Apochromatical Refractors, 2-Lenses, opt. Tube:

Product description The 102mm f/7 ED refractor from Teleskop-Service is an easily transportable "all-round telescope" for visual observation and astrophotography. The well-corrected optics offer an almost color-clean image thanks to the moderate aperture ratio and the ED glass used. Use the Apo refractor for astrophotography or for impressive visual observations. The good optics, the "photo-friendly" 2.5" focuser and the good workmanship guarantee joy, success and wonderful experiences under the starry sky. The lens is embedded in an adjustable and temperature-compensated cell. The system is two-lensed, with an ED element for good correction of the chromatic aberration. TS uses the best possible multi-coating from the manufacturer on every glass-air surface for optimal contrast results. With its aperture ratio of f/5.5, this apochromat is faster than most other apochromatic refractors we know. The high light power has several advantages. The usable field is increasing, especially in photography. In addition, the short f/ratio enables shorter exposure times, both in the field of astrophotography and nature photography during the day under extreme conditions. We offer suitable correctors for very good field sharpness. The precise focuser and the powerful optics make the 102mm ED refractor a good telescope for astrophotography. To correct the image field, we recommend some correctors that we have linked in the accessories section. Characteristics: Good quality doublet-ED lens Aperture 102mm, focal lenght 714mm, f/7.0 Multi-coatings on any glass-air surface 2.5" R&P focuser with micro reduction Femal threads M68x1 and M63x1 for correctors and reducers Delivery: Optical tube 102/714mm Dew cap, retractable 2.5" R&P focuser with micro reduction Reductions to 2", 1¼" CNC tube rings and GP level dovetail

Item condition: new, but not original packed

TS 50 mm f/4 ED Mini Telescope This small telescope delights every aesthete with its imaging. Even at the highest magnifications, an absolutely perfect star is imaged. Landscape and nature observation are also possible. The contrast and sharpness will inspire you. Also the mechanics of this compact refractor is uncompromising and allows perfect working, no matter if an eyepiece is used for observing or a camera for guiding. A powerful yet compact guiding scope Simply plug the autoguiding camera into the 1.25" receptacle or screw the camera onto the T2 thread and focus. You will have no problem with focus. The generous 33 mm adjustment range of the Crayford focuser makes it possible. And even heavy tracking cameras are well supported by the focuser, with no tilt or flexing. Clean pinpoint stars are the reward. Due to the very good star definition, optics up to about 10" aperture can be tracked well. Important: Since the telescope has rigid tube rings, the autoguiding camera should have a larger sensor chip to achieve a large enough field of view to contain a suitable guide star. Alternatively, you can replace the tube rings with guiding scope rings - and also use the telescope as a finder together with a crosshair eyepiece. A great spotting scope for landscape and wildlife observation Use the compact refractor as a spotting scope on vacation. If you work straight-sighted, the image is upside down. But with a star diagonal or Amici prism, the image straightens up. You can use any 1.25" eyepieces and magnifications up to about 100x are no problem for the very good optics. Observe mountaineers in the steep face or watch the exciting feathering of rare birds. Thanks to the multi-function plate with the 3/8" photo tripod thread, the connection to any common photo tripod is possible. A small but surprisingly powerful astronomical telescope You will be surprised what a really good optic with 50 mm diameter can show. Craters and the maria on the moon are just as visible as the spectacular rings of Saturn or the beautiful play of the Galilean moons of Jupiter. But also beyond the solar system many objects like double stars, planetary nebulae or star clusters can be seen. For example, the small refractor becomes a great wide-field telescope with the wide-field eyepiece UFL, which allows you to observe a field of fabulous 7.5° in the sky. With nebula filters, even faint nebulae, such as the well-known North America Nebula, come within your reach. Thanks to the flexible dovetail bar, the refractor can be attached to a photo tripod, a small mount or even a photo tracker. The tube can be split. Scope of Delivery: TS 50 mm ED refractor CNC tube rings Multifunction dovetail bar Allen wrench

Item condition: new and original packed

WILLIAM OPTICS REDCAT 51 F/4.9 PETZVAL REFRACTING TELESCOPE

Item condition: new and original packed

William Optics 1.25" inch RedCat Erecting Prism (for RedCat 51 only) High quality erecting prism with Red anodized plate , the complete housing is made by 6061T Aluminium by CNC . This 1.25" 90 deg. erecting prism will very useful for daytime observations. • Image erecting BAK4 prism with anti-reflection coating. • High accuracy and high light transmission prism. • 1.25" barrel for any 1.25" eyepieces. Unique design & Superior Craftsmanship • Internally matte blackened and threaded for no internal stray light reflection. • Entirely aluminum, silver anodized. Delivered with: Erecting Prism

Item condition: new and original packed

TS-Optics Photoline 150 mm f/8 FPL53 Lanthan Dublet Apo - 2.5" Focuser

Item condition: new and original packed

TS-Optics Doublet SD-Apo 150 f/8 FPL53 / Lanthanglas Objektiv - 3,7" focuser

Item condition: new and original packed

APM Doublet ED Apo 140 f/7 FPL53 OTA with 2,5" Focuser,

Item condition: new and original packed

APM Refractor Telescope Doublet ED Apo 152 f/7 FPL53 OTA with 3.7" focuser

Item condition: new and original packed