Starlight Instruments Feather Touch Micro Telescope Focuser for Celestron CPC-11 & Edge HD 1100 Telescopes (Pre-owned) $315.00. MoonLite CR 2″ Newtonian Focuser. Found insideA low-profile helical focuser + comero + magnifier. special attention to the accessibility of the focus and the vignetting of the light cone. For optimum performance at the Newtonian focus, a low-profile helical or electrical focuser ... Are you looking for an inexpensive focuser that is as high-precision and backlash-free as a Crayford? There is a small compromise to this modification as it decreases the travel of the focuser by an amount inversely proportional to the increased length of the longer shoulder screws. For visual use, the smooth focusing brings out the very best in your telescope's optics. Your accessories will remain right where you want them. The preferred method is to contact us by e-mail with your order, be sure to include your name, address, (including country) and telephone number for order confirmation. Use care when disassembling and cleaning. Our expert comment: For mounting on Skywatcher tubes, the adapter ring Omegon V-Power Adapter 80 to 78mm is also required. We do not accept Credit Cards. Helical focusers have long been the answer to a low profile Newtonian focuser. One of the problems has been the annoying slop in the threads. Our Helical Crayford design permits a fast rate, smooth feel, no slop, and backlash free performance in a simple, lightweight design. A graduated scale always shows you the focus position you have just set. The Steeltrail helical focuser is designed completely differently: The inner 2" barrel moves in and out with millimetre precision and your camera or eyepiece will always remain exactly in position. Simple rack and pinion focusers, such as that shown below, used to be very common and can still be found on Newtonian telescopes. 3) The aluminum focusing tube must be anodized to provide proper surface hardness for the bearings. Thanks for looking at this Svbony SV106 50mm Guide Scope , will try to post as soon as I can . 1) We have sold over 2300 HC focusers as of 2013. The aluminum focusing tube must be anodized to provide proper surface hardness for the bearings. Ideal minimum height of focuser from tube would be 58mm or smaller and the focuser draw tube wouldnt stick out more than 20mm from the id of the tube - too much to ask? There is no rotation of the camera, but there are noticeable backlashes. The Focuser. If your telescope is a Newtonian, where the focuser axis will move in a generally horizontal direction, our standard 2" focuser should work fine. This T-2 adapter offers more than a simple adaptation to a T-2 thread. The center focuser hole in the scope tube has to be enlarged and new mounting holes drilled, and an eyepiece extension is needed Find many great new & used options and get the best deals for Newtonian Rotating Helical Focuser 2" & 1.25" at the best online prices at eBay! Mounts Tripods Rings Rails Power Supply ... Binoculars, Spotting Scopes, Microscopes, Range Finders, Night Vision, Magnifiers, Weather, Domes & more, 20 mm (flat support surface) or 26 mm (curved support surface), four bores, distance 63.2 x 63.2 mm (diagonal 90.5 mm). Order the best telescope focuser for your stargazing needs at High Point Scientific. US$ 9.99. The draw-tube does not rotate. Your new focuser does exactly what you tell it to. Provides easy to understand information and guidelines about the design and construction of binoscopes Focusing on both homemade and commercial products, this book provides the reader with simple and straightforward information about the ... Backlash under 0.002". The Orion AccuFocus Electronic Telescope Focuser works with many Orion telescopes for pushbutton control of your focuser. Found insideSee here, Types of Optical Designs, for the light path of a typical Newtonian reflector. Step 3: Assembly of Extra Hardware ... It is a simple helical focuser, meaning you slide the eyepiece to focus, then turn the set screw tight. If however, the focuser axis of travel is perpendicular, as in Refractor and Schmidt-Cassegrain style telescopes, you may want to consider a focuser with an internal brake. Found inside – Page 161Focuser travel is quite limited, however, and may require an extension tube to focus some eyepieces. ... with a 2-inch Crayford-style focuser on the MN61, while the MN71 can be purchased with either that or a 2-inch helical focuser. HC-1 Standard with A Kit = $107.00 + shipping, 2 to 4 = $92.00 std., $97.00 A, $105.00 A w/kit5 to 10 = $90.00 std., $95.00 A, $103.00 A w/kit. First published in 1999, this is an expanded and updated edition of the best-selling, standard handbook on astrophotography for amateurs. I'm sending a check for a 2" focuser by mail today. B&H # ALBDSNT MFR # BDS-NT. We offer Omegon Steeltrail focusers in three different versions: In the case that this article currently is not available from the warehouse, please note the following: we order from this supplier in regular intervals. A focuser holds the eyepiece and allows it to be moved along the optical axis to achieve a sharp image. 4) We use expensive high quality stainless steel bearings and precision 303 stainless steel shoulder screws made in USA. Also, the HC-2 has no grease to collect bugs or get stiff in cold weather. Newtonian Telescope Tube / Truss. * excl. 187 207 20. This book uses over 200 illustrations, images, charts and graphs in addition to the text to help you understand what equipment you will need and how to make it all work so you can create breathtaking images of the heavens. MOTOFOCUS for Astro-Tech AT65ED Rack-and-Pinion Focuser. Focuser includes a 1.25 collet that can be used for added extension. Star Watch will transport you to the farthest depths of space––and return you as a well-traveled, experienced stargazer. i'll . (Bernd Gährken) Some products are called helical focusers, and provide screw turn action for these scopes. Helical focuser for Newtonian telescopes ; When are you going to upgrade your telescope with a professional quality focuser? This is, in effect, adding a helical focuser to easily achieve the best possible focus. 1/10 wave elliptical flat mirrors for your Newtonian project. Here the centre of the secondary mirror is finally perfectly adjusted to the focuser with full illumination (without applying a mark beforehand)! After several models, a design was finalized that resulted in a very nice little 1.250" focuser. Quite frankly, I'm surprised no one ever thought of doing this before. by nw15062 Nov 2, 2013. Newtonian Reflectors. 141 191 6. The Focusing Tube can easily be removed from the Main Ring by simply loosening the friction adjustment screw and carefully sliding it out. Found inside – Page 49LUMICON 1 % " Holical Focuser $ 49.50 WMICON 2 " Helical Focuiser $ 59.50 WMICON Non - rotating Helical Focuser ... or 14 " NEWTONIAN EASY - GUIDER $ 169.50 3x Rolay Diagonal ( see photo ) $ 99.50 Illuminated reticle oyepiece system . Installing was very intuitively and with the supplied spacers, mounting went without a glitch. Listed dimensions are minor axis. SV161 1.25" Double Helical Focuser for Telescope Guide Scope with SV150 Adapter US$ 39.99 Svbony SV181 1.25'' Rack Pinion Newtonian Reflector Focuser We will then reply with the total cost including shipping. Suitable for all 2" focusers. Baader 2" Newtonian Coma Corrector MPCC Mark III - from f/3.5 to f/7. This is the perfect book for amateur astronomers who are about to invest in a new Schmidt-Cassegrain or Maksutov telescope, or for those who already have one and want to get the most out of it. This guide is ideal for astrophotographers who wish to develop their skills using DSLR cameras and as a friendly introduction to amateur astronomers or photographers curious about photographing the night sky. TSFOCR25. Focuser Upgrades Jack Kramer. Most helical focusers have a single thread which limits the travel per turn to about .125". Many telescopes have a focuser which does not allow very precise focusing. Dave wattles, Dear KineOptics-people. Only 2 left. Min Bid $14 . Focuser upgrades for Telescopes with Crayford, rack and piniion and electric focusers for Astronomical telescopes COVID-19 - We are shipping normally with some delays 01322 403407 Purchase telescope replacement parts at High Point Scientific. You need to do nothing more than to connect it to your existing focuser. Brilliant! Manufacturers description:. Kindest regards,
 
Stefan Van de Rostijne,
Assenede, Belgium, Joe,

I just got the HC-2. helical focuser with inner focusing 30mm focuser travel / 70mm focuser lengthprecision focusing inner tube does not rotate large, grippy focus wheel - also great when wearing gloves, 2" helical focuser designed specifically for astrophotography, approximately 0.1mm focusing precision with 42mm of travel, T-2 adapter with T-2 thread and 1.25" connector, 10mm focus travel for small focus adjustments, compression ring so its gentle on your 1.25" accessories, for all devices with a T-2 thread connection, can also be used for eyepieces with a T-2 thread, 30mm focuser travel / 70mm focuser length, large, grippy focus wheel - also great when wearing gloves. This is done using the supplied spacers between the threaded mounting holes on the Main Ring and the focuser mounting plate on the telescope. We will still accept PayPal (with an additional 3% to cover the paypal fee) only if other methods are unavailable. You need to do nothing more than to connect it to your existing focuser. by Buback Nov 15, 2011. 205,88 EUR*. $7.95. The HC-1 can be disassembled and cleaned in under a minute without any consideration to the adjustment or collimation. Different sizes are available on either plate glass or Pyrex and with either enhanced aluminum or silver with silicon oxide overcoat. We do not accept Credit Cards. Page 1 of 3 - Newtonian Focusers - Low Profile - posted in Reflectors: Hi, Im after a focuser that is low profile and doesnt block any light from the primary mirror. In reality it was a friction fit focuser. The helical focuser can carry a heavy eyepiece such as a huge 31mm Nagler, or a hefty camera with absolutely no problem. One of the problems has been the annoying slop in the threads. Shop High Point Scientific today! Newtonian reflectors are a type of telescope which uses mirrors to focus light down to a point. The helical focuser has a 2" barrel. Found inside – Page 59... Téle Vue Nagler ocular ( August focuser with the 1.25 - inch adapter / helical What's New ) . focuser at right . ... FROM TELE VUE TeleDrive announces a new focuser with an ultralow profile for photographic Newtonian telescopes . The 1.000" travel of the HC-1 will accommodate the flange focal lengths of most eyepieces available today including Tele Vue and VERNONscope. Also, the HC-1 can be switched between the Standard and the "A" in minutes. The HC-2 is really nice focuser - gratulation ! Premium 2" Dual Speed Low Profile R&P Focuser for Newtonian/Dobsonian reflector telescopes. We use expensive high quality stainless steel bearings and precision 303 stainless steel shoulder screws made in USA. Once you've found the perfect point of focus, then you just need to remember this setting on the scale - you will then always be able to find it in future. 2" Low 20mm profile helical Newtonian focuser, 1.25" adapter. This shop uses cookies that are necessary for its correct function and, if necessary, also uses cookies from third party providers. The focuser can take 2" or 1.25" eyepieces. Browse our selection for the right telescope motorized, electronic or auto-focuser for your stargazing needs. 15 Lot18 Box B: Finderscopes-Meade 6 X 30 Finder Scope with mounting bracket. FOCN is a standard 2" rack&pinion Newtonian focuser. Spinning the focuser tube moves the eyepiece in and out, like a telephoto camera lens. Vernonscope 2" 45° Amici Prism (Pre-owned) Add to cart. The low-profile design quickly and easily converts your standard Newtonian with a 3" base to a camera-ready telescope. Another problem is the lack of a travel rate fast enough for accurate focusing. This adapter has 10mm of focusing travel. The #FNM4 2" Two Speed Crayford Focuser For Orion XT-I Dobs fits on your focuser base if it looks like this picture and has the three sets of focuser leveling screws, like on the Orion XT Intelliscope and some other XT Dobs. But this set is also useful for other purposes involving permanent large separation set-ups. We have had a few questions and here are some of the answers. i'll . If shipped in the US we ship Priority Mail . It is suitable for both refractors and Newtonian telescopes, but is also particularly useful with Schmidt-Cassegrain telescopes. The rotation is extremely smooth and focusing is no trouble at all. Found inside – Page 159It grossly amplified effects from minimal misalignments and minor runout in the helical focuser, not to mention exquisite sensitivity to ... Newtonian, considered rather “slow” in these days oflarge, fast mirrors, is a mere 0.017 inch. The modular design of the CR 2″ format Newtonian focuser makes it very versatile. What about that for precision? 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. Really, really clever!! Helical Crayford Focuser - v2. Thank you. The design means a helical focuser is lighter compared to other focusers, and this can be crucial when you are trying to balance the telescope. Now all I need is my primary mirror (due in March). Especially difficult jobs such as focusing on a planet can be a real challenge. with your order, be sure to include your name, address, (including country) and telephone number for order confirmation. It's hard not to be tantalized by the smooth action of Crayford design focusers, and thus inspired, many people are replacing their standard rack-and-pinion focusers. For the do-it-yourselfer who mainly wants to observe visually, the low profile Newtonian focuser has . This hefty focuser tips the scales at 14 oz. The shoulder screws are necessary to mount the bearings. Best regards
 
Harro Treur
Hoofddorp, Hello Joe
The Focuser arrifed in switzerland to Day. CENTER: Low Profile focuser with fine helical adjust with built-in Barlow lens. Helical focuser for Newtonian telescopes ; When are you going to upgrade your telescope with a professional quality focuser? Found inside – Page 26129.00 Antares 2 " Helical Focuser £ 39.99 Antares 1.25 " Rack and Pinion £ 49.99 Antares Dual Speed SCT FH £ 115.00 Antares Dual Speed Newtonian Fit £ 110.00 Antares Dual Speed for SW Refractors £ 140.00 JMI EV2 Manual SCT Fit £ 179.99 ... The high-precision mechanics ensure very sensitive and precise focusing. Tts T-2 thread allows you to connect it to any device possessing a T-2 external thread. Free shipping for many products! In a few months, I'll send you a picture of the
completed scope. For visual use, the smooth focusing brings out the very best in your telescope's optics. It is suitable for both refractors and Newtonian telescopes, but is also particularly useful with Schmidt-Cassegrain telescopes. $48.26. In doing so, we try as best we can, the country of origin of our visitors from the IP of the requesting browser. 2" Low 20mm profile helical Newtonian focuser, 1.25" adapter. In this case, please contact our customer service department. Omegon 2 "Steeltrail Helical-IF - the precision helical focuser. Our collection of telescope focusers is as vast as space itself. For visual use, the smooth focusing brings out the very best in your telescope's optics. Please note that only latin characters, numbers and common special characters can be entered. Was: Previous Price. 1.25inch Universal Telescope Focuser Adapter M42x0.75+1.25inch Eyepieces Base. The design of the precision helical focuser eliminates any play in the drawtube over its entire travel range. Tangxi Finderscope, 60mm Double Helical Focuser Guide Scope Finderscope with Bracket for Astronomical Telescope for QHY5II, STI, DMK, ZWO, SG4 4.9 out of 5 stars 7 2 offers from £91.69 The Astrophotography Manual, Second Edition is for photographers ready to move beyond standard SLR cameras and editing software to create beautiful images of nebulas, galaxies, clusters, and the stars. The Lumicon Low Profile 1.25" Focuser for Newtonian Telescopes is a high-precision, pin-and-groove type helical focuser. Low focus is 2.5", travel is 3". Simple adaptation to a Newtonian telescope. This means you can make an eyepiece and camera parfocal with a flip mirror for example. The shoulder screws are necessary to mount the bearings. One turn travels 0.125" (3mm); this gives just as good control as any 2-speed focuser. The Low Profile 1.25" Focuser for Newtonian, 3.5" Base, is a high-precision, pin-and-groove type helical focuser. (.125" ID, .1875" OD, & .063" long), are inserted under each bearing to complete the stack. The low-profile design quickly and easily converts your standard Newtonian to a camera-ready telescope. focuser drawtube. Omegon 2" helical focuser - sharper planets in any telescope. Description: New model with gear drive for heavier lifting capacity. 10mm Helical Focuser For Telescope 1.25 Inch Aluminium Alloy Focusing Stroke NEW. Both adapters make use of a compression ring, so your astronomical equipment is always optimally protected. NOTE: Due to increasing PayPal fees, we prefer checks (drawn on a US Bank), or cash. Full threaded screws should not be substituted as they are under size and do not properly align the bearings. You need to do nothing more than to connect it to your existing focuser.The helical focuser has a 2″ barrel. The draw-tube does not rotate. Helical focusers have long been the answer to a low profile Newtonian focuser. Due to the large number of astronomers using very large heavy eyepieces, big binocular heads, and cameras, we have designed a backward compatable modification to the HC-1 to increase it's stiffness while using these heavy devices. This will of course, depend on where the focuser is mounted in relation to the telescope's focal plane. I am going to turn a solid base out of black Delrin and set the HC-2 on top. The Lumicon Low Profile 1.25" Focuser for Newtonian on 3in Base is a high-precision, pin-and-groove type helical focuser. Please send 2 pieces HC-2 to:
 
Günter Rosenstein
GERMANY, Hi Joe,

I received the focuser yesterday, at last! 11:1 fine focus control for backlash free and image-shift free focusing. Found insideFor optimum performance at the Newtonian focus, a lowprofile helical or electric moto-focus focuser is recommended. These are much smoother to operate than the standard rack-and-pinion types. (For the CCD camera user a moto-focus has ... The helical focuser has a 2" barrel. Reference FOCH. TS-Optics 2" Dual Speed Crayford Focuser for Refractor Telescopes. It has zero play in it - unlike the cheap 1.25" rack-and-pinion focusers supplied on many entry-level scopes - but fine adjustment is a bit difficult to achieve and focusing by twisting the eyepiece can be a bit unusual. 524/2013 on Alternative and Online Dispute Resolution (ADR / ODR), online retailers are obliged to place an �, Antares Low Profile 2" Helical Focuser - height only 20 mm. Both adapters make use of a compression ring, so your astronomical equipment is always optimally protected. Available in other Styles, Configurations & Kits. They have a primary mirror, secondary mirror, and usually a corrector element at the focuser. Svbony SV181 fully metal 1.25'' R&P newtonian reflector focuser with 65mm focuser travel. Both adapters make use of a compression ring, so your astronomical equipment is always optimally protected. We offer everything from our heavy duty tri-knob reduction unit with shaft lock system to different types of motor options for both . 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. any focuser on a Newtonian telescope. The low-profile design quickly and easily converts your standard Newtonian with a 3.5" base to a camera-ready telescope.For visual use, the smooth focusing brings out the very best in your telescope's optics. Many amateur astronomers have a Skywatcher telescope and want to upgrade it. Peter Manly surveys more than 150 unusual telescopes designed by amateur and professional astronomers to suit some special need. One phrase comes to mind. Free shipping. Found inside – Page 2... four - vane spider , new helical eyepiece focuser , standard ASTROLA legs and column stand , and rugged aluminum head . ... In all respects , the ASTROLA is a fine , firstquality 6 - inch Newtonian reflector . AT65ED, part number MFAT65 (Reduction Knob OD is 24mm or 0.945") AT65EDQ, part number MFAT65Q (Reduction Knob OD is 27mm or 1.063") Please note that both sizes have been seen on both scopes. The Dual Speed Helical Focuser (DSHC) mechanism The DSHC mechanism is extremely simple to make. 1.25 inch Telescope Helical Focuser w/ M42 . I have not been able to point the telescope at the stars yet: cloudy all the time. The Crayford design allows for fine, smooth adjustment in focus, and doesn't require the focuser tube to have a rack machined into it, so it's ideal for ATM's. The helical Crayford looks like it would be a bit easier to print, so designed this one first. The book that taught thousands of people about astrophotography has been completely revised and updated in this second edition. Precision StainlessHardware: All stainless steelEyepiece Lock: Non-scratching nylonFriction Screw: Teflon tipped stainless. Includes 1.25" adapter. T-2 adapter with T-2 thread and 1.25" connector10mm focus travel for small focus adjustmentscompression ring so its gentle on your 1.25" accessoriesfor all devices with a T-2 thread connectioncan also be used for eyepieces with a T-2 thread. You would move the draw tube in and out until the image was in focus and then turn the PVC ring so it would lock the draw tube in . BJ Drew
East Lyme, CT, Joe;
 
Received the focuser ordered from you. Buy Celestron repair parts at High Point Scientific. Please place your order now, so that we may take into account your order and deliver the article to you by the above-mentioned date. It is therefore optimal for solving simple focusing problems. The scale itself is similar to the millimetre markings on a ruler, but each marking here moves the focuser by only around 0.1 mm. However, it can skew the optical axis significantly and . Shop Quality & Best Monocular/Binoculars Directly From China Monocular/Binoculars Suppliers. Now by building my own big Newton I find there are no focuser offered by the
German-market optimized for Dobsonian scopes. Secondary Mirror (2.5" Minor Axis) with Astrosystems Holder (Pre-owned) Add to cart. On the accessories side, it has a mounted T-2 thread as well as a 1.25" receiver. 278 336 12. Once you know, you Newegg! (SPECIAL PRICE) US $117.60 | Buy StarPal 2 Inch Focuser Telescope Speed Astronomy Reflector Telescope Monocular Type For Eyepiece For Monocular Astronomic From Vendor StarPal Outdoor Store. In order to make the scope as compact as possible, the Heritage features a lightweight 1.25" helical focuser. After hundreds of HC-2 focusers sold, we started to receive an increasing interest for a 1.250" version, including interest from several custom telescope makers. It should look nice. The focuser can take 2" or 1.25" eyepieces. by Buback Nov 7, 2011. Helical Crayford Telescope Focuser Model HC-1. Lumicon Low-Profile Focuser for 3 Inch Newtonian Base is a high-precision, pin-and-groove type helical 1.25" focuser. This enormous load-bearing capacity is inherent in the design, meaning the focuser tube cannot slip. I also want to express my feelings on how satisfied I am about the fact that several spare screws and teflon balls were included. Setting scale - for finding the optimal focus position again. Corresponding stainless steel spacers, HC-1-15A. Adjustment is made by turning the eyepiece. I saw a couple of your fantastic focusers at Stellafane this month and loved them. The helical focuser has a 2" barrel. The CR1 has extremely smooth focus action due to all bearing riding surfaces polished to a near mirror-like finish before anodising. Once the helical focuser is attached, simply turn the oversized focusing knob - which you can control easily even with gloves on in winter. Antares Low-Profile Helical Focuser for Newtonian telescopes The short 2" focuser is ideally suited for self-construction of visually optimized telescopes. Free shipping. Found inside – Page 5This arrangement , similar to the helical focuser used on fast Newtonian telescopes , was born out of the necessity of providing sufficient focusing adjustment , with reference to the small back focal length of the Slevogt design . If you need the article earlier, we can rush it for you for an additional price. These focusers do not easily fit the Meade Schmidt-Newt scopes! $38900. Holds up to 13 Pounds. TS 1.25"" Concenter - Newtonian Adjustment Tool.
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