antares vs celestron focal reducer

JavaScript seems to be disabled in your browser. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions. When placed in the focal plane in front of a camera or eyepiece, a focal reducer leads to a wider field of view and a brighter image of extended objects, which is important for reducing the exposure times when imaging faint extended objects like nebulae or galaxies. Nowadays I tend to use the Celestron more with my refractors for imaging and viewing. I happily cycle through LRGB filters to build the image rather than do a whole run of one filter at a time. Does anyone have any experience with the Celestron and Antares focal reducers? How does it look thats what matters. Better images are also obtained when using these focal reducers at a reduction factor of 0.5x 0.8x, approximately. If yes, what kind of focal reducers can I use? I am a purely visual observer, so will evaluate for visual use only. Fortunately, my neighbors are not out in their backyards at 11 pm, or they may have thought I was torturing a small mammal. EclipSmart solar products feature Solar Safe filter technology providing the ultimate protection from harmful solar radiation, including both IR and UV light, and filters 99.999% of visible light. With this telescope and this focal reducer, it does not help to move to a 2" eyepiece and a 2" diagonal as the visual view will be akin to looking through a porthole within the larger apparent field of view of the eyepiece. My application is mostly visual now, but I'm looking to do more astrophotography over time. Obviously bright objects like Jupiter or The Moon show the reflections. Sign up for OPT news, exclusive offers, and updates on the latest gear! Figure 2 shows the effective of a focal reducer on the light from a telescope objective. 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. Most Feather Touch focusers cost between $300-$350. 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. And, the reality is that every F/6.3 RC out there Celestron, Hirsch, Astromania, etc., etc. . They both are great and I doubt my eyes could detect a difference in any one of them including the Japan version. He received his first telescope at the age of 5 and completed his first university course in astronomy at the age of 12, eventually receiving a master's degree in the subject. control and Sky Viewer display makes selecting your target easy. I have a made in Japan 6.3 R/C and a made in China 6.3 R/C. The same illumination you have at the edge of a 27mm field, the C8 has at the edge of a 38mm field. Thanks guys, appreciate the feedback. If the reducer is placed closer to the eyepiece or camera than the distance D, the reduction factor decreases. Celestron Nexstar+ 127 SLT, several budget plossl eyepieces, Celestron 8-24mm zoom EP and a 12.5mm illuminated double reticle EP, Svbony SV205 camera w/.5 focal reducer, Celestron SkyMaster 20x80 binos on a 40 yr old QuickSet PanHead tripod, Stellarium, Sharpcap and ManyCam on my laptop, SkyView and Nightshift on my phone and a dandy little $9 . Style: Such an image circle is still large enough to encompass the relatively large sensor of many deep-sky astronomy cameras. When you said, "in some cases" a focal reducer also works as a flattener/corrector, are you saying that not all focal reducers are flatteners/corrector? 160K views 9 years ago This video is a complete overview of focal reducers and how they function applying to telescopes. I doubt there is any difference between the Antares and the Celestron except price. I own both and concur heartily. A useful thing to know is how far from the objective lens (for a refractor) is the focal reducer located. This telescope control software replaces the hand control and allows the user to remotely control their Celestron computerized telescope from their personal PC or laptop. Whereas the Celestron threaded smoothly onto the scope, the Antares chattered and squeaked a bit more so when being removed. Focal reducers for SCT, RC, and field-flattened Edge HD or ACF telescopes thread onto the back of the telescope tube with 2"-24 or 3"-28 SCT threads. Focal reducers are essential optical accessories for astrophotography, electronically-assisted astronomy (EAA), and in some cases, for visual observation with long focal ratio telescopes. I have/had both the Celestron (Japan) and Antares units. There is a way to make subjective data more useful and that way is proper blind, or better still. Figure 7 shows an example of an image of the Dumbbell Nebula taken with a 1.25" GSO focal reducer at a reduction factor of 0.63x with an 85mm f/7 refractor and a QHY5III-290M camera with a sensor with a 6.4mm diagonal. To test this, I used three set-ups: 1. All Rights Reserved. USD $80.00. Looking forward to the day when I can do a shoot-out between a Japan and China Celestron, just for kicks. Celestron Focus Motor for SCT, EdgeHD & 8" RASA, Celestron C6 0.63 reducer/flattener back focus. Meade once made an f/3.3 focal reducer for SCT scopes. Theoretically each of these combinations all varied-length light paths should have resulted in slightly different reductions between the Celestron and Antares, since they supposedly have different focal lengths. So, this past week I challenged the Antares and Celestron models to a head-to-hear on my C8 on some decent nights of good seeing and transparency in my Bortle 5-6 urban skies. However, even though the imprint on the item states "Reducer / Corrector" please note that his is a reducer only. Figure 1 shows the relationship between the focal reduction factor MR and the position of the reducer in the optical path. The Reducer/Corrector can also be used for terrestrial digiscoping. With the barrel 1.25 reducer won't focus, all I get is fuzzy snowballs. This is the simplest way to attach your ASI121 to your telescope. Completely stuck, completely frustrated. Reducer - Corrector The focus barely shifts between filters and I suspect any shifts I do get are down to the filters and changes in temp. Read our guide! Some third-party vendors also make reducers for SCT scopes. Turn it on and push Align. In about three minutes, youre ready to observe! They are also less expensive than many external focusers of similar build quality. The click-lock with a 2 dielectric diagonal with a somewhat shorter light path, using both a 2 ES 28mm/68 and the same low-profile adapter with a 1.25 ES 24mm/68. Thanks for any advice or experience you could share. As often noted in reviews and forum threads, Antares products tend to have threads that are a little less precise, and this specimen certainly demonstrated this. Opticstar F6.3 Focal Reducer / Corrector. If the reducer is placed elsewhere, at a position called the operating distance, the focal reduction factor will not be as advertised. 3. Focal Reducers | Celestron Orders placed over the weekend will be shipped on the following Monday. Assuming you use the reducer with the stock 1.25" diagonal, it will operate at f/6.3. Celestron or Antares? I think I remember hearing the reduction factor is slightly different, cant remember more or less reduction. and you will be fine. 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). What is likely is that fatigue sets in, and also that as the targets move toward or a way from the meridian there will be changes for that reason alone. This focal reducer and field flattener consists of a four-element multicoated 40mm lens in a metal cell. These RC reducers cannot be used with other types of telescopes. The equations and argument in the Appendix of this article shows the relationship between the working distance and the reduction factor. However, this also came at a cost, as the sky background in the Antares was slightly brighter. Most manufacturers provide this specification. Now It only focuses near things, like some kind of macro zoom. Steve The Antares FR2-0.7X is the same 4-element f/6.3 lens system used for f/10 Schmidt-Cassegrain telescopes but in a 2" barrel threaded for standard filters. Contiguous US Customers:All items we sell ship for free within the Contiguous US. There is one difference though the Antares came with only one lens cap whereas the Celestron had a cap for both ends. No rainchecks will be issued for items out of stock at OPTcorp.com to match a competitor's price. Please re-enable javascript to access full functionality. It's usually specified in millimeters. Your eyepieces are the first accessories you should learn to use with your telescope. That was fun. However, in principle, the reduction factor of a focal reducer can be varied by changing the distance from the back of the focal reducer to the camera or eyepiece. Both exhibited consistent reduction, identical field flattening, and edge correction properties, and both were high quality optically and mechanically. Imagine having two telescopes in one a long focal length instrument for lunar and planetary work and a short focal length scope for deep sky observing and astrophotography. Our patented SkyAlign alignment technology makes setting up a computerized telescope simple, fast, and accurate. Celestron Reducer Lens .7x - EdgeHD 925 The EdgeHD .7x Focal Reducer Lens makes your EdgeHD 925 one full F-Stop faster than f/10, reducing your exposure time by half to capture the same brightness of object 5-element lens design Maintains similar. The most significant mechanical variation, however, is the quality and precision of the threading. Sharpness is essentially the same. Can you help me? Upon close inspection, it was clear that the housing of Antares assembled in Canada version was a little more substantial than the Celestron. There are many different types of focal reducers and they all effect. This means that there must be sufficient travel on the telescope focuser to make up for this. Place the plastic covers on the lens when not in use to reduce the dust collection. The equations in the Appendix show how this all works. Here, there was a subtle difference . I don't know. No idea what the issue is. These scopes are compatibles with focal reducers. Many reducers, such as the Celestron HD focal reducer mentioned above, and many focal reducers for apochromatic refractors, are meant to be used within a few millimeters (or less) of the specified working distance to achieve the best possible image results. I've seen some older threads saying that the Celestron, Meade and Antares FRs are all the same and manufactured in the same factory. Perhaps not exactly- there will be some uncertainty because of manufacturing tolerances and so forth, but it will be close. 2023 Celestron, LLC. But when not in the box or on the telescope, there is no cover for the other end. Since the Celestron and Antares are supposed to have different focal lengths and spacing specs, I expected different results. CPWI has an extensive object database, employs PointXP mount modeling, and more. This appendix summarizes how this works based on simple equations from the book Telescope Optics by Rutten and van Venrooij.

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