Vixen Reducer HD Kit for FL55SS Telescopes

Fast 90 mm high-performance astrograph for demanding astrophotographers and observers with 5 lens elements in 5 groups. Due to the complex optical structure with five lens groups and five elements (quintuplet), including two SD (Super ED) lenses and an ED lens (Extra-low Dispersion) , a virtually aberration-free optical system was created. This revolutionary astrograph is compatible with a full-frame digital DSLR or an even larger 44x33 mm camera. The 90 mm astrograph with fast aperture ratio delivers exceptionally sharp, high-contrast and small point stars from the centre to the corners of the field of view. In addition, it is also ideal for visual observation with a very large field of view but also for planetary observation with high magnification. The VSD90ss is designed so that there is a "long peak range" in the adjustment accuracy of the sharpness, so that photographers can always achieve satisfactory results in astrophotography. Even if the focus is not quite precise, round and sharp stars are still shown throughout the entire image field. Illumination without vignetting In most cases, an astrograph also produces optical vignetting (a gradual decrease in light rays towards the edge of the image) This is mainly caused by rear lenses being shaded by the front lenses. Because of this darkening, it is relatively normal for the photographer to have to further edit the image after taking the picture and also have to do some additional so-called flats before taking the picture. To solve this problem, the VSD90ss uses wide aperture lenses in the rear elements, securing over 90 % of the light volume at the edge of the 60 mm image circle. Since the light intensity is uniform throughout the entire image field of the VSD90ss, there is no need for complex technology to prevent edge darkening. The VSD90ss is coated with the most modern coatings of extremely high reflectivity. These coatings have been specifically developed to optimize the properties of each individual lens element without degrading contrast and light intensity across multiple lenses. Numerous gradations of light bring beautiful point-like stars into the image field The low optical vignetting ensures sufficient illumination and thus eliminates the asymmetric flare caused by bright, diffraction-limited stars. It prevents stars at the edge of the 60 mm image circle from exhibiting deformations such as comets, astigmatism or coma. Since the illumination of the image field is relatively similar from the center to the edge of the image, you can expect excellent star imaging. Please note: *Depending on the recording system used, mechanical vignetting can still occur due to the camera body or incorrect adapters. 96.7％ Strehl for impressive visual observations The VSD90ss offers a flattened large field of view with a low magnification wide angle eyepiece. Even with a high-quality wide-field eyepiece with a large field of view, you can get sharp images of stars in the entire field of view when visually observing! In the centre of the field of view, a Strehl intensity of an impressive 96.7% is achieved at visible wavelengths. This Strehl ratio exceeds that of the SD81SII apochromat at 95.7%, which is known for its excellent optical properties, and this also works excellently when observing the moon and planets at high magnification. The versatile large and stable focuser The VSD90ss has a large focuser with a diameter of 87.5 mm to make optimal use of the large illumination field of 60 mm. With the large extension that is compatible with many accessories, it is perfect for astrophotography up to large format or 35 mm full frame DSLR cameras. Thanks to its precise manufacturing, it is also suitable for very heavy cameras without tipping. The precision locking lever of the eyepiece extension The focuser's extension tube has a locking lever that holds the extension tube firmly in position even when using heavy cameras such as large format cameras or CCD cameras with a large sensor. The locking lever clamps the rack gear to the extension barrel so that the viewing angle or focus on your camera does not shift. Compatible with motor driven focusers An optional two-speed motor focuser (not included) is available for the VSD90ss to provide sensitive focusing. An EAF (Electronic Automatic Focuser) from ZWO or equivalent can also be retrofitted. Optional VSD Reducer for even faster results The tried and tested optional VSD reducer, which was also used on the predecessor, the VSD 100, is also compatible with the VSD90ss. The photographer gets even faster results in astrophotography with an aperture ratio of 1:3.9. CHARACTERISTICS 90 mm aperture, 495 mm focal length (F5.5) Needle-fine stars up to the image field edge in 44x33 mm format 5 lens elements in 5 groups Image illumination up to 60 mm Resolution power: 1.29 Limit size: 11.5 Light gathering capacity: 165x Illumination: 60 mm Dimensions: 115 mm diameter x 600 mm length (476 mm length for storage) Weight: 4.3 kg Connections/Thread: Size thread/84 mm (pitch 1 mm), 60 mm (pitch 1.0 mm), 42 mm for T-ring push fit / 60.2 mm, 50.8 mm and 31.7 mm Solar observation: separately available solar projection approach B Optional VSD100 reducer compatible (opening ratio F: 3.9) SCOPE OF DELIVERY VSD90ss high performance astrograph

High-performance, top-of-the-range fluorite apochromat for mobile astrophotography and observers. Thanks to its small size and lightweight design, this high-quality fluorite refractor is ideal for excursions and air travel. It displays razor sharp and bright stars across the entire field of view of the full-frame image sensor (95% illumination with 44 mm image circle). The FL55SSS turns into a fast F/4.3 astrograph with the optional flattener and focal reducer. It allows you to use extremely short exposure times and a provides a large field of view for large nebulae or comets.Note: To achieve the optimum image quality of the FL55ss, we strongly recommend the purchase of this reducer and flattener set.Despite the small aperture, the FL55SS features a high-resolution HR eyepiece that produces stunningly clear images of the moon and the bright planets. When used for astrophotography, it delivers razor-sharp images of stars that are guaranteed to impress. FEATURES Objective lenses: 55 mm fluorite Focal length: 300 mm F5.5 Resolution and limiting magnitude: 2.11, 10.5 Light-gathering power: 62x Dimensions and weight: 80 x 282 mm; 1.5 kg Adapter and connections: 31.7 mm receptacle, 60 mm thread WHAT’S INCLUDED 55 mm optical tube with fluorite APO Dovetail adapter Extension Tube 60 mmDew cap Dust covers

BRESSER Full HD Deep Sky Camera with autoguider: a great camera for different types of astrophotography and for autoguiding. Not only suitable for planets, but also for deep-sky objects such as galaxies, nebulae and star clusters. Dedicated ToupSky Astro Imaging software supports video preview, video recording, video processing, image capture and processing, dark field correction and raw data output. Easy to use, but with professional results. One of the main features of the new backlit SONY IMX290 CMOS sensor is its high light sensitivity, which makes it possible to detect deep-sky objects without active cooling. SONY has increased the quantum efficiency at 533 nm wavelength up to 77%, which is much better than other CMOS sensors have been able to achieve in the past. Connect this camera to a guidescope and attach the camera's built-in ST-4 port, directly to your telescope's equatorial mount guide port and autoguide - using many popular audioguiding programs (PHD, Guidedog and more). Autoguiding enables you to take accurate pictures with long exposure times of several minutes. Thanks to the extra light-sensitive camera, you now always have a suitable guide star to hand, even using short exposure times. An ST-4 protocol connection cable is also included. Simple automatic tracking at its best. You can use this camera with all guiding telescopes, or off-axis guiders that accept a 1.25 " tube, 1.25" filter thread (M28.5x0.6) or C-mount adapter thread (1 "x1 /32"). IMPORTANT NOTES: This is not a stand-alone guider camera. You always need a Windows 10/11 computer to take pictures and for autoguiding. The autoguider software is not included. You can use PHD2 Guiding, Guidedog, Metaguide, Guidemaster (freeware) or AstroArt, MaxIm DL (paid). DOWNLOAD PHD2-Guiding: https://openphdguiding.org/ DOWNLOAD GuideDog: http://barkosoftware.com/GuideDog/index.html DOWNLOAD latest camera software and drivers: http://www.touptek.com/download/showdownload.php?lang=en&id=2Download INDI Driver: https://github.com/indilib/indi-3rdparty/tree/master/indi-toupbase SPECIFICATIONS Camera type: BRESSER / Touptek GPCMOS02000KPA color Sensor: SONY IMX290 CMOS color, backlit Image and video size: Full HD 1936 x 1096 pixels (video 15 FPS) Native sensor size in pixels: 1936 x 1096 Exposure times: 66µs to 16min Binning: YES, 2x2 Megapixel: 2.1 MP Sensor size in mm: 5.6 x 3.1 Pixel size: 2.9 µm x 2.9 µm Bit depth: 8/12 switchable ST-4 Compatible Autoguider: YES CNC milled housing made of aluminum Protective strap on the camera housing Camera tube diameter: 1.25 "(31.7 mm) Camera connection thread: C-mount + 1.25 "filter thread Computer interface: USB 2.0 C-mount extension tube with 1.25 inch filter thread included No IR cut filter installed Operating system: WINDOWS 10 + 11 ASCOM driver included Field of view for different focal lengths in mm (given in arc minutes): 400mm - 48.2 'x 27.3' 500 mm - 38.6 'x 21.8' 600 mm - 32.1 'x 18.2' 700 mm - 27.5 'x 15.6' 800 mm - 24.1 'x 13.6' 900 mm - 21.4 'x 12.1' 1000 mm - 19.3 'x 10.9' 1250 mm - 15.4 'x 8.7' 1500 mm - 12.9 'x 7.3' 1750 mm - 11.0 'x 6.2' 2000 mm - 9.6 'x 5.5' SCOPE OF DELIEVERY Full HD camera C-mount adapter USB 2.0 PC connection cable with a length of 200cm Interface cable for ST-4 autoguider port with 150cm length Dust cap for camera tube Software CD

NOTE: This item is a used or returned product. This means: The item may show slight signs of use; some accessories may be missing; the packaging may differ from the original packaging. Please note that refurbished items generally come with a 12-month warranty.

Converts the FL55SS into a high-performance astrograph The kit consists of a high-performance flattener lens, a reducer and the EX TUBE 66 connection ring, which was developed for the FL55SS Fluorite Apochromatic Refractor and improves photographic performance by dramatically flattening the surface. Ultra-sharp image over the entire field of view of the DSLR full-frame sensor The Flattener HD for the FL55SS reduces the change in the focal length of the FL55SS to a minimum and improves the evenness of the surface for prime-focus photography. The 44 mm image circle covers the entire field of view of a full-frame DSLR camera. When used in combination with the HD5.5 Reducer, the focal length is reduced by 0.79x (from f5.5 to f4.3) and the image circle retains a diameter of 44 mm, which significantly improves the sharpness across the entire field of view of DSLR cameras with a full-frame sensor. 96% light volume to the edge of the field of view The Flattener HD was specially developed for the FL55SS refractor to reduce loss of light to a minimum across the entire 44 mm image circle of full-frame DSLR cameras. Exceptionally high contrast The same anti-reflective AS coatings used on our high-end VSD 100 f/3.8 astrograph are used to provide an outstanding light transmission of 99.9% per lens surface. Thanks to the matte black surface of the Reducer HD kit, loss of light, ghosting and scattered light and largely prevented. FEATURES Ultra-sharp image over the entire field of view Designed for full-frame cameras Illuminates 44 mm image circle Cutting-edge AS coating DELIVERY CONTENT Flattener HD kit for FL55SS 66 mm extension tube Dust caps

The Pulsar Observatory Dome provides a high quality, secure and practical housing for your telescope. Providing excellent weather protection for you and your telescope, it allows you to have your instrument ready for use at all times. Whether imaging or visual, having the convenience of a permanent set up adds greatly to your enjoyment of exploring the night sky. Ideal for up to 12" (30cm) aperture telescopes and a variety of installations, also ideal for societies, schools, etc. The Pulsar Observatory dome is sectional in design, and is delivered in kit form. Alternatively, we can provide a complete installation service for you. Please Ring for details. The Pulsar Observatories 2.2 metre full height dome benefits from many advanced features.FEATURES Finest quality, weather proof GRP finishHigh quality locking system Simple design for self assembly Motorised dome rotation available Motorised dome shutters available Accessory storage bays availableAvailable in white (other colours - please call)Dimensions: Total Height approx 2.47 metres Dome Diameter approx 2.2 metres Door Height approx 1.1 metres Dome Aperture approx 0.6 metres CUSTOMER REQUIREMENTS: Before you place the order of any Observatory Dome system please make sure that your department of planning and building inspection does agree. Probably you need a certain building permission.The customer will need to provide a level concrete base to ensure secure fixing and dome operation. Have a look to our installation guide which gives you an example for a suitable base dimension. Various upgrades and accessories are available. The 2.2 metre Observatory Dome is available in white - for other colours please call. We can also supply a steel pier, that will complete the permanent installation of your telescope, giving you more space within the dome than your existing tripod. We can also fabricate custom height piers to suit your requirements. VIDEO:  https://www.pulsarastro.com/video-guides-27-w.aspFAQ:  https://www.pulsarastro.com/faqs-28-w.aspIMPORTANT NOTES:THIS PRODUCT CAN`T BE ORDERED ONLINE BUT BY PHONE CALL OR E-MAIL.  AFTER PLACING THE ORDER YOU WILL RECEIVE A SEPARATE SALES CONTRACT FROM BRESSER.THERE WILL BE A DELIVERY CHARGE FOR THE OBSERVATORY, PRICE ACCORDING TO LOCATION - PLEASE E-MAIL US OR RING FOR DETAILS. AVAILABLE FROM STOCK IN GERMANY OR FOR CUSTOMIZED PRODUCTS THE DELIVERY TIME IS: 6-8 WEEKS APPROX. Save cash money ! PULSAR domes are transported safely on oversized, individually manufactured pallets with special dimensions, which quickly make transport by freight forwarder expensive. Therefore, it would be possible for all customers to pick up their own PULSAR dome with their own transporter or trailer from BRESSER GmbH Rhede/Westphalia, GERMANY, by arrangement.

The TELRAD viewfinder is a projection finder that can be installed on any telescope and makes it child's play to align the telescope with the starry sky.The TELRAD viewfinder is a practical alternative to classic optical viewfinders and illuminated red dot viewfinders. You can see the complete starry sky without magnification, and not just a small section as with a normal optical viewfinder. Against this background of the starry sky, three red luminous concentric rings are projected, with apparent diameters of 4 degrees, 2° and 0.5° in the sky. Move the telescope so that the object you are looking for is in the inner ring, and the telescope points in the right direction. Because the object you are looking for is inside the ring, it will not be irradiated like a normal illuminated red dot finder.The base of the TELRAD viewfinder is self-adhesive and can be mounted on all telescopic tubes from about 10cm diameter. The length of the base is about 18cm. This base remains on the telescopic tube, the TELRAD viewfinder itself can be removed or attached at any time by means of the attached quick coupling. The TELRAD is powered by two normal AA batteries (not included).There are star atlases, like the "Deep Sky Travel Atlas" from Oculum-Verlag, and planetarium programs for the PC, like the program "Stellarium", where the three rings of the TELRAD are already drawn or can be displayed around the interesting celestial objects. This makes finding these celestial objects a real walk.FEATURESTELRAD projection finderIlluminated rings of 4 degrees, 2° and 0.5° in the skySee the complete starry sky without magnificationEasy installation and useCan be installed on nearly every telescopesBase with quick release coupling included Powered by two AA batteries (not included) Very long battery life because of LED technologySCOPE OF DELIVERYTELRAD viewfinder with projector and battery compartment TELRAD base with quick-release coupling for the viewfinder Adhesive tape for attachment to telescope