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We do not price match competitors if they are out of stock. Performance wise what differences might there be using the reducer on a smaller scope. The distances d1 andd2 can also be expressed in terms of the focal length of the focal reducer FR with the lens equation: Using Equation 2, Equation 1 can also be expressed in terms of d2: The focal reduction factor of the focal reducer depends on its focal length and its distance from the focal plane of the objective as shown by Equation 4: Again, for example, when the focal reducer is placed at the original focal plane of the objective, d1=0 and MR=1, which means there is no focal reduction. This focal reducer is made to attach to the rear cell of Schmidt-Cassegrain or Maksutov-Cassegrain telescopes. But when not in the box or on the telescope, there is no cover for the other end. The working distance or required back focus, explained above, is usually specified and is far more important in practice. 0.5X focal reducer for Celestron, Meade, and Orion CCD imaging cameras Never noticed any anomalies with this unit. I have the Japanese version and although I haven't used it in quite awhile, the views through it were superb with no internal reflections at all. Focal reducers also move the effective focal plane of the objective inward, that is, towards the objective (see Figure 1). WiFi technology encircles the globe in a web of connectivity, knowledge, and information. Regardless, the difference was miniscule and is more than adequate on both and exceeds a 8 or 6 SCTs baffle tube diameter. Sign up for a new account in our community. Celestrons FREE planetarium app is an astronomy suite that redefines how you experience the night sky. They never really recovered from selling a few 15 years back with element reversed. Quite interestingly it bears the very same engravings of the Meade 4000 r/c (including "series 4000") except for "MEADE". looks virtually identical, except for the lettering. I have/had both the Celestron (Japan) and Antares units. A little longer light path with a 2 Baader click-lock, low profile 1.25 adapter, and the 1.25 diagonal; Focal Reducer for SCT - ACF - Stargazers Lounge Celestron or Antares f/6.3 focal reducer for SCT? Some third-party vendors also make reducers for SCT scopes. Can you help me? Using this same example of an 8" SCT and a 0.63x reducer, a visual observer can also enjoy brighter images and a wider field of view. 2023 OPT Telescopes. 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. Weasner's Meade and Antares Focal Reducers Review GSO, for example, has a 0.75x reducer for RC scopes with a back focus of 80mm, which is usually enough room for a wide range of astronomy cameras and accessories and spacers as needed. Antares f/6.3 Focal Reducer for Schmidt-Cassegrain Telescopes - Agena Astro For example, with a 0.8x focal reducer, a telescope with a focal length of 800mm will operate at 800 x 0.8 = 640mm when the reducer is placed at the working distance specified by the manufacturer. Read our 101 article or get in touch. Powered by Invision Community. As per the OP I still can't see any reason to buy the Celestron for significantly more $$$. 2. . So Celestron buyers like Celestron, Meade buyers like the Meade and Antares buyer like the Antares. The focal length and design working distance for this focal reducer were not available from the manufacturer. Try & buy if you like - usual mates rates. The same illumination you have at the edge of a 27mm field, the C8 has at the edge of a 38mm field. More about this below. There are many different types of focal reducers and they all effect. . If used before or beyond the working distance, unwanted image distortion may result. Our patented SkyAlign alignment technology makes setting up a computerized telescope simple, fast, and accurate. However I've also read that the back focal distance on the Celestron is 105mm while the Antares is 81mm so they couldn't be identical. I really don't see any difference in the current crop except the "Meade" is usually the cheapest. Imaging - Focal Reducers and Flatteners - Page 1 - KW Telescope The reducer features fully coated optics in an anodized aluminum filter ring with an ergonomic rubber grip. The author finds differences in throughput and color balance, but then says he thinks the lenses are identical and he reaches his conclusions based on very long observing session. Like you, I am primarily visually observing but I have everything together now that so I am going to start experimenting with photography so we'll see how it does there. I'm going with the Celestron. Watch this before you buy Celestron 8SE SCT, or a Focal Reducer or a Hyperstar 7,758 views Mar 28, 2018 145 Dislike Share Ray's Astrophotography 42.3K subscribers Note: I am not paid or. I also used several eyepieces including the ES 24mm/68, 17.5mm and 12.5mm Morpheuses, and a 10.5mm Pentax XL. CPWI has an extensive object database, employs PointXP mount modeling, and more. Focal Reducers | Celestron Reducer Lens .7x - EdgeHD 1400 Learn More. I don't know. This is one of our best-selling items, and customers have reported that this product is at least as good as, and probably better than, other leading f/6.3 focal reducers sold on the market for a lot more. Reducer Lens .7x - EdgeHD 925 Learn More. Most Feather Touch focusers cost between $300-$350. Focal reducers for many SCTs and their flat-field equivalents usually have a back-focus distance of 105mm. Sign up for our newsletter to get exclusive deals, observing tips, and new product announcements. Looking forward to the day when I can do a shoot-out between a Japan and China Celestron, just for kicks. Normal shipments will resume on Monday, March 6, 2023. nleash the full pointing accuracy of your Celestron computerized telescope with a specialized telescope control software suite. Fastar Technology allows imagers the option of drastically increasing the speed and sensitivity of their Celestron optical tube, allowing bright, detailed images with short exposures. [email protected]. I focus using a moonlight electronic focuser and focusmax. For this shoot-out, I used a standard Celestron C8 with Starbright coatings. because they really dont matter. Stars in the corner of the image frame are indistinguishable between the Antares and the Celestron. A reducer is a set of converging (or positive) lenses that cause the light from a telescope objective to converge at a steeper angle to the focal plane as if it were coming from an objective with a faster (lower) focal ratio and a shorter focal length. Some refractors such the TeleVue Nagler-Petzval (NP), the Takahashi "FSQ", and the William Optics Redcat/WhiteCat 51 have inherently flat fields because of internal optical elements. You cannot, for example, use a 0.63x focal reducer intended for a standard Celestron or Meade SCT and use it on a Celestron Edge HD or a Meade ACF. The reducer fits all Meade and Celestron . Nowadays I tend to use the Celestron more with my refractors for imaging and viewing. In terms of reduction and correction - which are what reducer/correctors are supposed to do - both are superb. But is there a difference in quality between the Antares and the Celestron or Meade focal reducers? Keep in mind that these differences were very subtle, and could be due to normal variations in coatings among different runs, and not necessarily unique to the brands. You also wont be unhappy spending the few extra bucks on the Celestron for the pretty orange lettering, particularly if you can pick one up used, as I did. Focal reducers are essential optical accessories for astrophotography, electronically-assisted astronomy (EAA), and in some cases, for visual observation with long focal ratio telescopes. Is that distance D= Fo-d1=Fo-(d2/MR)? a Tele Vue Panoptic), or a Plossl eyepiece with an apparent field of view of 50 and a focal length of 32mm. Focal Reducer, 2", 0.7X. The two samples I have PERFORM IDENTICALLY. In every configuration, there were essentially parfocal, requiring only a tiny fine focus adjustment when changing correctors. control and Sky Viewer display makes selecting your target easy. It is recommended for . The Celestron is both a corrector and focal reducer and the Antares is just a focal reducer. Hence, there is a chance that you may not be able to thread your SCT diagonal or other SCT accessory on to this reducer for these or for any other brand. If I had to chose one, I would base my decision on your level of light pollution perhaps the Antares for its slightly higher transmission if you live under less light polluted skies, but the Celestron for its greater contrast if you are dealing with a suburban or urban light dome. Images made with my ZWO 533 camera testing both show them to be essentially the same. If used with other f/ratios, the field flattening characteristic may be unpredictable. High power views will provide flatter fields all the way to the edge, both visually and photographically. Torazz Overall, this reducer does a phenomenal job at preventing gradients due to internal reflections from the camera sensor back to the glass in the reducer, as I suffered with the Antares reducer. However, the China 6.3 R/C has noticeable internal reflections that I haven't figured out yet. Please let us know what topics you are interested in. Some are available in 1.25" barrel format but with C threads. With the Celestron Reducer/Corrector Lens, thats precisely what you get. The most commonly available focal reducers for SCTs are the f/6.3 reducers from Celestron and a similar f/6.3 focal reducer from Meade. 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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. Stock focusers in an SCT move the mirror of the scope to change the position of the focal plane, and they have sufficient travel to accommodate a focal reducer. Sky recognition technology that has revolutionized the manual telescope by eliminating the confusion common among beginners and enhancing the user experience for even seasoned telescope users. Celestron or Antares? Scope size might influence choice as well, as a C6 might benefit from the Antares' transparency, while larger scopes might benefit from the Celestron's higher contrast.