Lacerta 200/800 Photo-Newtonian

Lacerta Fotonewton optimized for astrophotography Our optimized Newton combines high-end features with economical construction where it is possible without compromise. We have created our own brand, which the most active and best photographers like to use - because the optical quality and reliable stability have gotten around. Pictures speak louder than words: Who photographs with Lacerta Fotonewtons? Michael Jaeger Markus Blauensteiner Jens Zippel HerbertWalter Rochus Hess Michael Smith Tommy Nawratil Peter Kohlman what's new in the 2021 edition? Even the tried and tested can still be improved! The new Lacerta photonewtons received: Newly designed 9-point primary mirror cell with hanging and height-adjustable primary mirror Ring screen integrated in the HS cell (instead of retaining clips) front end ring and fixed secondary mirror spider in one piece specially designed hexagonal CNC tube rings new 5mm thick carbon honeycomb tube Assembled and individually tested in Austria The LACERTA photo Newtons do not come from the Far East, but are assembled from components (which mainly come from Austria, Germany, Hungary, China, Japan and Taiwan) by our workshop master Peter Kohlmann in Austria. He is ultimately responsible for the precise fitting of all parts, the adjustment of the OctoPlus focuser and the stable assembly. Each specimen is finely adjusted and the optical quality tested with an artificial star at a distance of 40 meters. The tests are assessed together with our optics expert Tommy Nawratil, and the optics are then approved or exchanged. Carbon tube - made in Germany Carbon tube is not just carbon tube. The quality criterion "made in Germany" speaks for itself, our Klaus Helmerichs knows exactly how they have to be wrapped. The carbon tubes are 5mm thick and have a woven structure on the inside: increased stability and yet weight saved! The tubes are painted white in order to radiate the least heat upwards at night and absorb it from below. Primary mirror mount - designed in Vienna A completely new litter by Christopher Teppan and Peter Kohlmann, well thought out and thoroughly optimized with Finite Elements and Plop, including several years of self-sacrificing test phases under the Namibian starry sky! The most important properties: Precisely positioned 9-point support for the primary mirror (one is amazed at the differences in primary mirror deformation that can result from the positioning of these 9 points!), Elimination of the optical interference caused by clamps by a full metal CNC ring aperture (not a cheap 3D printer part with a blurred edge, which is offered again and again by many "experts"), Possibility of individually setting the distance between the primary and secondary mirror (if you want to change the focus position for other accessories) Adjustable primary mirror fit, no wobbling around or deformation from pressure completely absorbing the force and focus shift by panning from zenith to horizon, ...and much more... OctoPlus focuser - assembled in Austria: A focuser with maximum stability, already in the 3rd generation with oversized bearings, developed and built by Peter Kohlmann. The coma corrector is kept stable on the axis by the slip fit in the draw tube, but is fully rotatable. The Centerlock clamp designed by G. Perger (Hungary) and further developed by us holds it securely in position, even with an eccentric filter wheel and with a load of several kg (up to 4kg already tried). When we say "stable", it doesn't mean "a bit more stable than other slides", but REALLY stable. We tested the lateral bending forces and minimized deviations, and the results speak for themselves. The OctoPlus focuser is prepared for a LACERTA MFOC motor focus with 1 micron reproducible focusing accuracy and with an optional temperature sensor. Customer quote (Rochus Hess): "The focuser is actually very stable and the corrector fits perfectly into the focuser, you didn't promise too much" Customer quote (Bernd Weinzierl): "Tommy, I love this part!!! Perfect clamping, no tilting, no shifting, how could I have done without the Octo???" Tube lined with velor on the inside - it couldn't be blacker The inside of the carbon tubes is completely lined with black velor. No (affordable) paint and no other material has such a high absorption coefficient for grazing light. At the same time, the velor acts as an insulating buffer layer for the heat exchange between the tube wall and the interior air, and further reduces the already low tube seeing caused by the white carbon tube. Penetrating moisture is also first absorbed by the velor and the tube stays that way.

Secondary mirror blackened on the side - with steel washer If blackening, then right! Scattered light can also come from the laterally brighter surface of the secondary mirror. The blackening of the rough side surface of the secondary mirror effectively prevents this! The adjustment screws of the secondary mirror are Allen screws, so that you can create a good pull when adjusting. This is important so that the fan mirror remains in position as if it were nailed down even when panning. A steel washer prevents the screw tips from digging into the secondary mirror holder, which often leads to adjustment problems with cheap solutions. We offer to have secondary mirror heaters installed at the same time. The supply lines are laid as flat cables along the spider legs so that they do not protrude. An RCA plug goes into the tube wall. Secondary mirror struts including stabilization ring - milled in one piece from solid material Secondary mirror struts that are too thin warp and bend too easily and are usually screwed individually to the tube. As a result, you have to be careful when adjusting that they are well aligned in order to avoid unsightly fanned-out spikes. The new end ring, including the spider legs and FS holding block, is now cut from a single block of aluminum with a laser beam and reworked with CNC. The deformation behavior between the telescope slewed towards the horizon and the zenith was computer modeled in order to keep the secondary mirror spiders as thin as possible, but at the same time suppress the deformations. The spider legs line up perfectly and neither give way nor can they be misaligned. The end ring also serves as an end reinforcement for the carbon tube and optimally stabilizes the nearby OctoPlus focuser. CNC milled pipe rings - only with Lacerta logo! The hexagonal pair of pipe clamps is also full of ideas. They allow rails to be attached below, above and in 4 other positions (fully compatible with the LACERTA MODULAR system). There are several M6 threads at the top and bottom, they can be re-drilled on the side. A small thing, but you may appreciate it: Nothing sticks out of the Lacerta tube clamps (not even the clamping screws) where a cable could get caught during night-time operation. Unless you want it: There are enough pre-drilled holes with M6 threads if you want to attach accessories or relieve strain on cables... versatile applications: The LACERTA photo newton has a back focus of 55mm above the center lock or the GPU coma corrector, but can be configured in many ways. It is also fully usable visually. For this purpose, the coma corrector can be equipped with an eyepiece sleeve (M48nM54p508). For visual observation without a coma corrector, use an extension under the eyepiece adapter (2x M48M4837). The coma-correcting Düring Barlow as a glass path corrector (APM267x) or the Baader 1.6x coma-correcting glass path corrector are suitable for observation with binoviewers. Photographically, the focal length can also be increased, either with coma-correcting Barlows like the APM16x, or with normal Barlow lenses. If the focus position does not fit, a 12mm sleeve can be removed from the OctoPlus focuser ( Octo60plus12mm ) and you can focus further in. You can also screw on more 12mm sleeves to get further out. The OctoPlus also keeps a corrector on the move when it is not resting - there is no problem using the corrector as a continuously adjustable sleeve and clamping it again. This is just a suggestion to try it out for yourself and discover the possibilities! Customer quote (Michael Jäger): "I've had the Newton in my car for 25,000km and have never had to readjust it." Customer quote (Norbert Mrozek): "You really built a great instrument, I'm totally thrilled. I was able to take the first pictures last night. You keep everything you promise." WE RECOMMEND: We also offer the 4-lens GPU coma corrector as a package for this f/4 photo Newtonian: KomakorrF4 (optical design by Pal Gyulai / GPU / Hungary). Unlike simpler correctors, it does not cause any spherical aberration on the optical axis. To see the difference between the 4-lens GPU and what is probably the best two-lens coma corrector (Baader MPCC), you should open both of the following images in two separate windows and then compare them. Note the fine planetary nebula in the center of the image and the limit size (with friendly permission ONLY for Teleskop-Austria from Burkhard K. from Bondorf - please note the copyright!) www.teleskop-austria.at/info...4-lens-GYULAI.jpg www.teleskop-austria.at/info...-2-lens-MPCC.jpg Specifications 8" f/4 Weight: 11kg (with clamps and Losmandy rail) Length: 790mm Diameter tube 245mm (outside) Tube thickness: 6mm Secondary mirror 70mm minor axis Secondary mirror 535m