ISA Space Exploration NASA-themed Telescope AR-90/900 EXOS-1/EQ4

A new 81 mm apochromatic refractor with high-performance Super ED glass (= SD). The advantage of these SD refractors is their short length and low weight.The FPL53 glass reproduces an extremely clear and sharp image due to an exceptionally high elimination of residual colour errors. The SD glass is designed to bring all rays of violet, red, blue, yellow and green together very precisely on the same plane. Thus, the special lens material reduces chromatic aberration across all colours.The new Vixen SD81SII no longer uses spacer plates, which leads to significantly better image quality, especially with bright stars. This means that there are no more spikes on the stars in photographic images, which were otherwise produced by the spacer plates. You will be thrilled when you look at the moon or the brighter planets and observe the moon craters pin sharp and with an extremely high contrast. Observe the ring planet Saturn or the cloud bands on Jupiter.But of course, brighter deep sky objects such as the Orion Nebula or the Andromeda Galaxy can also be observed impressively.In combination with the new optional SD Reducer HD Kit or SD Flattener HD, this refractor allows illumination with a 44 mm image circle for full-frame SLR cameras.The older ED81SII, ED103S, ED115S refractors were originally designed for the visual observer or the photographer using APS-C cameras. However, the new SD series has been optimised for use with full-frame cameras by inserting new inner baffle rings.The large 60 mm focuser allows heavy cameras to be attached without tilting. The supplied flip mirror allows comfortable observation, even in unfavourable observation situations, and also offers a T2 thread for connecting a DSLR camera.Thus, observing in degree view or at a 90° angle is possible. The carrying handle attached to the tube clamps ensures a secure hold when transporting the telescope.FEATURESObjective Lens: D=81 mm, multi-coated 2-Lens SD Apochromat without spacer plates No more spikes on the stars Focal Length: 625 mm (f7.7) Resolution and visual limit: 1.43 arcseconds; 11.3 Mag Light gathering capacity: 134x unaided eyesDimensions and weight: 90 mm dia x 585 mm, 3.6 kg Finderscope: XY Red Dot Finder II Adapter and connections: Adapter thread 60 mm and 31.7 mm for T2-ringConnection 50.8 mm and 31.7 mm socket with flip-mirror diagonal mirrorPhotography: primary focus and eyepiece projection SCOPE OF DELIVERY Refractor telescope SD81SII Tube rings Flip mirror system Carrying handle Dovetail rail Red dot viewfinder

NEW - now including a high-quality aperture Solar-filter for safe observation of sunspots, eclipses and planet transits. Great telescope for night and solar observation.The combination of large aperture and short focal length predestine the BRESSER Messier AR-152S for the observation of large celestial objects. Experience the famous globular cluster M 13 in the constellation Hercules: Thousands of pinpoint stars stand before a black sky like so many diamonds spilled onto black velvet. Equipped with nebular filters you can watch the Gulf of Mexico in the North America Nebula and all the other celestial objects that Charles Messier listed in 1781. The compact size of the Messier AR-152S combines outstanding tranportability, high light gathering power and low weight for a telescope of this aperture. The special four lens construction delivers a better perfomance than a classical two lens achromat of this focal length. This telescope is only an optical tube without mount and tripod.FEATURESOptical design: refractor telescopeLens diameter: 152 mm / focal length: 760 mm / F/5Maximum recommended magnification: 254xTelescope for night and solar observationHigh quality BRESSER refractor opticsUniversal telescope for planets, double stars, planetary nebulae and deep-skyExcellent focuser with 2,5" (65 mm) open diameterFour lens construction8x50 straight through viewfinder reticleoptimized finder socket for comfortable useCradle rings with handle and integrated piggyback camera holder (1/4 thread)Smartphone camera adapter for sky navigation includedUniversal 44 mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5)50,8 mm (2") to 31,7 mm (1,25") adapter with integrated T2 thread (T2-adapter ring for your camera is needed)Backfocus: 150 mm behind Hexafoc with attached 2" eyepiece adapterCollimatable lens cellSCOPE OF DELIVERYOptical Tubeaperture solar-filter26 mm Super Plössl eyepiece (31.7 mm / 1.25")31,7 mm (1.25") diagonal mirrorintegrated 31.7 mm and T2 adaptertube rings with universal 44 mm Dovetail plate with stainless steel rail (fits LXD75/Great Polaris/EQ5)handle with camera holderSmartphone adapter for celestial navigation 8x50 Viewfinderastronomy PC software Stellariumrotatable star map

The Vixen A80Mf Porta II telescope set includes everything that an entry-level astronomer needs. The A80Mf is an achromatic refractor with excellent colour correction properties, making it ideal for observing the moon and the planets. It is also suitable for observing bright nebulae. The PORTA II mount is not just popular among beginners – it also allows experienced astronomers to mount their devices quickly and easily. The PORTA II features a high-quality design and comes with a fine adjustment function for both axles. The PORTA II does not require a clamp, as it sports a slip clutch that allows you to adjust the position to your desired object. It automatically holds its position, making it easy for users of all abilities to operate. FEATURES Objective lenses: 80 mm 2-lens achromat, multi-coated Focal length: 910 mm (f11.4) Resolution and limiting magnitude: 1.45 arc seconds; 11.3 Light-gathering power: 131x Total weight: 9 kg Adapter and connections: 31.7 mm receptacle with T2 connection for cameras WHAT’S INCLUDED Porta II mount A80Mf telescope 2 eyepieces: Plössl 20 mm and Plössl 6.3 mm 6x30 viewfinder telescope 31.7 mm star diagonal Tripod Tripod storage shelf for accessories Shafts for fine adjustment Tube clamps and dovetail adapter Dew cap Mounting tool