BRESSER plan achromatic objective lens 100x

The immersion oil is used as a medium to get focus with a 100x oil objective. Without this oil it's not possible to get a sharp image.Volume: 5 ml

The BRESSER DIN-Objective 100x oil is an achromatic objective with standard diameter to enhance the magnification variety of your BRESSER Erudit DLX or Researcher Microscope. The objective has a parfocal length of 45mm. For use immersion oil is required.It is not recommended for the models Erudit Basic Mono/Bino, as these have a shorter parfocal length.

Fascinating Jupiter, breathtaking Ring Nebula and glowing Pleiades – there are infinite beauties to admire in outer space. With this complete telescope set for beginners, you can explore them with your own eyes, and do so immediately. Everything is included for a quick and easy start in sky observation: the astronomical reflector telescope with 114 mm aperture and 900 mm focal length, the equatorial mount, the tripod and a wide range of astronomical accessories. In addition, the telescope can be operated very easily, even by beginners. The Galaxia is particularly suitable for observing the Moon and planets as well as star clusters and bright gas nebulae. Getting started easily with a true astro-classic – the telescope This set enables you to make your first astronomical discoveries through a classic reflector telescope, a so-called Newtonian reflector. For many beginners, the view through telescopes of this type is rather unusual: you don't look in at the back of the telescope, but at the front and laterally. This way you can always enjoy your observations in a comfortable physical position. Even if the telescope is pointed vertically upwards into the sky, you don’t have to bend down. Another important advantage of these reflecting telescopes: the optics are absolutely free of chromatic aberrations and thus score points with their good imaging properties. Due to its aperture of 114 mm, the entry-level telescope already collects a lot of light from the celestial objects. In addition, 114 mm aperture and 900 mm focal length result in a large focal ratio (ratio of aperture to focal length) of 1 to 7.9 (F/7.9). As a result, you’ll enjoy a sharp image with good contrast. The combination of large aperture and long focal length makes especially Moon, Sun and planets look very impressive through this telescope. But you can also use it to observe many deep sky objects. Look forward, for example, to your first impressions of sparkling open star clusters and globular clusters. But also bright gas nebulae such as the Orion Nebula M42 or the Dumbbell Nebula M27 can already be seen with this telescope. However, how close do the celestial bodies appear through the astronomical telescope? The resolving power of the 114 mm aperture allows for magnifications of up to 230x with sharp images. Technically even more would be possible, theoretically up to 675x using the included accessories. But as the magnification increases, the image sharpness can then slowly decrease. And another factor always determines the answer to the question of possible magnification: the air turbulence in the atmosphere (seeing conditions). Note for nature lovers: If you choose a Newtonian telescope like the Galaxia reflector telescope, you can look forward to a specialist in astronomical observation. However, the image is always displayed laterally reversed as well as upside down, which makes no difference when observing the sky. However, this type of telescope is less suitable for nature and landscape observation during the day. Would you like to use your new telescope for exciting nature discoveries as well? Then we recommend that you choose one of the BRESSER refractor telescopes. Perfect foundation for stargazing newbies – mount and tripod You found the ideal place for your start in astronomy? Then go ahead and mount the beginner's telescope on the equatorial mount and the height-adjustable aluminium tripod. This type of mount has a special advantage over azimuthal models: the movement of the celestial bodies is tracked on just one axis instead of two. To do this, you align one axis parallel to the Earth's axis beforehand. This so-called "alignment" is easily done: you simply point the axis approximately to Polaris. Another advantage of this particular mount is that you move the axes via two flexible shafts with fine adjustment. Perfect for comfortable and sensitive adjustment and tracking of your telescope. Always at hand: The extensive accessories can be stored on the shelf between the tripod legs. Keep track of things automatically: For this telescope’s equatorial EQ-3 mount, the tracking motor with item number 4951400 is available as an optional accessory. This eliminates the need to manually track a celestial object set in the telescope. When this motor is installed at the mount, it automatically tracks the celestial object, keeping it in the field of view of the eyepiece. This makes observing the night sky even more comfortable! Everything you need for your new hobby – the accessories Since the telescope kit comes with an extensive range of accessories, you are perfectly equipped for your first steps in the fascinating world of astronomy. Simply install the LED viewfinder parallel to the tube, adjust it and look through. As you do so, you will see a red dot projected onto a small ground-glass screen inside the viewfinder. It appears to hover in front of the sky at the exact spot where the telescope is pointed. This helps you to find celestial objects and the exact telescope alignment more easily. Simply change your perspective – with the two eyepieces you can marvel at your favourite astronomical objects in different magnifications. They are easily inserted into the telescope's focuser using the sockets, which have the standard diameter of 1.25 inch (31.7 mm). Do you want an even more detailed view? Then simply triple the magnification of the eyepieces using the 3x barlow lens. Astronomical observations are well worthwhile even during the day: enjoy a safe view of sunspots and granulation on our own star with the solar filter. CAUTION: Never point the telescope at the sun without the solar filter! Take your first photos of the Moon or the Sun, and do it easily: the smartphone adapter enables you to attach your smartphone camera to the telescope and soon enjoy your very own astronomical snapshots. FEATURES Reflector telescope with 114 mm aperture and 900 mm focal length Reflector type Newton Well suited for observing Sun, Moon and planets, also star clusters and gas nebulae are visible Height-adjustable tripod with equatorial EQ3 mount Sensitive adjustment through flexible shafts and fine adjustment in both axes Easy to use, very suitable for beginners Focal ratio F/7.9, thus sharp image and good contrast 1,25 inch (31,7 mm) eyepiece focuser Two eyepieces and one barlow lens with 1.25 inch (31.7 mm) extension tubes for different magnifications Safe solar observation with the included solar filter Easy first steps into astrophotography with smartphone camera adapter SCOPE OF DELIVERY Telescope Aluminium tripod Equatorial EQ3 mount Eyepieces: 4 mm and 20 mm (1.25 inch sockets) Barlow lens 3x (1.25 inch socket) LED illuminated dot finder Solar filter Smartphone camera adapter Accessory tray Astronomy software download Instruction manual