I bought the 0. The Trifid Nebula. And the results were blah with lots of CA, low contrast and general smearing. ZWO ASI 224MC, ZWO ASI 1600MM-C, ZWO ASI183MM Pro, ZWO ASI 120mm Mini, ZWO ASI 294MC Pro. EAF Manual EAF_Manual_EN_V2. IM] 6 Jan 2015 Linearpredictionofatmospheric wave-frontsfortomographic AdaptiveOpticssystems: modelling androbustness assessment Kate. AFAIK, the Astro-Tech Finderscope Mounting Shoe (ATSHOE) is the only finder shoe that will fit the AT60ED. You get a 2" Rack and Pinion focuser with a microfine 11:1 fine-focusing ratio finished in our Aston Martin Grey trim. My 120ED is F/7. Focal Ratio: f/6. SellTelescopes. • two-year warranty. Mac Astronomy. The OP stated that "I originally had an Askar FRA300, but had star shape issues with it that could not be fixed so I. 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. e. 8x Reducer/Flattener that goes with it, too. • durable nylon soft carry case. I plan to use them on an Explore Scientific PMC - 8 Mount. I truly enjoy my Astro-Tech AT60ED. It can't be used visually. You get a single ring with a. Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like)NGC 253. For a little more money, you could go with a lightweight Manfrotto tripod with a StellarVue M1 mount. Astro-Tech AT102EDL FCD-100 and Lanthanum F/7 doublet. My scopes are an Astro-Tech AT60ED and an Astro-Tech 102ED. I managed to get 2 good images for a short imaging session on Oct 14, 2022 (Oct 15, UT. 95. As for the flattener, Astronomics sells a dedicated flattener for the AT72ED which would be the one I’d go for, or I believe. Thanks. 00. I want to attach a bracket for an electronic focuser motor to the 10:1 fine focus shaft on my Astro-Tech AT60ED telescope, which appears to have the same focuser as the Zenithstar 61II (see page 7 of the manual). BFaucett and RedzoneMN like this Back to top. Sturdy, capable but manual. Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like)Astro-Tech AT60ED William Optics RedCat 51 APO Askar FMA135 Celestron C5 Spotting Scope My Mac Setup Blog Image Gallery William Optics RedCat 51 APO. I have several choices as:. The EDT triplet is surprisingly 2 lbs lighter and comes with a case. - The AT60ED is like other nice refractors with 2", 2-speed focusers, only smaller. This Astro-Tech AT60EDP refractor astrograph has: • 60mm f/5 fully multicoated four-lens Petzval refractor. 8lb apertura 60mm 3. Took my AT60ED out for first light last night using the AstroTech ATR8 field flattener/0. Astro-Tech makes a 7” dovetail that does the job. The Sky-Watcher Evostar 72ED from Sky-Watcher uses a crown. Page 3 of 3 - Star Tests: 60mm Sears vs. Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like) CK (Karoonda-like) CR (Renazzo-like)Page 3 of 5 - Anyone with an AT60ED? - posted in Refractors : On the WO, the compression ring screws off, then screw on the FF. Astro-tech AT60ED; Camera: Canon T6i; Intervalometer: Neewer Intervalometer for Canon; Polar Alignment: QHY PoleMaster; Finder: Telrad Finder; Disclosure: Disclosure: I am trying out the Amazon affiliate programs. . The Astro-Tech AT60ED is priced at $369US and comes standard with a 2″ to 1. I'm based around the SkyGuider Pro. 8X reducer and field flatener for the Astro-Tech AT60ED today. Depending on what you bring, it will weigh between 20-35 pounds. So until then I am stuck using scope uncorrected. 800-422-7876. Now on astronomics it say for the availability More on the way. Aperture: 60mm. Hello all, in this video, and with some clear skies, I am finally reviewing the Astro-Tech AT70ED. Hello everyone, The skies are finally clearing up and I had a chance to test out the Astro-Tech AT70ED. Canon T7i body. (Yes, I understand they're all the same scope)For context, I have the ASTRO-TECH AT60ED with a field flattener that I ordered hopefully coming in some time soon. 67” and 2”. I hope you guys will like it. Star Freeze version. • 2" and 1. Astronomics has an Astro-Tech Voyager 2 that is pretty much the equivalent of the ES Twilight 1. g. Explore Scientific ED127, SkyWatcher ED80, Astro-tech AT60ED. It seems like it’s similar, and yet quite a different design than their. A UV/Ir filter should probably be used with all CMOS cameras and refractors, independent of their correction or quality. It gives you a 288mm F. Star test results using an artificial star at a distance. 95. 1. Lagoon Nebula – 7×240 sec, Gain 11, Offset 100, QHY183c at -20C, UV/IR filter, Astro-Tech AT60ED at F/4. 8 Field Flattener for same. jpg . Optics Type: ED FPL-53 Refractor. But the AT60 really isn't intended for planetary visual use. Theres two mounting screws on each side of the scope. Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like) CK (Karoonda-like) CR (Renazzo-like)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 While Supplies Last; Meteorites. Feel free to give us a call if you have a question about your scope if it isn’t an Astro-Tech product. I tried it out this evening and I cannot achieve focus. This Astro-Tech AT80ED refractor has: • split tube rings with detachable Vixen-style dovetail for installation on virtually any mount. It weighs 6. And I used a telescope T-Ring. New for 2021. Update: It appears as though this telescope is no longer available. In astrophotography I aim to keep price down, and when I saw that I could pick up an APO ( apochromatic telescope ) for $300 US, I couldn't pass it up. It has a flat top surface. Beginner Set-up Advice - posted in Beginning Deep Sky Imaging: My Set-Up includes: Astro-Tech AT60ED Astro-Tech . Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like)This Astro-Tech #ATREDT15 0. This is a dedicated flattener for the Astro-Tech AT60ED 60MM F/6 FPL-53 ED doublet refractor, not sure if it will work with any other scope. 25lb Astro-tech AT72EDii 4. Accessories also available for purchase separate from the AT60ED. The flattener produces wonderful flat fields as well as a 41mm image circle. •. But the AT60 really isn't intended for planetary visual use. I currently have a Lunt 50mm H-alpha and Astro-Tech AT60ED filling these niches. For this target of M31 (the Andromeda Galaxy), the Edge is only going to capture a portion of the galaxy, while the RedCat is going to capture an area much larger than the galaxy. 8X Reducer for 60ED (ATRF60) · ZWO ASIAIR Plus Software ZWO ASIStudio Acquisition details Dates: Dec. Back to top #9 So Confused So Confused. However, it is about $190 more than the Astro-Tech AT60ED and I found a place that will be getting some AT60ED scopes in a month. Thanks! I was just on the phone with them because I was curious. I would get an Erect Image Diagonal for correct terrestrial viewing. Explore Scientific ED127, SkyWatcher ED80, Astro-tech AT60ED. I have talked to the people at astronmics. 25" non-marring compression ring accessory holders. A simple calculation says that with an eyepiece with a 46 mm field stop, (41 mm Panoptic, 40,mm XW), the edge focuses 2. The nosepiece spacing asks the SVBony to function at 0. The finely-machined Astro-Tech AT102ED comes with both 2" and 1. It's almost $200 cheaper. Both are. WO Zenithstar 61 APO $478 . Astro-Tech 60ED Review So very dinky. My current top choice is the ASTRO-TECH AT60ED 60MM F/6 FPL-53ED AND LANTHANUM DOUBLET and 0. Our calculator, at typical seeing of 2-4”, uses the Nyquist formula of 1/2 and the 1/3 to stop stars becoming square so the optimal range is between 0. This Astro-Tech ED refractor has: • 80mm f/7 fully multicoated FCD-100ED and Lanthanum doublet refractor optics. The ring/clamshell is hinged. 25 pounds all together. Do not use the screws provided with the shoe. 00. M45; " The Pleiades"; "The Seven Sisters". 6 72ED Astronomical Telescope $463 Sharpstar 60ED Astronomical Telescope $366 / $436 with Flattener. Reviews. And to round it out we have some great 60mm Guidescopes from Astro-Tech for $139. 25" (286mm) deep including the feet that prevent the case from resting directly on the ground. Reviews. I’ve been lucky enough to spend a few months basking in the spectacular far southern sky of New Zealand. In summary, we are using Nyquist as a starting point, with a slight tweak, because we are typically sampling very small, circular, stars. Furthermore, it's designed for any refractor with a focal ratio between f/6 and f/8. The opening of the shoe will accept generic Vixen style finder brackets. September 3, 2018. flatener for ASTRO-TECH AT60ED 60MM F/6 FPL-53ED - posted in Beginning Deep Sky Imaging: I would like to purchase the ASTRO-TECH AT60ED 60MM F/6 FPL-53ED, but reading various sites on it. 8x reducer/flattener? The Astro-Tech AT60GS guidescope is a 60mm aperture 240mm focal length (f/4) achromatic refractor with a helical focuser. 0 - Not a color filter. Canon T3 with Astro-Tech AT60ED scope at F/4. If you want to image with the AT60ED, then you need this flattener. It will not work on all of them however. I was at the observing site south of Perry, LA where it is. Unfortunately, it virtually never seems to be in stock. is the kind of super value only Astro-Tech can give you!Because the likes of William Optics Zenithstar 61, Astro-Tech AT60ED, Apertura 60EDR are all examples of "cheap" scopes with focusers as good as any other refractors. The Astro-Tech’s focuser is a dual-speed Crayford with a calibrated scale on the drawtube to “mark” the focus point for different photo and visual applications. In a color camera setup, the tilt plate is attached to the camera directly. Astro-Tech AT6RC Takahashi Epsilon E-200 Explore Scientific 102ED FCD100 Astro-Tech AT60ED William Optics RedCat 51 APO Askar FMA135 Celestron C5 Spotting Scope My Mac Setup Blog Image Gallery January 20, 2020. each. 8x Field Flattener. 95. 00 Astro-Tech AT60ED 60mm f/6 FPL-53 ED Doublet $369. The Astro-Tech AT60ED is priced at $369US and comes standard with a 2″ to 1. Click on the pics to view a. The AT60ED is a good portable scope that will work on a lightweight mount. " . I like both the build and look of it, and the functionality of the rack and pinion focuser, but Im having a problem that Ive never experienced. Reviews. 0 Sensor/Hand Controller Interface 3. Lukomatico just gave the Gear 60 a great review on YouTube. 9×180 sec, QHY183C at Gain 20, Offset 0, -15C cooling, UHC filter, Astro-Tech AT60 ED at F/4. $99. Tech Details. Hopefully someone here has. The scope weighs in at a light 3. Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like)4KidsOneCamera • 3 yr. The AT80ED is bringing ED optics to you at a fantastic price. I picked one up during a fire sale in December since the Astrotech ff, like you said is out of stock. Images acquired using Sequence Generator Pro (free version). 8. It is designed primarily to hold small Astro-Tech, TMB, TeleVue, Orion, Takahashi, and Meade refractors,. 0. L. 5mm audio, Centre Positive The ZWO EAF utilises a. Length: 18" dewshield retracted, 21. The plate is well machined and sturdy within the mount. 25" non-marring compression ring accessory holders. It comes in a soft foam-fitted Cordura-style nylon carrying case that has cutouts for six eyepieces in addition to the scope. Anyway - the Meade came with the following. " . 95. Im also curious if anyones tested upgrading the ring/foot on the AT60ED using. 8. Search the forum for each, there are a large numbers of thread about the AT60ED, and it's Kunming United factory mates, WO ZS61. . Reviews. Business, Economics, and Finance. 8x Field Flattener. Add To Cart. Reviews. However, there's no manual for this particular. 00. 8° N; Posted 29 September 2021 - 02:10 AM. 95 strehl or better optics. 9×180 sec, QHY183C at Gain 20, Offset 0, -15C cooling, UHC filter, Astro-Tech AT60 ED at F/4. Newbie Questions - Canon 40D and Astro Tech AT60ED - posted in Beginning Deep Sky Imaging: Hello I have a used Canon 40D DSLR, an Astro Tech AT60ED and a 0. I want to use Astroberry and Im currently going through the EKOS and. 1 year. New member here about to make the bounce from doing astrophotography with a 70-200 lens to a small OTA, the ASTRO-TECH AT60ED in particular. astro-tech AT60ED 3. . Astro-Tech AT60ED-----Equipment explorer: Astro-Tech AT60ED AstroBin's equipment database is entirely maintained by the community. Astro-Tech AT6RC Takahashi Epsilon E-200 Explore Scientific 102ED FCD100 Astro-Tech AT60ED William Optics RedCat 51 APO Askar FMA135 Celestron C5 Spotting Scope My Mac Setup Blog Image Gallery February 8, 2021. And if you do choose to buy it, get the Astro-Tech AT60ED, its the exact same thing just rebranded of the same optics. A beginner telescope for astrophotography at a fantastic price, the Astro-Tech AT70ED 2. This Celestron piggyback mount is a handy accessory for all observers interested in wide-field deep-sky astrophotography. Unfortunately the more I dive into stuff the more indecisive I am getting. . The Astro-Tech AT60ED might be just the compact high-quality grab-and-go or travel scope you have been searching for. Object. It measures 35" (889mm) long, 10. Pier-Tech Inc. In April of 2021 ZWO introduced this new 5 Volt version. Focal lengths are 560. Brands / Companies 928 ; Cameras 3314 ; Sensors 465 ; Telescopes & lenses 3754 . The star test results dont surprise me. Astro-Tech AT60ED Imaging Cameras Canon EOS 1300D / Rebel T6 / Kiss X80 Mounts iOptron SkyGuider Pro Accessories Astro-Tech AT60FF field flattener. 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. You get a 2" Rack and Pinion focuser with a microfine 11:1 fine-focusing ratio finished in our Aston Martin Grey trim. While this Astro-Tech #ATR8 0. Chondrites (Carbonaceous) CI (Ivuna-like) CM (Mighei-like) CO (Ornans-like) CV (Vigarano-like)Astro-Tech AT60ED with the 0. 25" Ha, R, G, & B Filters Mount: Skywatcher EQ6R-Pro Processing: HaRGB image. Imaged with a Astro-Tech AT60ED, Lunt White Light Solar (Herschel) Wedge, 2. 5N/M Focuser Payload Limit 5KG Power/Data Interface USB 2. Reviews. 72 arc sec/pixel with my camera. If you have long optics, work with them first. 6 72ED Astronomical Telescope $463. Mount Type: Two 1/4-20 threaded holes. The Optolong H-Alpha filter allows a 7nm bandwidth of light centered on a wavelength of 656nm through, and. I still would like to retain my T7i camera body. I spoke with Highpoint Scientific for the Apertura equivalent scope and Astronomics. Mac Astronomy Software. From here you add objects by using the Plus symbol in the lower left. It’s $949. For the Astro-Tech Field Flattener the optimal spacing from field flattener to film plane: 57mm +/- 4mm and Canon is supposed to be 55. 84 kg) whereas the Astro-Tech 72ED clocks in at 4lbs 13. Cameras: ZWO ASI120MM Mini, ASI224MC, ZWO290MM Mini, ZWO ASI294MC Pro, Canon M6 Mark II. Both have FPL-53 glass. Reply More posts you may like. 8x reducer/flattener, both of which are backordered, or should I splurge for the twice as expensive William Optics Z61 plus their 0. 00. No liability assumed for product specifications. Product Description. We have a shipment of Astro-Tech due late July. It surprised me how well this came out with only 3 sub-images. We started getting everything out today. It has a flat top surface. Astro-Tech AT60ED with the 0. 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 While Supplies Last; Meteorites. While I wait for astronomics to deliver my scope, I. 265. 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. The objective has just a few specks of dust which can probably be removed with a simple air-bulb. Like. However, it is about $190 more than the Astro-Tech AT60ED and I found a place that will be getting some AT60ED scopes in a month. 6 oz (2. EDIT: If I go to Astronomics from the link at the top of the page, and then use the 'Telescopes' drop-down -> 'Astro-Tech' -> 'Astro-Tech ED Refractors' and pick the AT60ED from the full list it says 'In Stock'. A simple calculation says that with an eyepiece with a 46 mm field stop, (41 mm Panoptic, 40,mm XW), the edge focuses 2. paulsky, zjc26138, doctordub and 10 others like this. Warranty. 8 lens for faster and wider field astronomical and terrestrial photography. The AT60ED has a supplied ring/clamshell with the ability to attach to any mount, or dovetail, with a 1/4″ 20 thread adapter or the ability to use a 1/4″ 20 thread screw. The Starblast has a focal length of ~450mm vs 360mm for the AT60, so the Orion is capable of marginally higher magnification for lunar/planetary viewing. Tech Details. Accessories also available for purchase separate from the AT60ED. 8x Reducer/Flattener that goes with it, too. 67 = 2 / 3, 2 = 4 / 2). This astrophotography telescope uses high-quality Ohara glass, and comes with a dual speed 2. 8. At just under the $2000 range, (including an aluminum case) This telescope is definitely a top contender for my hard-earned cash. Seems like that would be an even better guidescope, maybe useful for other DSO socpes I buy later, and also a portable travel scope. 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 While Supplies Last; Meteorites. I basically have the rig you're thinking about. Match them up at the hardware store and buy a handful of extra washers while you are there. Color. The focuser can rotate as well to help you get the perfect framing. . Leo Triplet NGC 3628, M66, M65. This Astro-Tech AT60EDT ED triplet refractor has: • 60mm f/7 fully multicoated apochromatic ED triplet refractor optics. 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. FCD-100 is comparable to FPL-53 but FK-61 is more like FPL-51. Henault-Brunet´ et al. g. The Orion flattener, I believe others. 3 dob? - posted in Reflectors: Ive been thinking maybe the Astro-Tech AT60ED would make a good finder, I could probably get a nice widefield eyepiece that would give me a good wide FOV, but Im not sure. While I wait for astronomics to deliver my scope, I would like to understand if I really need to also purchase a 0. If it is will it work out of the box or will I need to buy an accessory package from ZWO to make it compatible. Greetings to all! I have for sale a near new, recent vintage Astro-Tech AT60ED. Imaged Comet C/2022 E3 (ZTF) on the morning of January 27, 2023. I have been doing some research on small refractors and have come down to these 2 options: 1. 124K subscribers in the telescopes community. • Vixen dovetail plate with two tube rings and a carry handle. 62"/pixel. 00. Gemini. This #56 light green Astro-Tech 1. Clear Skies !! Back to top #2 BFaucett BFaucett. By rotating the camera, and making adjustments to the tilt adjuster you can effectively remove all tilt from your camera sensor. 8X reducer and field flatener for the Astro-Tech AT60ED today. * Astro-Tech AT60ED with the 0. This lightweight mount allows you to attach your 35mm, DSLR, or point and shoot digital camera, with its normal lens attached, to the rear cell of all Celestron SCT telescopes. I went out and took few testing shots. Focuser: 2" Rack & Pinion with 10-to-1 Microfocus. The astro-tech needs other accessories to be bought separately (but still comes up cheaper). The AT80ED is bringing ED optics to you at a fantastic price. Click here to create one. This Astro-Tech AT80ED refractor has: • split tube rings with detachable Vixen-style dovetail for installation on virtually any mount. The two silver allen bolts in the center of your photo. The Astro-Tech AT60ED might be just the compact high-quality grab-and-go or travel scope you have been searching for. I purchased one, but it is back ordered till February. 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 While Supplies Last; Meteorites. The Astro-Tech AT60ED APO Refractor that I recently purchased. 5" focuser, its performance with other scopes is not guaranteed. MIA Astro Products - posted in Beginning Deep Sky Imaging: Ive noticed several products listed as back ordered for quite a while now and was wondering if anyone knows the true source are for these products. This new Astro-Tech AT115EDT refractor has: • 115mm f/7 fully multicoated triplet apochromatic optics using an ED center element. That didnt work. Asking $345 + shipping+PP. Guiding is a must so kudos to you for doing it. 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 While Supplies Last; Meteorites. • 44mm corrected image circle. Hughes Thompson. So any advice would be appreciated. The Flattener and the 0. EAF Specifications Construction Material All metal, red anodised finish Motor Specification 35mm Stepper Motor Subdivision Steps 5760 steps Torque 1. ? Basically, as my first proper scope, is it worth to spend that $100? I also. Open menu Open navigation Go to Reddit HomeDew heaters are low wattage 12 Volt DC electrical heater strips that wrap around the objective lens of the telescope (as well as the finderscope and eyepieces, if desired). It was immediately approved and posted Tonight, I will be testing the mount further for astrophotography with my Astro-Tech AT60ED and will report my findings. 8mm" I have the Celestron 8SE with a focal reducer/corrector. 134K subscribers in the telescopes community. Sharpstar 400F5. The TS PhotoLine 60mm, f/6 FPL-53 apo arrives on the market amid some stiff competition from the suspiciously similar Astro-Tech AT60ED, the Altair 60EDF and the William Optics Zenithstar 61 apo (the Zenithstar’s 61mm, f/5. $269. Posts: 711. Vostok 1. "fully-multicoated Astro-Tech ATRF60 converts the 360mm focal length f/6 Astro-Tech AT60ED refractor into a 288mm f/4. Astro-Tech Finderscope Mounting Shoe Apertura 60mm APO Refractor Specifications. Feb 21, 2019 permalink (unknown member) kkoba: Both the Takahashi and the AT60ED are more appropriate focal lengths and also have the facility to mount filter wheels. 5 FR, nets you F/3. 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 cyclical nature leads me to think it may be a rotational. 8, Optolong L-eNhance filter. Andrew Burwell. Not complaining on my end since I have a great AT66ED to keep me happy, just curious. The 130EQ has a weak mount and flawed spherical optics. The EDL is an f/7 and the EDT is a triplet at f/6. Great weather and very transparent skies for this session. I've always imaged with a telephoto lens and decided to move to a refractor. Apertura 60mm APO Refractor Specifications. I would intend to only use it in my driveway, and I have a Win11 Laptop. Reviews. 95. Astro-Tech makes a 7” dovetail that does the job. • a heavy duty nylon carry case. It uses a 60mm f/5. Page 1 of 2 - Thoughts on finder scope for manual 20" F3. The mounting ring needs to be removed completely and then repositioned as shown. 8 reducer and/or my Hotech field flattener would work for it. For sale is arguably the MOST portable astronomical telescope on the market: the Astro-Tech AT60ED 60mm F/6 FPL-53 ED Doublet with a focal length of 360 mm and a focal ratio of f/6. Resolution Formula: ( Pixel Size / Telescope Focal Length ) X 206. Nice 360mm F/6 doublet with FPL-53 synthetic fluorite and Lanthanum lenses. Well, here it is the. 5″ long with. 5mm, 21mm, 11mm spacers > ASI294. 5 to f/7 range that use a 2" focuser.