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The filter wheel is inserted between the focuser and the camera or eyepiece. It allows a quick change of filter by simply turning the wheel. The EFWmini motorized filter wheel is very thin - the filters are only 10mm away from the sensor, so even with high-intensity telescopes there is no vignetting. If you work with unmounted 31mm filters instead of 1.25" filters, you can even use objectives up to f/2, without any annoying vignetting!Power consumption is very low. You can, for example, easily operate the filter wheel through the camera's USB hub (if available). Delivery also includes a 1.25" holder if you do not wish to use the T-thread. Connector (at camera end) T2Connection (to the telescope) T2Filter slot 1,25"Max. number of filter slots (piece) 5Optical length (mm) 20  

2 independent charging channels Processor-controlled three-stage charging process TC/CC/CV High charging current- 2X 2a/3X 1a Powered by any micro USB Charger (recommended WITH QC 3.0) Compact size-Easy to carry Reactivation function of deeply discharged cells Protection: Short-circuit, thermal, reverse polarity In a small enclosure, a fully professional processor loader with a three-stage charging process TC/CC/CVis concealed. It loads 3.6/3, 7V Li-ion cells with any capacity in sizes 18650, 18700, 20700, 21700, 22650, 25500, 26650.What Is THE TC/CC/CV charging method? It is a three-step process of loading Li-ion cells to keep the cell in good condition by charging the right current at each stage and completing the charging process at the right moment.The various stages of the TC/CC/CV process are:• TC phase: Cells discharged below 2, 9V are ’ awake ’ to lower currents.• CC phase: When 2, 9V is reached, the cell is loaded with a constant current of 2x2A/1x3A.• CV phase: When the cell is already nearly charged, the charger switches to a decreasing current charge until it reaches a voltage of 4, 2V on the cell. After reaching 4, 2V the charging process is complete-the battery is fully charged.Batteries with a voltage of 4, 1V or higher are treated by the charger as charged. To recharge such a full battery, please insert it into the charger before powering it in. When left in the charger, the charged batteries will be subjected to a natural self-discharge process. Charging will resume when the battery voltage drops below 4, 1V.The Xtar SC2 Charger has a function of reactivating deeply discharged cells and cells with a Voltage Of 0v. Many chargers on the market are not able to charge such batteries. Here with the help comes the charger Xtar SC2, which in many cases allows you to ’ resave ’ such cells. Just insert a deeply discharged battery into the SC2 charger, as with normal charging, the charger detects the unloaded link and attempts to reactivate it. Attention! Cells unloaded below a certain level are irreversible and reactivated may not be possible. Avoid too deep discharge of Li-ion batteries-this can lead to a significant reduction in their durability and capacity or to their total malfunction.Chargers from other manufacturers can significantly increase the temperature of the cells being charged during charging. Excessive heating of the cells can cause them to wear more quickly. When designing a SC2 charger, Xtar went one step further from the competition, solving this problem easily: the power from an external power supply was applied. This allows the temperature of the SC2 rechargeable battery to increase by up to 15 degrees.Supplied with Xtar SC2 charger, we get a micro USB cable. The power supply is not Included In the set. Any charger with a micro USB cable, for example, is enough to power the charger. Phone, or USB port or a computer with a free USB socket. The recommended minimum charger power is 2A).  

Bug out with this set of 4 real, 3D insect specimens perfectly preserved in resin. These specimens are ideal for observing and imaging with any Celestron digital microscope. Crystal clear resin lets you observe the insects from all angles. Use them for school projects, research, and more.These specimens make the perfect gift for the young scientist in your life. They'll love learning about fascinating insects from around the world, and studying their anatomy up close. Your little entymologist can even display the insects in his or her room when not in use.This kit includes a real hornet with a stinger, a black camellia shield bug, an iridescent emerald rose chafer, and a large home spider.Celestron offers 3 sets of 3D bugs to choose from: collect them all!

Bug out with this set of 4 real, 3D insect specimens perfectly preserved in resin. These specimens are ideal for observing and imaging with any Celestron digital microscope. Crystal clear resin lets you observe the insects from all angles. Use them for school projects, research, and more.These specimens make the perfect gift for the young scientist in your life. They'll love learning about fascinating insects from around the world, and studying their anatomy up close. Your little entymologist can even display the insects in his or her room when not in use. This kit includes a jewelled frog beetle, a golden cicada with large wings, a small stag beetle, and an ant preserved with a red bean.Celestron offers 3 sets of 3D bugs to choose from: collect them all!

The modern BRESSER LED desk magnifier in timeless plain design is equipped with a 3-fold LED illumination. It can be switched on and off conveniently with a soft press on the lens mounting. The generously sized 70 mm lens made of optical glass provides a big field of view. With a 5-fold magnification this desk magnifier is very versatile for macroscopic applications - such as the control of small prints and technical drawings or of stamps and coins. This handy helper shouldn't be missing on no desk or tinkerer's table! Its qualitative workmanship with a lens mounting and a body of aluminium make the BRESSER LED desk magnifier a real eye catcher.

These eyepieces with their huge apparent field of view not only gave the observer a panoramic visual experience, but they relax the eye so the observer could pay attention to subtle details for extended periods. These ultra-wide angle eyepieces played a critical role in the military for aiming at targets, and their long eye-relief counterparts helped reduce eye injury from recoil. Each 100° Series Argon-Purged Waterproof eyepiece is internally sealed and purged with inert, dry argon gas to prevent internal fogging, to halt the intrusion of fine particulates and fungus. This also maximizes the life of the internal coatings. To make sure, every 100° eyepiece is tested by submerging them down to 1 meter of water for 30 minutes.All 100° Series eyepieces are fully multi-coated and edge-blackened to produce maximum contrast.

Explore Scientific 82° Series™ extreme wide field eyepieces are optimized to produce high contrast, high resolution, and superior flat field characteristics. The visual effect of these eyepieces with their long eye-relief and their 82° apparent field is truly a full-immersion experience. Your eye is relaxed, allowing you to easily use the "averted vision" technique to study faint details across a huge field-of-view. The 82° Series eyepieces come with a twist-up rubber eye-guard that raise to the desired height for the comfort of the observer, and as experienced astronomers know, eye comfort is critical when trying to observe at the visual limits of the telescope. To keep internal reflections to a minimum, all internal surfaces of the eyepiece barrel are flat black, as well as the edges of the lenses themselves to minimize the scattering of light within the lenses themselves. All 82° Series eyepieces are fully multi-coated and edge-blackened to produce maximum contrast.                                                                                                                      

  The National Geographic Chemistry Kit 2000 consists of 64 pieces with which you can make 70 different and exciting experiments.  An illustrated instruction manual tells you to step by step on how to proceed.  Discover: How to make a colored foam column and homemade modeling clay? How to create a lava lamp with a chemical reaction? How to create giant soap bubbles with glycerine? How to make incredible stalagmites and stalactites with crystals? KIT CONTENTS:   Large and small measuring cups, Pasteur pipettes, funnel, balloons, rubber bands, tweezers, petri dish, play dough, straws, disposable lab-coat, protective gloves, protective goggles, sodium bicarbonate, plastic spatulas, test tubes, test tube rack, round filter papers, magnesium sulphate, copper sulphate, iodine tincture, litmus powder, flask for the litmus solution, liquid glycerine, wooden spatulas, potassium alum, wooden stick, pH test strips, yellow, blue and red food colouring, fresnel magnifier and manual with educational information and exciting experiments.