-fact . Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount. Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount. Posted December 12, 2014. Hi, Does anyone know if the Antares 4000 focal reducer is as good as the Celestron focal reducer. Experience high-contrast viewing with minimal chromatic aberration with the EdgeHD 800 Offering . 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. Celestron Reducer Lens .7x - EdgeHD 925. Meade once made an f/3.3 focal reducer for SCT scopes. It's an 8", f/10 telescope with an ACF optical system that provides a flatter field, no diffraction spikes, and . . Made in Canada, this excellent optic has a CNC machined aluminium cell with a . It will be made a bit easier by using a focal reducer, but for now you can observe without one. Posted December 14, 2011. Lesson here, if you're shopping for a Focal Reducer on Amazon, stay away from Meade, Astromania and Alstar and just get the Celestron. I have found that threading the reducer directly onto an eyepiece works well. I just put in the new spacer, put in the focal reducer glass, and then tightened down the lock ring. This is the typical separation between eyepiece and nose of a 2" diagonal - OR a typical straight filter wheel / webcam setup etc. Adding the focal reducer drops exposure time by 65% compared to the native f/7. 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. Share. 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. It's an excellent zoom eyepiece that performs superbly, with fully multicoated surfaces. Delivers a 22mm diameter image without vignetting and can also provide well-corrected images up to 28mm with only minor light fall-off. It holds the focal reducer glass in place (where it always has been) very well. For visual use with the 8" LX200-ACF, the Antares focal reducer can be effectively used on large and/or faint objects. 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. $429.00. 4-element optical layout designed specifically . Flat fielding is recommended for the best results. Any comments gratefully received. These reducers can also be used for visual observing with SCT scopes with eyepieces with a field stop as large as 24-27mm. Astromania Portable Digital Night Vision Monocular New Optics Records Video Image with Micro Sd Card. This focal reducer from Celestron reduces the effective focal length by 0.63X. The 8 LX200 may be the smallest model, but its 8" aperture is large enough for those who are upgrading, and it provides the lightest weight. 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. One Left in Stock. For example, the commonly used 0.63x SCT focal reducer (offered by Meade, Celestron, and others) or the larger 0.7x Celestron EdgeHD reducer will not work optically with an external focuser because it cannot be placed at the required working distance in front of the . 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 . $449.95. It will be hard to get it to good fast f/ratio and provide DSLR in size corrected cone of light. It both decreases the focal length as with a standard reducer, while also flattening the field by eliminating the coma and other optical imperfections present with . 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. A CCD camera can take snapshots of the Moon and planets and long exposure photos of deep sky nebulas, galaxies, and star clusters. View All Close. 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. 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 "speeds up" the optical train by reducing the focal length and magnification of the scope, requiring less time to integrate the same signal. Critics of the Schmidt-Cass design tend to downgrade the C8 for producing "soft . 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. 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 . The HyperStar 11 system allows extremely fast, wide-field CCD imaging with the Celestron 11" SCT. $225. Once installed, you can add additional accessories like T-Adapters, 1.25" Visual Back, Star Diagonal, or Off-Axis Guider.