Secondhand & Stock

LuntSolarSystems - Calcium Blocking Filter Modul with B1200 - 2'' in extension tube with T2 and 2'' connection

Item condition: new and original packed

BRESSER Messier 8" Dobsonian The BRESSER Messier 8" dobsonian is simply a breakthrough. Despite of its low price this telesccope offers a versatility and quality rivaling a lot more expensive telecopes. The optical diameter of 203mm (8") does not restrict your observations on solar system objects like the moon or the planets - you can reach farther into the sky and explore globular and open clusters, nebulae and galaxies. With that telescope those objects are beginning to show structures: globular clusters are no longer only fuzzy blobs, but are resolved into masses of individual stars. Nebulae, that can only be barely detected in smaller scopes, reveal structures within. The telescope is setting a new standard in versatility: the excellent Hexafoc focuser boosts a free diameter of 65mm (2,5") so that you do not have vignetting in big widefield eyepieces that is caused by smaller focuser barrels. The big altitude wheels handle those big, heavy eyepieces without problems - and when you intend to load even more (like a binocular viewer with two eyepieces) then you can move the tube in its tube rings and achieve balance within seconds. The excellent rigidity of the focuser makes focusing a snap - even for astrophotography. This is another virtue of this highly versatile telescope system: you can remove the altitude wheels from the tube rings, attach a dovetail and use the optical tube on a equatorial mount for astrophotography - in minutes. The focuser is handling even heavy cameras tilt and shifting-free. You are extremely demanding in your image sharpness? No problem - with the optional 10:1 gear reduction sharp images are easy. If you consider, that the focuser is that part of the telescope that is used most often, you will recognize the quantum leap this Hexafoc represents in a telescope of this price range. With the included standard accessories (LED-finder and 25mm SPL-eyepiece) the telescope is ready for observing. If you need to transport or store the telescope as compact as possible you will like this: the rocker box of the 8" BRESSER Messier assembles and disassembles extremely easy and fast due to the use of metal standard furniture fasteners. So you can transform the bulky rocker box into a handy flat package of boards. This telescope is setting a new standard in usability, versatility and performance in its price class. Newton optics with parabolic primary mirror made from H-PZ33 low expansion glass material 2.5" HEX focuser with rack & pinion drive Large altitude wheels provide smooth and precise movement even at high magnifications Red dot finder and SPL 25mm eyepiece included 6-point flotation system mirror cell for the for primary maximizes optical performance Tube rings facilitate the use of the optics on equatorial mounts The parts or the rocker-box are connected with metal furniture fasteners for easy assembly and dissasembly Diffraction limited optics: Strehl > 0,8 FEATURES primary mirror diameter: 203 mm focal length: 1218 mm 2,5" HEXAFOC focus primary mirror out of special-purpose glass with little thermal expansion shifting-free focusing, even with heavy accessories easy to move the tube dismountable rocker box optics can be attached to other mountings differently sized adjusting- and lock-screws SCOPE OF DELIVERY newtonian reflector LED viewfinder 25mm SuperPloessl eyepiece (Ø 31,7 mm / 1,25") 1 extension shell 37,5mm for 2.5" Hexafoc 1 eyepiece adapter Ø 31,7 to 50,8 mm 2 tube clamps 2 altitude wheels 1 rockerbox with 2 ground boards and assembly material Specifications: Type of telescope: Dobson Tube material: Stel Aperture: 203 mm Focal ratio: f/6 Secondary diameter: 57mm Focal length: 1218 mm Mirror material: Special low expansion H-PZ33 Secondary material: Borosilikat-Glas Focuser: Excellent 2,5" Hexafoc Focuser with possibility to upgrade to a 10:1 reduction Connection to eyepiece: 2" / with adapter 1 1/4" Viewfinder: LED Viewfinder Tube weight: ca. 25.3 lb

Item condition: new and original packed

The Altair 395nm NUV filter selectively passes light of the two main Calcium wavelengths emitted by the sun: CA-K line at 393.37nm, and the CA-H line at 396.85nm. A specially developed multilayer interference coating results in transmission of approximately 75% at 395nm NUV wavelength. Bandwidth is approximately 7nm (FHWM), resulting in extremely high contrast in the selected wavelength with efficient blocking of unwanted wavelengths. Remaining UV and IR light between 400-1100nm is blocked at OD3 0.1%, and visible light between 400-700nm at OD4 0.01%. Imaging the sun: The filter is to be placed in front of a high speed CMOS video camera for displaying detail in the upper solar atmosphere, at the boundary between the photosphere and the chromosphere. Structures which cannot normally be seen by the human eye or cameras are revealed, including fast-evolving Ellerman bombs (micro-flares) and Plages, (bright networks near sunspots). Solar granulation is also enhanced, as well as umbral detail around sunspots. Imaging the planet Venus: The planet Venus also benefits greatly from higher contrast in the upper cloud layers, showing features normally invisible in white light. The high transmission allows fast frame rates. IMPORTANT: The 395nm wavelength is harmful and almost invisible to the eye, therefore the NUV filter is intended for photographic use ONLY. A pre-filter of at least OD3.8 is required to reduce radiation damage to the filter. A Herschel Wedge, such as the Altair Imaging-Ready Solar Wedge can be used, or solar film, provided the manufacturers instructions are followed correctly. Refractors are usually employed for solar imaging, however reflectors can be used, provided they have a large blocking filter over the front aperture (usually solar film or glass filter because Hershel Wedges cannot be used with reflector telescopes). Imaging requires a monochrome CMOS camera. A typical example with false colour and selective contrast processing is shown opposite (HDR filter, Photoshop). Specification: NUV transmission band, CWL 395nm FWHM 7nm Filter substrate: 1.85mm thick BK7 optically polished glass with 30 arc sec parallelism UVIR blocking: UV and IR light between 400-1100nm is blocked at OD3 (0.1%) Visible light blocking: Visible light between 400-700nm at OD4 (0.01%) Scope of Delivery: Filter Specifications: Cell: Aluminium Type: Interference filter Filter thread / size: 1.25"

Item condition: new and original packed

0.77X REDUCER/FLATTENER FOR ESPRIT-150ED TRIPLET Designed specifically for the Sky-Watcher Esprit-150 ED Apo Refractor, the new three-lens Focal Reducer/Flattener has a reduction factor of 0.77x. It comes with a standard adaptor with M48 thread edge and 55mm back focus for use with Sky-Watcher's M48 Canon EOS (code 20237) and Nikon (code 20238) adaptor rings. After removing the adaptor, an M71x1 internal thread with maximum 75mm back focus is available for self-made adaptor solutions. The Reducer/Flattener produces a fully illuminated and corrected image circle of 34mm diameter and is therefore perfectly suitable for image formats up to APS-C but can also be used for full format. Scope of Delivery: Esprit 150ED Focal Reducer / Flattener 2 screwable dust covers Adapter to M48 thread Specifications: Coating: multi coating Reduction:: 0,77x Connection to camera: M48 thread

Item condition: new and original packed

Baader Adapter AP2.7"a-M68a-M60a-T2i

Item condition: used Item with possible small cosmetic deffect, but every function works perfect

Wichtiger Hinweis zur Mehrwertsteuer:
Dieses Angebot unterliegt mit Ausnahme der Versandkosten gemäß § 25a UStG der Differenzbesteuerung, weshalb auf den angebotenen Artikel keine Umsatzsteuer erhoben und ausgewiesen wird.

Baader 2.7" ( internal thread AP) counter ring

Item condition: new, but not original packed

Wichtiger Hinweis zur Mehrwertsteuer:
Dieses Angebot unterliegt mit Ausnahme der Versandkosten gemäß § 25a UStG der Differenzbesteuerung, weshalb auf den angebotenen Artikel keine Umsatzsteuer erhoben und ausgewiesen wird.

VIXEN DOVETAIL PLATE MOUNTING BLOCK For installing an optical tube with the standard dovetail attachment. Usable with ATLUX Accessory Plate, ATLUX Base Plate or SX Accessory Plate DX and for mounting optical tubes; Mounts: Sphinx, GP2, GPD2, Atlux wt. 7.76 oz Delivered with: DOVETAIL PLATE MOUNTING BLOCK

Item condition: new and original packed

GPCAM3 178C USB3 Monochrome Guide / Imaging / EAA Camera The Altair GPCAM3 178M Monochrome camera has the sought-after Sony IMX178 Mono CMOS sensor, with extremely low read noise, wide dynamic range, and 6.3mp resolution (over 4K!). SPECIAL OFFER! FREE 1 YEAR SharpCap PRO License with all Altair GPCAM3 Cameras! Click here for more SC PRO feature info. Just download the latest SharpCap, connect your camera, register when the screen pops up and sign up for your free license. Sharpcap PRO has the amazingly accurate guidescope polar alignment routine, focus assistance, live flat field subtraction and many more great features to make deepsky, EAA or solar system imaging that much easier. Download SharpCap now to take advantage of this special offer. Solar system imaging: The GPCAM3 178M is also capable of solar. lunar, or planetary imaging (video capture) allowing detailed images with refractors of less than 3 metres focal length, where small pixels (only 2.4x2.4um), high frame rates, and low read noise get the most detail. The ROI (Region of Interest) feature can be used for even higher frame rates when imaging the planets, sun or moon at high magnification. EAA & Video Astronomy: The GPCAM3 178M is particularily attractive for Electronically Assisted Astronomy / Video Astronomy because of it's high 6.3 Megapixel resolution and high sensitivity thanks to Sony STARVIS back-side-illumination (BSI) and Exmor-R technology. Using the Live Stacking features in the free AltairCapture software or SharpCap PRO). Time-lapse all-sky imaging and video is fully supported, and the camera can be used with a DSLR lens to image large areas of sky. Deepsky astro-photography: Camera has amp glow suppression, and you can effectively remove any remaining amp glow by using the "Live" darkframe subtraction in AltairCapture or SharpCapor, or with with darkframes during processing as usual. To get an idea of what this camera is capable of, click here to view a lunar image by UK customer Neil Phillips (with Hypercam using same sensor).(Opens new window, compressed .JPEG file) To sum it up, the most desirable features of the IMX178M sensor are: Large 6mp sensor 7.37 x 4.92mm SONY STARVIS and Exmor R Technology with a sensitivity of 2000 mV or more per 1µm² Low read noise, approx. 0.9- 2.2e electrons (e-) or more. Saturation (full well) capacity approx. 15Ke- electrons (e-) High Dynamic Range with 14 bit ADC for high image quality in both light and dark (high contrast) areas. Speed and reliability in one camera: USB3.0 and on-board memory buffering give much faster transfer speeds than the GPCAM USB2.0 series, pushing the USB3.0 format to the limit, yet within a stable envelope. Memory buffering almost completely eliminates dropped frames and corrupted video files, a common problem with USB cameras, and enables faster more consistent frame rates, even with less powerful notebook computers. Consistency and stability is improved for video capture sequences - especially desirable for scientific applications. QUALITY software and drivers included: Unlike cheaper cameras, Altair Astro has spent considerable time developing the extensively featured and intuitive AltairCapture software, which can be downloaded from cameras.altairastro.com. AltairCapture is a stable 64 bit Windows application, which allows full control of the camera in high speed video or still mode. It includes extensive automation features, and supports all the major file formats useful for astro imaging and professional scientific imaging in 14bit or 8bit mode. Furthermore, the popular PHD Guiding, SharpCap PRO , APT and NINA are also natively supported. ASCOM drivers are also available for download at cameras.altairastro.com where you can also get regular driver updates. The installation process is easy, and unlike with cheaper cameras, you don't need to be a computer expert to make your camera work. Wide compatibility: Although the GPCAM3 is a USB3.0 camera, it is also fully compatible with USB2.0 ports when a longer cable and less speed are required, for example in deepsky or video astronomy using the live stacking features in AltairCapture or Sharpcap. Windows 7 to Windows 10 software is widely supported by AltairCapture in 64bit mode (see technical info for details). Autoguiding: The camera has an ST4 auto-guiding port, and can be used to auto-guide with mounts from all the major manufacturers supporting ST4 format, including iOptron, Celestron and Skywatcher. The sensor is more than sensitive enough for autoguiding. Support & warranty: Altair delivers proper on-shore English-speaking UK/EU support with a 2 year manufacturer warranty against defects in materials and workmanship. Now just try that with a Chinese camera! New users should definitely visit the Altair Astro Google User Group where you can get answers to technical questions, as well as sharing tips and techniques, to get the best out of your camera. The AltairCapture software interface supports most European languages including English, German, French, Indonesian, Japanese, Korean, Polish, Russian, Chinese, Spanish, Thai, and Turkish. File formats: The camera can be fully controlled in AltairCapture and SharpCap to output uncompressed .AVI and .SER video files for solar system imaging, as well as all common still image formats such as .JPEG .PNG .TIFF .BMP, and .FITS (for deepsky imaging) to mention just a few. The IMX178 Sensor supports 8bit or 14bit ADC output. The 14 bit output mode can be used for deep sky imaging with less frames needing to be stacked and a wider pixel intensity range. The sensor sensor is extremely sensitive and a good candidate for video astronomy, especially with small refractors (final .FITS file is stretched to 16bit for post processing compatiblility). Find out more about bit depth here. Find out more about video & file formats here. What’s different about the GPCAM3 platform compared to the GPCAM1 and GPCAM2? GPCAM3 has additional electronics for USB3.0 support, and to make space for the FULL SIZE USB3.0 connector. (We feel USB micro connectors are not a good idea for imaging because they don't maintain a reliable connection and wear easily, so we used full-size dual port connectors on this camera). Better control with Trigger Mode: "Trigger Mode" is fully supported to make long exposures of over 5 seconds easier to control. With most CMOS cameras, in normal video mode, the camera controls are "locked up" during a long exposure, so you have to wait for the exposure to complete before the camera will accept any commands. So you have to wait to abort a frame if a cloud covers the view, or make routine changes, say gain (ISO), exposure duration, re-aligning or refocusing on the object. However in "Trigger Mode", you can now stop the camera instantly (even if you are half way through a long 30 second exposure) change the settings, and re-start the camera looping again. For long exposures "Trigger Mode" is essential. Of course you can use normal video mode at up to 5 second exposures for video astronomy and solar system imaging. The GPCAM3 also has improved circuitry to improve data transfer stability at high frame rates (reducing dropped frames) and to increase compatibility with a wider range of PCs. This gives a more consistent data transfer rate over USB buses on laptops or desktop PCs. Included in the box: Camera body. 1.5m High-speed USB3.0 cable. 1.5m ST4 guide cable. 1.25 inch x nosepiece with female 1.25" filter thread on the front. (Optional 2" OD Nosepiece with dual 2 and 1.25" filter threads is available, code GPCAM-2IN) CS-Mount insert (12.5mm back-focus) is pre-installed on camera. (Optional 5mm extension adapter is available for C-Mount lenses requiring 17.5mm back-focus.) UV-IR Blocking Filter with Anti-Reflection coatings. (Removable for sensor cleaning). Plastic dust cap 1.25". Silicon dust cap for sensor. Note: This camera does not come with software in the box. To operate the camera you will need to download the latest camera drivers at cameras.altairastro.com (opens new window) Specifications: Sensor type: 1/1.8 CMOS IMX178 Horizonal Resolution: 3040 Pixel Vertical Resolution: 2048 Pixel Pixel: 6Mpx Pixel size: 2.4µm x 2.4µm Bitrate: 8bit/14bit Connections: USB 3.0 Power Supply: with USB Connection to telescope: 1.25 Inch Maximum exposure length: 5s, with Triggermodus 16 Min. Software: download

Item condition: new and original packed

Altair Premium Positive-Lock Diagonal - Dielectric 2 inch Pushfit The Altair 2" premium diagonal with positive-lock system grips 2" accessories tightly with a small rotation of the top knurled ring, keeping them precisely centred. The CNC machined chassis will hold extra heavy accessories without flexing, and the mirror features a premium 99% reflective dielectric-coating. Ideal for refractors and large eyepieces or binoviewers, the positive-lock has a very light action and only needs a small 20 degree rotation, letting you quickly replace accessories. There's no need to apply excessive force on thumbscrews or normal twist-lock mechanisms to insert accessories. Once you've tried it, you won't want to use any other diagonal again, it's that easy. Other features: Includes a 2" to 1.25" adapter with compression ring for smaller eyepieces. The 2" Pushfit barrel is precision machined and is threaded for use with standard 2" astro filters (M48x0.75mm thread). Blackened interior for high contrast observation of bright objects. A scratch resistant chemically stable dielectric mirror coating enables more frequent cleaning than softer aluminium-coated mirrors. Super-hard black anodising for extra durability. Includes dust caps for both ends, and a foam filled box. Scope of Delivery: Altair Premium Positive-Lock Diagonal - Dielectric 2 inch Pushfit Specifications: Filter thread: 2" / M48 Connection to eyepiece: 2" and 1.25" compression ring Connection to telescope: 2" with integrated M48 Thread Weight: 500g

Item condition: new and original packed

The APM 3" mounting plate with 180mm length is a high-quality Losmandy-compatible mounting unit with a flat support surface. The plate is very solid and also supports heavy telescopes without any problems. The holes and auxiliary threads allow a versatile application. Characteristics: Solid, hardened aluminum (thickeness 12.5mm) for high instrument loads 101.5mm contact surface width for different hardware combinations Beveled edges on the front sides for safe insertion Compatibility (extract): AllMounts with Losmandy compatible fast locking system Losmandy Mounts: GM8, G-11, Titan Celestron Mounts: CGEM, CGEM-DX, CGE Pro Skywatcher Mounts: EQ6, AZ-EQ6, EQ6-R, EQ8 Delivery: Mounting plate 180mm length Specifications: Thickness: 12.5mm Slotted hole 1: centric 100mm Slotted hole 2+3: 19mm from center line - 25mm long Bores: 5x centric, 2 pairs with 22.5 space, 1 pair with 38mm space M6 thread bores: 3x cemtric, 2 pairs with 35 mm space, 3 pairs with 24 mm space Total length: 330mm Width: 3" Weight: ca. 900g

Item condition: new and original packed

To transport your binoculars safely and to protect them from impact and weather, we offer you tailor-made, robust and very stable transport cases. With this case, your binoculars and up to 4 pairs of eyepieces can be safely stowed and transported. The inlet is tailor-made for our 82mm model with 90° viewing position. The locks are robust, the handle is well-dimensioned. Characteristics: Hard case made of durable plastic Robust and durable overall construction Stable locks and handle Tailor-made inlay Preformed for up to 4 pairs of eyepieces and accessories Delivery: Hard case

Item condition: new and original packed

The Altair 2" Solar Continuum filter Enhances sunspots, granulation, and fine photosphere detail. For use with Baader Solar Filter or Herschel Wedge. IMPORTANT SAFETY INFORMATION: DO NOT USE THIS FILTER FOR DIRECT SOLAR OBSERVATION! Must be used together with a professional solar filter or Hershel Wedge with Max. 0.024% transmission placed BEFORE this filter. For reflecting telescopes, we recommend Baader solarfilm on the front of the telescope, then screw the filter into a filter holder, camera, or eyepiece. For refractors, the filter should be positioned just in front of the camera or eyepiece with a Hershel Wedge in place. Do not use this filter without a suitable solar pre-filter in place, because it will permanently damage your eyes or camera! The Solar Contrast Booster works by filtering out UV, IR and visual wavelengths except for a narrow 8nm FHWM green band at 540nm. This greatly increases the contrast of solar features when viewed with the naked eye, colour or mono camera, revealing more detail around sunspots and granulation (fast-developing solar convection cells) in the solar photosphere. Highly recommended for use with either Altair Imaging-Ready APM Hershel Wedge or Baader Solar Film. NOTE: Do not insert the filter before your Hershel Prism or it will melt, it should be placed just in front of the camera, and it should be screwed directly into your camera 2" nosepiece by means of the M48x0.75mm thread, E.g. Hypercam 2" nosepiece or use an Altair Magnetic Filter holder with 2" filter slider (Search product code starting with "MAGF" and choose the correct threads for your camera). Why is transmission centred on 540nm wavelength? 540nm is a very desirable wavelength for imaging and observing the sun. The Solar Contrast Booster filter improves performance of any telescope optics such as Refractors, Newtonian reflectors, Maksutovs, Dall Kirkhams, Cassegrains, and SCT's. It's especially recommended with Frauenhofer Achromatic refractors and short focal length ED Doublets, because their optimum performance peaks in this green wavelength by design. In fact, not only Achromats, but most ED triplet and APO refractors traditionally have peak performance at 540nm wavelength, where the human eye shows best sensitivity. 530-540nm is not only the traditional "design benchmark wavelength" for most telescope optics, and also that of most high end interferometry equipment used to configure and optimise telescope lenses. Most colour and mono CMOS cameras also have peak sensitivity and resolution in green! Colour CMOS cameras in particular have an RGGB pixel layout with two green pixels for every one blue and red pixel, for an obvious increase in resolution. The are therefore many benefits in isolating this wavelength to capture those fleeting moments of good seeing. Altair Solar Contrast Booster filter specifications: Standard 2" Filter Thread Aluminium Cell Band CWL540nm 90% transmission FWHM 8nm 1.85mm thick optical glass λ/4, Parallelism (arcsec) 30" Si02 "hard" overcoat with UVIR Block 300-1100nm and Anti-Reflection Coating Scope of Delivery: Solar Contrast Booster Filter 2"

Item condition: new and original packed