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September 25, 2017

antares focal reducer

This book is a unique collaboration of individuals world-renowned in their particular area and covers in detail each of the major sub-disciplines of astrophotography. nikon d40 slr self modded now unmodded However, the export of some items may be restricted outside the US due to size or manufacturer restrictions. Antares FR1 1.25-inch 0.5X Focal Reducer USPS First Class shipping is just $4 to anywhere in the continental USA. 0.85x Focal Reducer/Corrector for Evostar-80ED DS-PRO £210.00 £175.00 (ex. The female end attaches to the rear cell of the telescope. Both clusters were well visible in the center of the FOV. Has male 2" filter threads, does He achieves this through a series of worked examples and short project walk-throughs, detailing the equipment needed – starting with just a DSLR (digital single lens reflex) camera and tripod, and increasing in complexity as the book ... Both clusters were visible in the 26mm FOV. Subscribe to back in stock notification (requires account login), Blue Fireball 2" Spacer Ring with 0.25" Extension # S-2A, Blue Fireball 2" Spacer Ring with 0.75" Extension # S-2C, Blue Fireball 2" Spacer Ring with 0.5" Extension # S-2B. Focal reducers can be used either visually or photographically to decrease focal length and increase true field at the expense of some vignetting (dimming) at the edge of the field. Male and female SCT Schmidt threads. Image date: March 2, 2021. I got the Nikon DSLR adapter. I changed back to the Antares reducer with the 2" star diagonal. Visually, some reducer lenses also allow rich field viewing with medium focal length 1.25" eyepieces. The exact amount of focus travel required will depend on the optics and mechanics of your specific set-up (telescope, diagonal (if used), barlow/reducer, and eyepiece). It fits virtually every 2 inch accessory (with filter thread) and effectively halves the focal . Could not achieve a focus. The female end attaches to the rear cell of the telescope. Eyepieces used with a focal reducer yield lower-power views. This book offers a comprehensive introductory guide to "choosing and using" a series LXD55 or LXD75 computer-controlled ("goto") telescope, containing a wealth of useful information for both beginners and more advanced practical amateur ... VAT) Adapter to connect Planostar 1.0x Flattener to Altair 2.5" R&P Focuser 2014 Wave Series Telescopes £35.00 £ . Meade and Antares Focal Reducers Review Antares' 2" 0.7x focal reducer screws on to any accessory (such as eyepieces, camera adapters, etc.) Found inside – Page 389... 111 Autumn transit, 84 B 12x60, 159 15x70,40 15x70, 133, 160, 169, 182 20x50, 171,. Angular separation, 114 Animation, 102 Annular solar eclipse, 81, 358 Annulus, 358 Antares, 36, 56, 108, 109, 189, 359, 382 Antares 2x focal reducer ... OPT provided the two SCT Focal Reducers for this comparison. This is the third edition of Phil Harrington's popular and comprehensive guide to astronomical equipment, written for both new astronomers as well as experienced amateurs. Antares 0.63 focal reducer. 4-element and fully multicoated. This Focal Reducer is a great addition to any astrophotography set up as it can cut your exposure time down considerably! Ive used it two times now. Scope: TSAPO65Q with NPR-1073 0.8x Reducer. Fully coated optics, black anodized aluminum ring. This makes the telescope a "faster" system with a wider field of view and brighter objects, requiring shorter exposure times when doing astrophotography. This report is an initial comparison of the following focal reducers using the same visual and photographic tests on a Meade 8" LX90-ACF. Achieve shorter focal length . Here's the moon through the Antares reducer with the 2" star diagonal: I then combined the Meade focal reducer with the 2" diagonal: Again, the maximum elevation was about 75°. Use of this focal reducer effectively halves the focal ratio of your telescope, resulting in a wider field of view and significantly shortened . Varying the Reduction Factor of a Focal Reducer. Amateur astronomers of all skill levels are always contemplating their next telescope, and this book points the way to the most suitable instruments. This filter threads on to the rear cell of your Celestron or Meade SCT telescope. The solar system is made up by the sun and all the celestial bodies orbit it. This system is of special interest for the observing amateur. The Handbook of Practial Astronomy spans astronomy, education and computing. It also corrects for coma. The touchstone for contemporary stargazers. This classic, groundbreaking guide has been the go-to field guide for both beginning and experienced amateur astronomers for nearly 30 years. Apertura's focal reducer has a 2 element optical design with fully multi-coated optics. Changing AGC setting will require re-adjustment. All additional accessories mount onto the exterior/male threads. * Not a Retail Store * 16313 Arthur StreetCerritos, CA 90703, USA. There are no . Hence, the "working distance" of this specific reducer is 79mm, i.e., this reducer will provide a reduction of 0.5x when the center of its lens assembly is placed 79mm from the focal plane of the eyepiece or imaging device. Focal Reducer,2", 0.5X. The store will not work correctly in the case when cookies are disabled. Focal reducers can be used either visually or photographically to decrease focal length and increase true field at the expense of some vignetting (dimming) at the edge of the field. Binocular Viewer. You can tour the Moon from your own backyard with a small telescope or binoculars. This book will point you to the Sea of Tranquility (the landing spot for Apollo 11) and many other fascinating features you can spot on the Moon's surface. USD $30.00. Meade f/6.3 Series 4000 Focal Reducer/Field Flattener. Could you help me to know the correct backfocus I need to have right correction and reducer factor of 6.3? Captured using Sequence Generator Pro and processed using PixInsight. Availability: Item has been discontinued by Agena and we no longer carry this item. Focal Reducer, 2", 0.7X. Contiguous US Customers:All items we sell ship for free within the Contiguous US. Celestron Plossl 25mm. Finished in Adobe CC. Here's the moon through the Antares reducer with the Off-Axis Guider: I swapped to the Meade focal reducer and attached the Off-Axis Guider: Again the maximum elevation was about 60° and could be less, depending on the camera body attached. Description. The Antares focal reducer comes in small box. Last updated: 11 October 2008. This Antares 1.25" 0.5x focal reducer lens (tele-compressor) is used under the Orion brand name to thread into the nosepiece of Orion StarShoot Solar System cameras and StarShoot Deep Space Color Imaging Camera. The store will not work correctly in the case when cookies are disabled. 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 . Antares W70 15mm. Found inside – Page 7... Focal Reducer Antares 2 ° 0.7x Reducer Colestron 1 / 6.3 Focal Reducer Celestron Neximage Reducer Monde f / 6.3 Focal Reducer Meade f / 3.3 Focal Reducer E39.99 E45.00 £ 29.99 £ 49.99 £ 59.99 £ 89.99 £ 99.99 £ 109.99 £ 29.99 238.50 ... Description. Found a better shipped price? The reducer threads into the nosepiece of either StarShoot G3 camera to effectively reduce the focal length of the telescope by half. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. The only moon reference you'll need at the telescope! By using additional spacers or extension tubes (sold separately), you can vary the amount of reduction you obtain with this reducer as follows: Note that the use of any optical element like barlows and focal reducers changes the focus point of your telescope, requiring additional in-focus or out-focus travel. A look at the Antares .5x focal reducer to gather a full disc image on a 1/2" ccd. When used for astrophotography, it reduces exposure times by a factor of 3, with an actual field diameter of 1.5" at the film plane. With a 2" 50mm eyepiece, the central obstruction was just barely visible. Kevin Jackson. Shutter = Manual (x256 or x512) Start at 64 and slowly increase. Found inside – Page 52903... 31 , 0 * , 2004 / 09 / 01-2004 / 09 / 18 ] H55 Antares Obseratory , Charleston R. Holmes , 7616 NCR 1800E , Charleston , IL 61920 ... 0.30 - m f / 10 Schmidt - Cassegrain + CCD + f / 6.3 focal reducer USNO - B1.0 ( 12 , 5 , 0 * ... Use of this focal reducer effectively halves the focal ratio of your telescope, resulting in a wider field of view and significantly shortened exposure times for astrophotography. Designed for f10 SCT's, this focal reducer yields a f6.3 system. The f/11 C14 telescope becomes an f/7. I purchased both from OPT. Move it away and the reduction provided will decrease. PixInsight LE 1.0. I could reach a focus. All rights reserved. This book introduces readers to hydrogen as an essential energy carrier for use with renewable sources of primary energy. Members 54 posts Posted 25 February 2014 - 06:26 AM. Previously, SCT focal reducers were designed primarily for imaging or single eyepiece use, and lacked the necessary focal length and positioning flexibility to work with binocular viewers. Unlike the Meade and Antares focal reducers I used in the past, which thread onto the SCT port, the Lepus fits a 2" visual back or focus drawtube. The Audio Expert takes the intermediate to advanced recording engineer or audiophile and makes you an expert. The book goes far beyond merely explaining how audio "works. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. #SCET spacer (sold separately) allows spacing adjustment by 1/2" increments. The amateur hobby of humanity since the dawn of time and scientific study of celestial objects. I had the same eyepiece focus problem but again, sliding it slightly outward allowed it to focus. 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. Testing the Antares 0.5x Focal Reducer on the 9.25 inch Celestron EdgeHD. JavaScript seems to be disabled in your browser. Product Details. There was no restriction in the guide eyepiece field of view. This 0.5x focal reducer increases the area imaged by your StarShoot G3 or G4 camera by a factor of 4. Found inside – Page 230Close enough to make the finding easy, but not close enough to be lost in the glare of Antares. ... 6.24 Telescope: 7′′ Intes-Micro Mak-Cass with 0.67× focal reducer Focal Length: 1,206 mm F-ratio: f/6.7 Camera: QSI 583wsg Mono ... When used visually, they extend the field of view. For example, use of this reducer will convert an f/10 telescope into an f/5 scope. 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. ( Brand: ANTARES ), ( MPN: AE-SCTFR ), ( Country/Region of Manufacture: Canada ), ( UPC: Does not apply ) Review Sct Focal 2 Reducer Sctfr Threads ANTARES Schmidt AE-SCTFR F6.3. Double Magnification Power Celestron Omni Barlow Lens For 1.25inch Lens. Antares #SCTFR f6.3 Focal Reducer with 2" Schmidt Threads for SCT - CANADA ship. 1.25" Twist Lock Adapter for Meade ETX models with 34.5mm male threads. Focal reducers are very versatile accessories. Found inside – Page 115The occultation of Antares was also recorded with very good SNR , allowing a detailed study of the outer layers of this supergiant . ... K.K. A89-10559 # CCD observations of Comet Wilson at the ESO 1 - m telescope with a focal reducer . Use of this focal reducer effectively halves the focal ratio of your telescope, resulting in a wider field of view and significantly shortened . I use a qhy10 (aps-c sensor), OAG and Lodestar x2 for autoguiding. No distortion of the stars was seen at the edge of the field of view. Subscribe to back in stock notification (requires account login), Blue Fireball 1.25" Spacer Ring with 0.25" Extension # S-1A, Blue Fireball 1.25" Spacer Ring with 0.75" Extension # S-1C. The viewing on this night was excellent. recently I've bought a C8 and I've ordered an Antares f/6.3 focal reducer. Antares FR1 and FR2-0.5 are fully multicoated 25/95mm achromat and fit standard 1.25" and 2" filter threads I wish there was. Offers a wide field of view with Schmidt-Cassegrain telescopes and reduces exposure time by a factor of 3. Skip to the beginning of the images gallery. A telecompressor or focal reducer is an optical element which amateur astronomers use to reduce the focal length of a telescope. This superb fully multi-coated double-focal reducer takes advantage of the latest computer aided design techniques to achieve the highest standards of performance to dramatically increase the field of view (FOV) or imaging scale of your telescope regardless of brand or type. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.International Customers:Free shipping does not apply to international orders. JavaScript seems to be disabled in your browser. Mainly used for astrophotography, the telecompressor gives a wider angle of view, a sharper picture, and reduces the exposure time needed . Proof that it can be done is provided by the many amazing color astrophotographs taken by the author while following the steps laid out in this book. 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. With a 2000mm focal length f/10 telescope like a 8" SC or 8" ACF, both the Antares reducer and the Meade reducer yield a 1260mm focal length f/6.3 telescope. It can also be used with any other small chip CCD camera having a 1.25" nosepiece, such as the Celestron NexImage, Meade DSI, etc. MSRP $59.95 CAD . That is amazing. By using additional spacers or extension tubes (not included), you can vary the amount of reduction you obtain with this reducer as follows: However, do not be tempted to buy only the longest spacer tube to get the most reduction. i got it for avi's of the moon, it does increase the fov, but cant get it anywhere near focus. It has only one cover, which surprised me. Contiguous US Customers:All items we sell ship for free within the Contiguous US. For the best experience on our site, be sure to turn on Javascript in your browser. Antares focal reducer, 1.25" star diagonal, 1.25" 26mm eyepiece. Found inside – Page 452The image analysis camera (so-called ANTARES system) consists of a beam compressor reducing ... spectrograph in its long-slit mode (upper half) or direct imaging (focal reducer) mode in the lower half. Based on the unvignetted field ... With the Celestron Reducer/Corrector Lens, that's precisely what you get. In the 26mm eyepiece I could just see a hint of the central obstruction. All images are binned 1x1 (i.e., no binning) which yields an image scale of 0.47 arc-seconds per pixel. It is actually only a reducer, but it does increase true field at the expense of some increase in spherical aberration and some vignetting (dimming) at the edge of the field. Hence, be aware that you may not be able to reach focus with all eyepieces or in all configurations with a given barlow/reducer. These are useful when taking pictures of nearby large objects, such as nebulas. Move the focal reducer closer to the eyepiece/camera and its reduction factor will increase. Found inside – Page 12Antares was mounted during the beginning of the night to check the optical quality ; it was still 0.65 " . We stayed near zenith to avoid the ... EFOSC1 is a focal reducer attached to the Cassegrain focus of the ESO 3.6 - m telescope . 26×5 Mins captured in SharpCap pro. Reducer Lens .7x - EdgeHD 800 449.95 $ Contact-us; REDUCER LENS .7X - EDGEHD 925 469.95 $ Add to cart; Reducer Lens .7x - EdgeHD 1400 899.95 $ Add to cart; Reducer Lens .7x - EdgeHD 1100 899.95 $ Add to cart The sheer versatility and performance of this new focal reducer can not be over emphasized! I then switched to the Antares focal reducer, with the 1.25" star diagonal: There was still about 1cm of clearance from the base when pointed at the zenith. These are times when a small “grab ’n’ go” telescope, or even a pair of binoculars, is the ideal instrument. And this book can guide you in choosing and best utilizing that equipment. that accepts standard 2" threaded filters and provides a nominal reduction of 0.7x. Please let us know. 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. Part Number: 94175-CGL. With the star diagonal and 26mm eyepiece the central obstruction was not visible. This book uniquely brings together a collection of observing, analyzing, and processing hints and tips that will allow the amateur to build skills in preparing scientifically acceptable spectra data. For the best experience on our site, be sure to turn on Javascript in your browser. From the reviews: "This is one of several dozen books in Patrick Moore's "Practical Astronomy" series. Amid this large family, Mobberley finds his niche: the beginning high-tech amateur. Equipment. The exact focal length of the reducer/telescope combo depends slightly on where in the optical path the SCT Corrector lens is placed. Such things may include a wedge, focal reducer, additional eyepieces and astro-imaging equipment, and an anti-dew system. Both clusters were well visible in the center of the FOV although there was slightly more magnification. Antares' 2" 0.5x focal reducer screws on to any accessory (such as eyepieces, camera adapters, etc.) The scientific basis for the widely accepted ideal of the brotherhood of man rests on the fact of the interwoven etheric (or energy) structure underlying all forms in all kingdoms within the planet. The 2-element reducer features fully multi-coated optics in a black-anodized aluminum filter cell. Some distortion of the stars was evident at the edge of the field of view. Sign up for our newsletter to get exclusive deals, observing tips, and new product announcements. Here's the moon through the Meade reducer with the Off-Axis Guider: After I completed these intial tests I did some more visual tests using the Double Cluster open star cluster. Focal reducers can be used either visually or photographically to decrease focal length and increase true field at the expense of some vignetting (dimming) at the edge of the field. Telescope: Explore Scientific FCD 100 127mm APO Refractor with ES 3" Field Flattener/Focal Reducer Camera: Pentax K1 Location: Mt. Good Day! ; Made in Canada. The focal length specification of this reducer is 158mm. I then attached the Meade focal reducer to the telescope, with the 1.25" diagonal attached to the reducer: With the telescope Alt/Az mounted and the OTA pointed at the zenith, there is about 1cm of clearance to the mount base. With infinite focus and 20mm clear aperture Antares focal reducer, 2" star diagonal, 2" 30mm eyepiece. More experienced observers and imagers will invest in having the right equipment that is able to make the most out of the LX200. Use of this focal reducer effectively reduces the focal ratio of your telescope, resulting in a wider field of view and significantly shortened . More powerful focal reducers are limited to photographic use, but the f/6.3 reducer works well visually or photographically. During my 8 October 2008 visit to Oracle Observatory, I did the testing with an 8" LX90-ACF telescope. The Antares 0.63x Focal Reducer for SCT is the standard thread-on F/6.3 4-element fully multicoated reducer used on F/10 Schmidt-Cassegrain telescopes. Found inside – Page 875In table 2 , the central wavelengths and passband widths are given for the filters that will be used . The autoguider unit consists of following optical parts : a 45 degrees flat feed mirror , a filter set , a focal reducer that ... Guide: SkyWatcher EvoGuide 50mm with Altair GPCAM v2 130. $108.00. Televue Panoptic 27mm. Based on these initial photographic and visual tests I prefer the Antares focal reducer over the Meade focal reducer. Found inside – Page 89Fig 59 is a wide field image is of the region comprising Rho Ophiocus star, Antares in Scorpious among others. It was taken with a Canon 6D full frame ... Focal reducer, field flattener or filters. • Tring for DSLR and T to 2” nosepiece ... Hence, the "working distance" of this specific reducer is 47.5mm, i.e., this reducer will provide a reduction of 0.5x when the center of its lens assembly is placed 47.5mm from the focal plane of the eyepiece or imaging device. Sign up for our newsletter to get exclusive deals, observing tips, and new product announcements. This book takes a look at traditional telescopes built by the great instrument makers of the 18th and 19th centuries, particularly the dynastic telescope makers, including Dollond, Alvan Clark, Thomas Cooke & Sons, and Carl Zeiss. Fits both Celestron and Meade SCT telescopes. Antares 6.3 focal Reducer. The Reducer/Corrector is f/6.3 for C5, C6, C8, C9¼ and C11 telescopes and f/7 for the C14 telescope.If offers wide fields of view with any Schmidt-Cassegrain telescope. 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. Antares' popular 1.25" 0.5x focal reducer screws on to any accessory such as eyepieces, camera adapters, etc. I could focus again and noticed that with the 2" 30mm eyepiece some chromatic aberration was evident at the moon's limb. Antares #SCTFR f6.3 Focal Reducer with 2" Schmidt Threads for SCT - CANADA ship | eBay Nominally it will be within a few mm of the rear threads on the telescope. Note that the reducer is marked as 0.7x but the actual reduction is determined . This superb fully multi-coated multi-element focal reducer takes advantage of the latest computer aided design techniques to achieve the highest standards of performance set by the brand leaders at a fraction of the cost. Antares f/6.3 SCT Focal Reducer. Antares focal reducer, 2" star diagonal, 2" 30mm eyepiece. You will usually have to determine this by trial and error for your set-up, so you might want to consider buying more than one spacer. I then used the Antares reducer with the OPT 2" star diagonal: With this larger diagonal the maximum elevation is about 75° when mounted in Alt/Az. But that didn't matter as I could not reach a focus with the 1.25" 26mm eyepiece, a 2" 30mm eyepiece, nor with the camera with this combination of Meade focal reducer and 2" diagonal. Serves as a useful reference guide to stargazers around the world. - posted in Cats & Casses: I recently got an Antares focal reducer to use with my Celestron C6-sct. This filter threads on to the rear cell of your Celestron or Meade SCT telescope. This focal reducer will work well for visual use too when coupled with the right kind of eyepieces and telescopes; it is not recommended for very fast scopes or very wide angle eyepieces for visual applications. The 3" Field Flattener/0.7x Focal Reducer from Explore Scientific is a dual-purpose accessory for astrophotography and astroimaging. Antares f/6.3 SCT Reducer/Corrector. Changing this distance should only affect the focal length, not the optical quality. The focal reducer consists of two components (see at right and below), the focal reducer and an adapter for your specific camera/imager. I have also used the reducer visually with a NexStar 8SE and it is very acceptable for that purpose. Antares W70 6mm. Both clusters were just visible in the field of view. Focal Reducers A focal reducer is a lens system that mounts on the rear cell of a scope in front of a flip-mirror, camera, or diagonal and eyepiece. This combination focal reducer and field corrector converts the optical systems of f10 Schmidt-Cassegrain telescopes to f6.3 for photographic imaging. Pinos, California Exposure: ISO 1600, 18 exposures stacked with Deep Sky Stacker, processed with PixInsight and LightRoom 5 During check-out, you will be presented with several shipping choices and costs. Advanced Member. One Response to "How to use Meade f/3.3 Focal Reducer with SPC900NC & Celestron C6-SGT" Morris Adams (1 comments) February 12th, 2012 at 8:42 pm. My testing has been delayed until just recently when I received a new 8" LX90-ACF. Antares .5x and .7x Focal Reducers in 2" Filter Format For larger format imaging, these reducers screws into your CCD camera nosepiece, eyepiece, or any barrel or adapter that accepts 2" filters. It is actually only a reducer, but it does increase true field at the. Found inside – Page 807Intes Focal - Reducer , 0.8x , 2 " -Steck ( 48 Hauptspiegelhalterung für den Spiegel und Fangspiemm Filtergew . ) + T2 , NP : 295 DM , VB 170 DM ; 3. ) achr . gelhalterung mit Streben für obigen Tubus ; kleine AchBarlowlinse ( 24.5 mm ) ... i have an antares focal reducer, but it seems as though i dont have enough travel on my focuser. Free shipping Free shipping Free shipping. Meade focal reducer, 2" star diagonal, 2" 30mm eyepiece. It is actually only a reducer, but it does increase true field at the expense of some increase in spherical aberration and some vignetting (dimming) at the edge of the field. This combination focal reducer and field corrector lens accessory works with all Celestron C5, C8, C9.25", C11 and C14 telescopes. Found insideErnest Howard Farmer's name is primarily remembered for the classic reducer he devised - relatively few know of his association ... one from Ciajka - Antares ( Industar - 69 ) , three from Fujica , two from Minolta , eight Olympus Pens ... [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.] Note that the use of any optical element like barlows and focal reducers changes the focus point of your telescope, requiring additional in-focus or out-focus travel. The Antares 2 inch 0.5x focal reducer screws directly to the 2 inch filter threads found on eyepieces, camera nose-pieces, extension tubes, star diagonals etc. Inside the case is the focal reducer with caps on both ends. Orion Mini 50 Guide Scope - 50mm aperture, 162mm focal length, f/3.2. For instance I got M81 and M82 in the field of view without the reducer and both were on the outer edges of the FOV then with the reducer they were a lot closer to the center with a wider FOV, very nice. The Antares 2 inch 0.5x focal reducer screws directly to the 2 inch filter threads found on eyepieces, camera nose-pieces, extension tubes, star diagonals etc. Some distortion of the stars was evident at the edge of the field of view. A few large telescopes and mounts are excluded from this free shipping offer. Antares' popular 1.25" 0.5x focal reducer screws on to any accessory such as eyepieces, camera adapters, etc. Using the same superb optics from the f6.3 SCT reducer, the Antares 2 inch 0.7x focal reducer screws directly to the 2 inch filter threads found on eyepieces, camera nose-pieces, extension tubes, star diagonals etc.

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