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 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. Hi, Does anyone know if the Antares 4000 focal reducer is as good as the Celestron focal reducer. . The Meade LX200 telescopes have been a dream scope for many and for good reason. StarBright XLT coated optics housed in a lightweight aluminum tube round out this popular design. Once installed, you can add additional accessories like T-Adapters, 1.25" Visual Back, Star Diagonal, or Off-Axis Guider. A manufacturer of premium of traditional Crayford style focusers and Worm drive 2 axis rotating focusers. 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.. Reduce your exposure times by a factor of 3! used, or Antares/Celestron versions). Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes. Celestron Reducer Lens .7x - EdgeHD 925. The Schmidt Cassegrain Telescope (SCT) is a hybrid optical design termed catadioptric. This "speeds up" the optical train by reducing the focal length and magnification of the scope, requiring less time to integrate the same signal. Reg. Inside the box is a "bottle" style case and a two-sided instruction sheet. An f/11 scope, such as the 14" Celestron CG-14, becomes an f/7. Also, be aware most focal reducers will often vignette low-power widefield eyepieces, 4-element optical layout designed specifically . 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. ♦ Suitable for all Schmidt-Cassegrain telescopes from Celestron and Meade. 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. It reduces the effective focal ratio of a Schmidt-Cassegrain scope from F/10 to F/6.3. Orion Astroview 120ST f/5 Refractor on EQ3 mount. 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. Reg. Sale. 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. Celestron 8 - 24mm Zoom Eyepiece 1.25" £85.00. This is the typical separation between eyepiece and nose of a 2" diagonal - OR a typical straight filter wheel / webcam setup etc. View All Close. This focal reducer from Celestron reduces the effective focal length by 0.63X. 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 . . . Yes, using filters of any kind in your imaging train will alter your back focus slightly. ♦ 27 mm illumination at optimal correction. 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 Celestron EdgeHD 800 .7X Focal Reducer features a custom 4-element optical design engineered to maintain the flat-field performance of the EdgeHD optics. Use of this focal reducer effectively halves the focal ratio of your telescope, resulting in a wider field of view and significantly shortened . Share. 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. Dec 6, 2016 #1 I've very recently obtained an Antares 0.5 FR1 0.5X Focal Reducer. Optically, it consists of a four-element lens that is fully multi-coated for high contrast and resolution. 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. 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. 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. Reduce your exposure times by a factor of 3! $131.10. This superb 0.5x focal reducer has been designed to be used with a wide range of modern CCD cameras and eyepieces. I'm no expert in optics so perhaps others might chip in here with their opinions ? 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. These reducers can also be used for visual observing with SCT scopes with eyepieces with a field stop as large as 24-27mm. The diagram above shows how the SCT Corrector improves the off-axis spot size on a Celestron 11" SCT. 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). Meade once made an f/3.3 focal reducer for SCT scopes. $429.00. A Televue Paracorr increases your telescope's effective focal length (and, thus, f-ratio) by 15%. $449.95. 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 . 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. 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 female end attaches to the rear cell of the telescope. A CCD camera can take snapshots of the Moon and planets and long exposure photos of deep sky nebulas, galaxies, and star clusters. Remove the twist-lock feature and it's a camera lens with T2 thread. Posted December 12, 2014. 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, . $110.70. I just put in the new spacer, put in the focal reducer glass, and then tightened down the lock ring. Celestron C14SCT OTA - CGE. Because the CCD camera has to store up the faint light . 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. Because of the mixed messages about Celestron's F6.3 reducer for visual use (I am not . The female end attaches to the rear cell of the telescope. 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. Experience high-contrast viewing with minimal chromatic aberration with the EdgeHD 800 Offering . Need a wider field or less magnification, use a longer eyepiece. This focal reducer is made to attach to the rear cell of Schmidt-Cassegrain or Maksutov-Cassegrain telescopes. $181.99. Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives. It's an excellent zoom eyepiece that performs superbly, with fully multicoated surfaces. Reducer Lens .7x - EdgeHD 925. Here, we review the Celestron C8 XLT Schmidt-Cassegrain. The Celestron f/6.3 is ~£150 compared to the Antares at ~£70. [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 . Lesson here, if you're shopping for a Focal Reducer on Amazon, stay away from Meade, Astromania and Alstar and just get the Celestron. $429.00. The use of focal reducers can also be affected when using an external focuser. Made in Canada, this excellent optic has a CNC machined aluminium cell with a . Putting a filter into the optical path always increases the back focus distance. 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. Apex ED 0.65x Reducer / Flattener. To calculate how much back focus spacing you need to add, take the thickness of the filter and divide it by 3. Delivers a 22mm diameter image without vignetting and can also provide well-corrected images up to 28mm with only minor light fall-off. $429.00. I have found that threading the reducer directly onto an eyepiece works well. Add to Cart. 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. This Esprit 120 focal reducer and field flattener reduces the focal ratio from the native f/7 to f/5.4. Basically the lens has the effect of reducing the focal length of the telescope . OPT Product Number: AE-SCTFR specifications Warranty 2 Year Warranty Anonymous Great value Works as advertised SKU : OP-19407. 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 should not change any characteristic of the reducer since the glass is still in the same location in the housing. 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 lens replaces the secondary mirror on Fastar-compatible 11" SCTs and turns the telescope into an f/1.9 imaging system! This filter threads on to the rear cell of your Celestron or Meade SCT telescope. 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. An f/11 scope, such as the 14" Celestron CG-14, becomes an f/7. Edited August 14, 2020 by lhm4000 Any comments gratefully received. 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 . One Left in Stock. It's an 8", f/10 telescope with an ACF optical system that provides a flatter field, no diffraction spikes, and . 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 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. All additional accessories mount onto the exterior/male threads. Using a Celestron or Meade f/6.3 Focal Reducer, as shown below, an f/10 SCT acts at f/6.3. Posted December 14, 2011. Focal Reducers Guiders Imaging Adapters & T-Rings Imaging Filters & Filter Wheels . This focal reducer from Celestron reduces the effective focal length by 0.63X. Astromania Stereo Bino Viewer with Two 32mm Plossl Eyepicecs-allow you to adapt two eyepieces to your telescope and view with both eyes simultaneously. Reduces the telescope's focal ratio by a factor of 0.63: f/10 . that accepts standard 1.25" threaded filters and provides a nominal reduction of 0.5x. The Celestron f/6.3 Reducer has four fully-multicoated elements. This super premium zoom eyepiece has a focal length of 8mm to 24mm. ♦ 90.3 mm working distance. Price Match Guarantee. The HyperStar 11 system allows extremely fast, wide-field CCD imaging with the Celestron 11" SCT. Enjoy the wider field of view & faster exposure times at f/6.3 with f/10 telescopes. So the Celestron f/6.3 focal reducer finally came in. f/11 telescopes, such as the C14 will perform at f/7. Posted October 11, 2010 They are reported as identical. 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 . Learn More. Focal Length. 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. Best regards, Tel 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. It will be hard to get it to good fast f/ratio and provide DSLR in size corrected cone of light. The Meade/Celestron focal reducers have the following focal lengths. Antares F6.3 focal Reducer for SCT The Antares SCTFR is the standard thread-on F/6.3 4-element fully multicoated reducer . Add to cart. The main reason here is that, for the most part, you control field of view/magnification through eyepiece selection. Performance is similar on other size telescopes. MFR-3. $225. 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. Astromania Portable Digital Night Vision Monocular New Optics Records Video Image with Micro Sd Card. 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 . f/11 telescopes, such as the C14 will perform at f/7. Flat fielding is recommended for the best results. 15% OFF. A 10" f/4.7 with a Paracorr is effectively a 10" f/5.4. ♦ 2" barrel size. Reducer Lens .7x - EdgeHD 925. - 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 Designed for Midsize CCD's and DSLRs. 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. At F/6.3 the effective focal length for an 8" SCT is 1260mm whereas it is 2000mm without the reducer. Optec Lepus 0.62x Reducer. We provide manual and fully automated options. 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. . This focal reducer and field flattener consists of a four-element multicoated 40mm lens in a metal cell. 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. For visual use with the 8" LX200-ACF, the Antares focal reducer can be effectively used on large and/or faint objects. 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. The 60mm Versascope 60 auxillary telescope can do a lot of things. For imaging, focal ratio is particularly critical. Adding the focal reducer drops exposure time by 65% compared to the native f/7. Adding the focal reducer drops exposure time by 65% compared to the native f/7. The Celestron #93617 RASA LPR (Imaging Filter is highly recommended with the RASA. 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. Celestron's award-winning Nature DX binocular gets a major upgrade with the addition of ED objective lenses. Mount it to your telescope with any 54mm bracket. $153.90. Likewise, an f/10 Schmidt-Cassegrain with a 0.63X focal-reducer acts as an f/6.3 optical system. - Read. Critics of the Schmidt-Cass design tend to downgrade the C8 for producing "soft . It looks pristine and brand new. Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount. The modern SCT is a popular telescope design due to it's compact size vs aperture.