astro tech 60ed. Dedicated 0. astro tech 60ed

 
 Dedicated 0astro tech 60ed 25" non

. Find the position of dust or reflections in your optics. From all the review it seem this is one fine. ? Basically, as my first proper scope, is it worth to spend that $100? I also. This l. The objective has just a few specks of dust which can probably be removed with a simple air-bulb. So don't be a stranger. The sleeve between the flanges is what affords the full 360˚ rotation of the focuser. The main lesson seems to be, however, that if an apo doesn't show a textbook star test then it isn't necessarily a sign of a problem. 6M subscribers in the astrophotography community. Product Description. Help us to grow by adding additional equipment to the database. Zenithstar 61 II vs. the flattener produces wonderful flat fields as well as a 41mm image circle. I am currently using the AT60ED without a field flattener with a crop sensor DSLR (700D) and have found that while it is usable, you want the field flattener. 25" with it fully extended. There's a batch of Apache sale coupons in the latest HF e-blast if anybody's interested. It is high profile to look over the tube rings. Formula: Pixel Size (mm) X Focal Ratio X Diameter of Shadow / Reflection (pixels) If you don't already know the size you can upload an image below and then click & drag over the dust doughnut or shadow to calculate the size. 8X reducer/field flattener is designed for prime focus astrophotography. IC405 - The Flaming Star nebula taken with the AT60ED. Too many 60-62mm options! - posted in Beginning Deep Sky Imaging: Im going to be in the market for a 60-62mm refractor in a few weeks - to mount on my Star Adventurer. This scope is for the person wanting a little more than what the 60ED and 72EDII can bring to the table. 5mm or 7mm DeLite for Astro-Tech AT60ED? - posted in Eyepieces: Im primarily a binocular observer (Canon IS 10x42 and 15x50). Camera lenses are not really suited for deep sky photography. Stellarvue 80mm f/7 access. I note that the 60ED is also described as a quad but is actually a doublet. Formal-Garden-7412 • 22 days ago. 8X reducer/field flattener is designed for prime focus astrophotography with the Astro-Tech AT72EDII, it will work with other variants of the same optical tube. 00 £806. This version has the rack and pinion focuser, and optional guide scope clamp for imaging. Typical of Astronomics it's priced $200 less than the StarField. Skywatcher. Astro-Tech AT65Q ED. Both great scopes when coupled with the William Optics adjustable flattener. 76X imaging time of the ZS81. At Astronomics, we have that experience - a staff total of over 160 years of experience using and selling telescopes. It functions as a handle (This is fairly obvious from the name. 8X reducer/field flattener is designed for prime focus astrophotography with quality f/6 focal ratio apo refractors such as the Astro-Tech AT72ED and AT130 apo, it will also work well with Astro-Tech and other brand refractors in the f/5. The AT60EDP produces a 44mm image circle. Astro-tech 60ED FPL53 glass wide FOV imaging setup. Page 1 of 4 - Astro Tech's new Scopes coming soon! - posted in Refractors : I didnt see this on the refractor forum. This is markedly higher reflectivity than the 88% of a conventional aluminum diagonal or the 96-97%. And since we're a family business, we plan on being. 8X focal reducer/field flattener (like new condition) 3D printed Bahtinov focusing mask (like new condition) Rings and 3D printed risers with riser bolts 32mm Astrotech. A UV/Ir filter should probably be used with all CMOS cameras and refractors, independent of their correction or quality. The main lesson seems to be, however, that if an apo doesn't show a textbook star test then it isn't necessarily a sign of a problem. In. Altair Astro Limited is a UK Company2. Mount Type: Two 1/4-20 threaded holes on foot with spacing between holes: 30mm. Beautiful TAKAHASHI FC-76 MC APO OTA (76/600mm) w/6x30 finder & clamshell. Skywatcher. Decent 2" rack and pinion focuser with sufficient focus travel. A super portable refractor telescope with FCD100 ED glass, suitable for astrophotography or visual use, day or night-time. Joined: 06 Jan 2005. Win some, lose some. New Astro-Tech 80ED - posted in Refractors : I had ordered and received a new open box SVBONY SV503 80ED which arrived with problems and was returned. We carry all brands and products, like Meade telescopes, Celestron telescopes, and more. The difference in price is $399 for the Astro-Tech and $450 for the Orion. ready for shipping in 24 h. The new Astro-Tech ATR8 2" 0. 1 William Optics. 8 with the optional 0. This Astro-Tech AT80ED refractor has: • split tube rings with detachable Vixen-style dovetail for installation on virtually any mount. Page 1 of 2 - Astro-Tech 66ED -- first impressions - posted in Refractors : I finally picked up an Astro-Tech 66ED this week from Astronomics and have been playing with it much of the past couple days. This scope is the ultimate doublet refractor for those not wanting the weight and cool down of a triplet optical set. The EDL is an f/7 and the EDT is a triplet at f/6. I have been very impressed with my modest optics thus far and have. I would get an Erect Image Diagonal for correct terrestrial viewing. This is in superb condition having been used on only a few occasions. VAT) Altair 2 inch Magnetic Filter Holder - T2 - Version 2 £75. The focuser can rotate as well to help you get the perfect framing. Astronomics has an Astro-Tech Voyager 2 that is pretty much the equivalent of the ES Twilight 1. All the best!Looks like a rebrand of the WO ZS 61, also the Astro Tech 60ED, I think Altair have one also. Astro-Tech . Star testing is so-so, by my estimate, about 1/4 wave SA under corrected, a little better than that if I use a prism diagonal. 5 set up with an efl of 950mm. Anyway, I couldn't source a flattener for it but TS offer the Flat60 which is designed for their F5. The Astro-Tech AT60GS guidescope is a 60mm aperture 240mm focal length (f/4) achromatic refractor with a helical focuser. Sure there is another one also out there. This scope is for the person wanting a little more than what the 60ED and 72EDII can bring to the table from an optical standpoint as well as a mechanical standpoint. The camera side of the reducer has 48mm T-threads to connect to a T-ring and camera body. im quite enticed that i could use it for WIDE-field views (even wider than the St-80!), astrophotography, guiding, and even just day-to-day. Inside the cap is a wheel that can be rotated to either line up the Bahtinov. Astro-Tech AT60ED 60mm f/6 FPL-53 ED Doublet $369. It will cost $90 or so more than the AT with shipping, but it’s in stock and they are a great company to deal with. Thank you @peter k! My goal is to pit it against my other two refractors in a 2 against 1 competition. It uses two ED elements in its configuration and offers the unique flat field ability inherent with the Petzval design. 95. com. This is strictly for visual and Im trying to decide between the 2 of them. This is a great little portable package. According to Aperturas website, the flattener should be set to 3mm for the. For Sale. My two larger, heavier, and more expensive 2" wide-field eyepieces haven't seen much use since I acquired the 28mm UWA over a year ago. Inside the cap is a wheel that can be rotated to either line up the Bahtinov. It's performance punches way above its. That means imaging with the AT80EDT requires (6 / 6. Astro-Tech AT102ED 4" f/7 ED Refractor OTA. The AT80EDT is f/6, the ZS81 is f/6. Feel free to make a contribution! Learn more. . 00. Hello everyone, The skies are finally clearing up and I had a chance to test out the Astro-Tech AT70ED. An Astrozap focusing cap is a lightweight aluminum cap that fits over the front cell of your telescope. Soyuz. You get a 2" Rack and Pinion focuser with a microfine 11:1 fine-focusing ratio finished in our Aston Martin Grey trim. Page 14 of 23 - Astro-Tech 80EDL owners thread - posted in Refractors : Now I realize that it’s much easier to produce an 80mm doublet with minimal aberrations than it is to produce a more complex 180mm triplet at the same focal length, but regardless, this AT80EDL appears to be a good example of the right way to make a scope. The field is very large and with a focal reducer such as the WO 0. Wanted- Tele Vue NP101 or NP101is. The distance needed is 54. Astro Tech AT60ED Bahtinov Focus Mask -RED-AT60ED . This product is discontinued, for the new 5V EAF please click here. 95. Is there an Astro Tech dealer in Australia or do you purchase direct from the USA? I would like a AT65EQD. VAT) Altair 70ED Triplet APO Refractor Telescope From: £759. Astro-Tech 60ED vs. 8X reducer (384mm @ f/4. I know you get what you pay for, but I also cant justify spending over $500 on a hobby I might not be able to figure out lol. For Sale. Wanted. One good alternative is to buy the Astro-Tech AT60ED - which is basically the same scope as the Z61 - from our friends at Astronomics, along with the field flattener, for less than the new Z61 costs alone. ·. 50 (ex. (0. They are pretty much optical twins with no. 25" · Optolong H-Alpha 7nm 1. ASTRO-TECH AT72ED 72MM F/6 ED $379. Seems expensive. JPG . This Astro-Tech AT60EDT ED triplet refractor has: • 60mm f/7 fully multicoated apochromatic ED triplet refractor optics. Posted 23 May 2019 - 11:05 AM. Don't have an Astromart account? Click here to create one. 60mm Astro-Tech ED - posted in Refractors : Sears 60mm x 700mm Discoverer (Towa) achromat, circa 1968, vs. Mounts for Astro Tech AT60ED - posted in Refractors : Hi folks, I recently picked up an Astro Tech AT60ED as my first scope and noticed the mounts on each side of the scope for spot/guide scope and other peripherals. I'm VERY pleased with my AT115EDT. 00 £632. As you add equipment to the view, the details will appear below. 8x field flattener (no stock currently) + William Optics 48mm T-mount for Sony E-mount OR 2. In summary, we are using Nyquist as a starting point, with a slight tweak, because we are typically sampling very small, circular, stars. The Astro-Tech reducer/flatteners thread into the focuser for a solid connection. Feel free to give us a call if you have a question about your scope if it isn’t an Astro-Tech product. Parameters: Size: 59mm x 52mm x 41mmAT72EDII vs SV503 70ED - posted in Beginning Deep Sky Imaging: Im looking for a small portable refractor to get into AP and Im currently looking at a used AT72EDII or a new SV503 70ED, both include field flatteners. FF130. Add New Equipment To Database. Hopefully someone here has. I fashioned a solar finder from an old white plastic aspirin bottle, which works perfectly. 7X - even at $400 - makes a 294- or 533-size camera an affordable, awesome screaming-fast system when coupled with an Astro-Tech EDL or EDT. VAT) Out of stock. 5 MC Red, mint condition. Back to top #12 jcj380 jcj380. William Optics RedCat 51 (Upgraded Version) + William Optics 48mm T-mount for Sony E-mount 2. Deep sky object photographic data courtesy: DSS/STScI. Altair Astro Limited is. 6 lbs: 8. Astro-Tech has a reducer/field flattener for the 130EDT available for $199. 25" dewshield extended. 8X Reducer for 60ED (ATRF60) Software Pleiades Astrophoto PixInsight Acquisition details Dates: Sept. Add to View. 50 mm - 60 mm High Profile Rings. But at this price range, it could not be better. Kind of a MkII. View profile Send private message Share; Navigation contextPage 1 of 2 - At102edl mini review - posted in Refractors : It’s mini because my experience with refractors is mini ,however with all the speculation of how good the edl 80,102 and 125 would be , I can say I am very pleased with the 102. I have for sale a near new, recent vintage Astro-Tech AT60ED. VAT) Altair 70 EDQ-R F5 Quad APO Astrograph £1,150. Page 2 of 3 - Star Tests: 60mm Sears vs. Refractors. Ended up just ordering the 7” Astro-Tech dovetail which hopefully will arrive tomorrow. NET assembly calls. California nebula Astro-Tech 60ED test Equipment Imaging Telescopes Or Lenses Astro-Tech astrotech 60mm Imaging Cameras ZWO ASI1600MM COOL Mounts iOptron. Astro Tech 60ED in my Apache 3800 from Harbor Freight. Thank you Jeremy. Astro-Tech AT102ED Imaging Cameras ZWO ASI294MM Pro Mounts Sky-Watcher EQ6-R Pro Filters Optolong Blue 1. 50 UK Price £. Length: 18" dewshield retracted, 21. 9 specification likely results from a lens cell with a slightly larger entrance pupil). This Astro-Tech AT102ED refractor has: • 102mm f/7 fully multicoated doublet optics using FK-61 ED glass. Im looking for a 300mm vintage lens or more but. You can read this instruction for the full supported list and the connection methods: ZWO EAF Compatible Focuser List & Connecting Methods. Star test results using an artificial star at a distance. I am selling my Astro-Tech 60ed + . Posted 20 August 2016 - 08:15 AM. buy DETAILS *Special offer while stock lasts * The Astro Fi 6" is a computerized alt-azimuth Schmidt Cassegrain telescope perfect for terrestrial and celestial viewing on the go. Page 1 of 4 - ASTRO-TECH AT80ED 3. Orion Versago II is another that would work fine. So don't be a stranger. It can be ordered with various accessories. Add To Cart. Most Read Articles • Contact UsContact Us • Moon PhaseOk, so today I received my brand new Sky Rover 60ED purchased directly from the Aliexpress store. Those AT dovetails are great - having the long slot in the middle is very convenient for different. 67 = 2 / 3, 2 = 4 / 2). Page 1 of 5 - Astro Tech 80EDL or 80EDT? - posted in Refractors : Was wondering if anyone has experience between these two scopes. Artificial stars at a. (They have a first look video out already. Maybe try with 10 images at first instead of all 274. Hardtailparty is gonna put out a review for the Habit soon. The important performance updates come in the type of ED element combination and the type of focuser the AT102EDL is built around. Its tube is. Yeah, that's cutting the illumination circle a bit, but so what. 7. 11/10/2023 06:06PM. This Astro-Tech AT70ED refractor has: • Single ring with a foot that has a 1/4" 20 thread hole for easy attachment to a dovetail. There is no comparison with the default Synta focuser. I want to invest in my first astrophotography telescope which would be used with my iOptron. 25-inch adaptor. Everything is in good condition, no major issues. Nirvanaepic • 22 days ago. The price difference between the two not counting taxes or shipping is only about $10. 25" non-marring compression ring accessory holders. Last updated on Jul 13, 2023 15:59:36 PDT View all revisions View all revisions. by Bigzmey » Sun Jun 20, 2021 1:21 am. Astro-Tech AT60ED and AT72EDII Black Friday Sale; Universal Astro Sale; Various Used and Demo Scopes and Mounts; Astro-Tech College Tuition Sale; iOptron 20% Off Sale. Page 1 of 2 - Yet another rebranded Sharpstar 60ED available now - posted in Refractors : I got an email from High Point today talking about a new Apertura 60mm f/6 FPL-53 doublet that looks exactly like the Sharpstar 60mm which is currently being sold with branding from Astro-Tech, Teleskop-Service, Altair Astro, and William Optics. Due to a stock re-organisation, Altair is closed to visitors and we cannot take phone calls between Mon 25th and Fri 29th - we are still shipping goods but there will be a 1-2 day delay in shipping. This scope is for the person wanting a little more than what the 60ED and 72EDII can bring to the table. 83 (ex. It can't be used visually. Looks like it could be quite interesting, and at a very reasonable price: Wow. It looks better from the outside, but when youre observing or doing astrophotography in the dark, you. 34mm and that is the thickness of the spacer (s) you require. WO Zenithstar 61 APO $478. You get a 2" Rack and Pinion focuser with a microfine 11:1 fine-focusing ratio finished in our Aston Martin Grey trim. AT60ED AT72ED II AT92EDT AT102ED Thank you very muchAn astrophotograph by Gideon Golan on AstroBinAstro-Tech AT60ED and AT72EDII Black Friday Sale; Universal Astro Sale; Various Used and Demo Scopes and Mounts; iOptron 20% Off Sale While Supplies Last;. Of the remainder, two are vintage Japanese refractors and the rest are various American scopes. I have been considering the Astro-Tech AT60ED 60mm and the Apertura 60mm FPL-53. I thought most t-rings were at 9. William Optics RedCat 51 (Upgraded Version) + William Optics 48mm T-mount for Sony E-mount 2. My goal in purchasing the Astro-Tech 60ED is to have a very portable scope that lets me take moderately closer glimpses at deep sky targets of interest to me. 5 and F6 versions. 8X Reducer for AT102EDL (AT102EDLRF)GetLeadsFast, LLC. So until then I am stuck using scope uncorrected. Calculate the resolution in arc seconds per pixel of a CCD with a particular telescope. Most Read Articles • Contact UsContact Us • Moon PhaseAstro-Tech 60ED Unboxed Equipment Discussions. • dual-speed 2" Rack and Pinion focuser with built in rotator. For example, the fully-multicoated. If it is a repeat please delete. It can be ordered with various accessories. Calculate the resolution in arc seconds per pixel of a CCD with a particular telescope. You are better off with a short refractor like a Astro-Tech 60ED + 0. Posts: 3,915; Joined: 08 Jul 2014; Posted 14 August 2019 - 08:09 AM. AG Optical Systems. " . 67 / 5 ) $ 770. The Ultimate Kit for the Apertura 60 mm Doublet RefractorIncludes a Full-Frame Field Flattener and 32 mm Guidescope. By far the TV-60 is the most portable scope with great optics for birding and casual astronomy. A super compact ED refractor with dual speed rack and pinion focuser, proper tube. Since I had a GSO 0. In summary, we are using Nyquist as a starting point, with a slight tweak, because we are typically sampling very small, circular, stars. Starwave 70ED Refractor Optical Telescope Tube (OTA), 2"-1. It is not too heavy and gives you a focal length of 288mm. Astro-Tech astrotech 60mm Imaging Cameras ZWO ASI1600MM COOL Mounts iOptron iEQ45 Pro Filters Astronomik Blue 31mm · Astronomik Green 31mm · Astronomik Red 31mm · Astronomik Lum 31mm · Astronomik H-Alpha 6nm Accessories Astro-Tech 0. Looks like a mix-up in the descriptions. The opening of the shoe will accept generic Vixen style finder brackets. Astro-Tech Product #: AT60GS . It goes through numerous inspections, at the factory, at Tecnosky and Rupert at Astrograph also checks it out before dispatch. SKU: N/A Category: Discontinued Product. 7- Astro Telescope 102 F/11- very nice scope, classic Fronhofer But out classed by my Altar 102ED F/1122. Resolution Formula: ( Pixel Size / Telescope Focal Length ) X 206. Would I be better off with the Flat61R on the AT60ED or the Astro-Tech . Stars are generally small with an even focused field across the QHY8. Edit: I put an S on the end of scope in the title. Astro-Tech AT60ED Backfocus Question - posted in Equipment (No astrophotography): I just received a brand new AT60ED today which I purchased hoping to upgrade the guidescope I was using. This 50/60 mm finder ring set mounts into the dovetail shoe on the Stellarvue or Feather Touch focuser. ASTRO-TECH AT72ED 72MM F/6 ED $379. For a little more money, you could go with a lightweight Manfrotto tripod with a. This is cocooned by an impressively long retractable dew tube that moves with silky smoothness. Its color correction puts any achromat or so-called “semi-APO” to shame. 1 F/7 ED REFRACTOR from our friends at Astronmic this will feel in the gap between my 120mm orion st f/5 and my 127 Orion mak as far as a grab and go scope. The Astro-Tech AT80ED has a retractable lens shade and comes in a locking aluminum-frame carrying case with room for accessories. Back to top #7 nicknacknock nicknacknock. This camera sensor is quite different from the one in the ASI294. Cost over $1100 on Hutech's site. Astro Tech, Feather Touch, Please be aware that not all modules from the brands above are supported. The new Astro-Tech AT102EDL is an extension of the beloved 60ED and 72EDII. 5, this telescope provides fast light-gathering. ‎ ‎ Telescopes Canada grew from our personal hobby to Canada's largest dealer for many manufacturers like Celestron, Sky-Watcher, ZWO, William Optics, iOptron, Optolong,. Page 1 of 2 - AstroTech ED80 vs Orion ED 80 for AP - posted in Refractors : Ok these are the scopes in my price range. For Sale. The Astro-Tech AT60EDP Astrograph from Astronomics is a unique apochromatic ED Petzval refractor astrograph that has a four lens fully multicoated optical system. Astro-Tech 60ED Unboxed Equipment Discussions. 4KidsOneCamera • 3 yr. 3D Printed. We carry all brands and products, like Meade telescopes, Celestron telescopes, and more. Omegon 66mm . 5 version for a while). • split tube rings with detachable Vixen-style dovetail for installation on virtually any mount. Aperture: 60mm. My goal in purchasing the Astro-Tech 60ED is to have a very portable scope that lets me take moderately closer glimpses at deep sky targets of interest to me. Yes it is a nice guidescope, and sometimes it will be used in that capacity, but unlike most guidescopes this one has an FPL-53 objective and an imaging focuser. 00. 00 £958. VAT) Altair 70ED Triplet APO Refractor Telescope From: £759. On the front end, the retractable dew shield has an OD of 121mm, in case anyone is considering putting a filter there. . Astro-Tech AT60ED 60mm or Apertura 60mm FPL-53 Doublet APO Refractor - posted in Refractors : I am looking for a terrestrial scope that can also be used for a grab-and-go scope. It's all a compromise between lightweight portability and light gathering ability. 8mm so, if so, you are already too long before adding spacers. 447mm @ f/5. 00. Conveniently lightweight and compact, this Apertura 60 mm f/6 Doublet APO Refractor Telescope is a highly versatile instrument that works as a travel scope, guide scope, spotting scope, or even as a super finder. 8x reducer/field flattener for f/6 refractors is now available from stock. Astro Tech AT60ED Bahtinov Focus Mask -RED-AT60ED. On the front end, the retractable dew shield has an OD of 121mm, in case anyone is considering putting a filter there. The scope is a f/5. Astro-Tech 70ED - posted in Refractors : Im thinking of getting the $299 AT70ED as my first foray into astrophotography. )The optics. I record a 35sec AVI file (using Asi 290MC camera) and process in Autostakkert! I am blown away by the results. It seems like it’s similar, and yet quite a different design than their. 00. Astro-Tech . $60. IMG_0602. 50 (ex. " . The Astro-Tech reducer/flatteners thread into the focuser for a solid connection. California nebula Astro-Tech 60ED test Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: California Nebula · NGC 1499 · The star ξPer. Add to Cart. 83 (ex. 8x field flattener (no stock currently) + William Optics 48mm T-mount for Sony E-mount OR 2. The Sharpstar 60ED is a versatile telescope that is perfect for viewing celestial objects such as the moon, planets, and stars. (I will be mounting the scope on a SLIK tripod and using either the Omegon Baby or DSV-M mount). Page 1 of 2 - Astro-Tech AT60ED - posted in Beginning Deep Sky Imaging: Hi folks, curious on peoples take on this scope. arXiv:1810. In addition to the BVF I have both Stellarview 50 and 60mm RACIs, the Astro-Tech (Long-Perng) 10x50 RACI, and a GSO 8 x50 RACI. Focal lengths are 560 for EDL 480 for the EDT. Canon 100-400 IS I vs. 1. 5 inch rack and pinion focuser addresses what was the only weak point in some of the first AT-102EDs. 8X Reducer/Flattener + Williams Optics Guidescope package. 1 lbs: Keep in mind, the weight of these configurations will vary depending on the exact camera body you are using, and does not include any extra weight such as field flatteners, filters, or guide telescopes. 95. AstroBin is an image hosting platform and social network for amateur astronomers and astrophotographers. I was very excited - until I opened the box to inspect my new telescope. Although designed primarily for use with the new Astro-Tech AT60EDT triplet apo refractor, and priced at only $119. Basically, what takes 4 hours of imaging with the ZS81 takes 3 hours with the AT80EDT if the same power of flattener. 25" diagonal has state-of-the-art 46-layer dielectric mirror coatings for a full 99% reflectivity. Astro-tech AT60ED + Astro-tech 0. The Astro-Tech ATRF60 0. Astro-Tech AT60ED . Weight: 6 lbs 3. This Astro-Tech AT60EDT ED triplet refractor has: • 60mm f/7 fully multicoated apochromatic ED triplet refractor optics. The Tecnosky 90 OWL is a triplet with Ohara FPL-55 glass and a guaranteed minimum strehl of 0. 60mm Astro-Tech ED - posted in Refractors : Sears 60mm x 700mm Discoverer (Towa) achromat, circa 1968, vs. Add To. Astro-Tech 60ED Unboxed Equipment Discussions. It takes a telescope dealer with practical hands-on telescope experience. The ASI533MC Pro is ZWO’s latest OSC camera, and it’s equipped with a 9MP Sony IMX533 CMOS sensor. Astro Tech 60ED Telescope Review A miniature telescope with a specific task in its future, if I'm. 11/10/2023 03:01PM. William Optics z61 with field flattener. The important perfomance updates come in the type of ED element combination and the type of foucser the AT125EDL is built around. 00 £62. I would get an Erect Image Diagonal for correct terrestrial viewing. 800-422-7876. • 2" and 1. Some of the youtube videos talk about a backfocus adjustment of 3mm, but this particular focal reducer doesn't seem to have the ability to adjust - it is a. The MONARCH Fieldscope offers first-class optics and high contrast. A super portable refractor telescope with FCD100 ED glass, suitable for astrophotography or visual use, day or night-time. Precision Locking Focuser for Auto Guiding with Starwave 60ED Refractor £99. Clear Skies, Phil. Condition is New.