Levenhuk Overview: Rainbow and LabZZ M101 Microscopes series for children and beginners
Levenhuk Rainbow 50L – bright, stylish microscopes perfect for beginning microcosm explorers, as well as experienced biologists. These microscopes allow you to examine plant and animal tissues and learn more about their cellular structure, observe living microorganisms in a water drop, and do many other interesting things!
Each model comes with a Levenhuk K50 Experiment kit. Experienced users will appreciate the highest quality of optics and produced views. Thanks to the combined illumination system, these microscopes are suitable for viewing transparent, opaque, and semi-transparent samples. Levenhuk Rainbow 50L microscopes have lightweight, yet reliable plastic bodies.
Compared to other series, Levenhuk Rainbow 50L microscopes offer a wider range of magnifications – there are six levels of increase: 40x, 80x, 100x, 200x, 400x, and 800x. Moreover, these microscopes come in reliable plastic cases for their safe storage and transportation.
The series includes 5 stylish colorful designs – you can easily choose the one that best suits your taste!
Optics Three objectives included in the kit provide 40x-400x magnification range. To set desired magnification, simply rotate the revolving nosepiece. To make the magnification range even wider, the kit includes a 2x Barlow lens, which doubles the magnification provided with any given objective. This gives us a great choice of available magnifications: 40x, 80x, 100x, 200x, 400x and 800x!
Quality glass optics produce clear images without distortions. To improve optics light transmission, the lenses are covered with multilayer coating.
Double illumination All microscopes in the Levenhuk Rainbow 50L series are equipped with two LED illumination systems. The lower illumination allows for observations in transmitted light; for example, you can observe microorganisms in a drop of aquarium water or study the cellular structure of an onion peel. The upper illumination makes it possible to work with opaque objects – among other interesting things, you can see the inner structure of different kinds of paper and fabrics. In order to observe semi-transparent samples, both illuminations need to be turned on. A smooth brightness adjustment mechanism makes it easy to set the best level of illumination required for each particular sample.
Thanks to its double illumination system, the microscope is suitable for working with a wide range of diverse samples. Lower illumination is used for observing transparent samples such as thin slices of plants, pet fur, and salt and sugar crystals. Upper illumination is required for working with opaque samples, for example, fabrics or paper. If you need to observe a semi-transparent sample, turn on both illuminations. The convenient brightness adjustment mechanism allows you to easily set just the right level of illumination.
User-friendly design The microscope comes in a durable and lightweight plastic body. To provide you with the most comfortable observations, the microscope head is inclined at 45° and can be rotated 360° around its axis. That is extremely convenient when working in a group – you don’t have to move the instrument; just turn the head in the desired direction. The microscope can be powered by either an electrical outlet or batteries.
The body is made of sturdy plastic, so the microscope is both durable and lightweight. To prevent fatigue during long studies, the head is inclined at 45°. During group observations the head can be easily rotated 360° around its axis. The microscope can be used both indoors and outdoors as it can be powered by an outlet as well as by batteries.
Levenhuk K50 Experiment Kit The microscope comes with Levenhuk K50 Experiment Kit that includes everything a beginning biologist might need. With this kit, a young explorer can start his or her observations right away – ready-to-use microscope slides are supplied with the kit. It’s also possible to create new microscope slides with provided instruments, observe Artemia and carry out a number of interesting experiments. The user guide included in the kit will help with all of this in a fun, entertaining manner.
Case The microscope comes with a sturdy plastic case that securely protects the microscope from dust and impact. The case is very convenient to take along to school or for a walk.
The kit includes: Microscope Objectives: 4x, 10x and 40xs Eyepiece: WF10x 2x Barlow lens Stage with clips Diaphragm disk Condenser Built-in upper and lower LED illuminations AC adapter 2 AA batteries Plastic case Levenhuk K50 Experiment Kit User manual
Levenhuk K50 Experiment Kit includes: "Attractive Microscope. Scrutinizing the Microcosm" User Guide Forceps Hatchery for Artemia (brine shrimp, or sea-monkeys) Microtome Flask with yeast Flask with pitch Flask with sea salt Flask with brine shrimp 5 ready-to-use specimens 5 blank slides Dropper Dust cover
Specifications: Head: monocular, rotatable 360°, inclined 45° Optics material: optical glass Magnification, x: 40–800 Eyepieces: WF10x Objectives: 4х, 10х, 40хs (spring) Revolving nosepiece: 3 objectives Stage, mm: 90x90, with clips Stage moving range, using focusing mechanism, mm: 0–11, vertical Condenser: NA 0.65 Diaphragm: diaphragm disk (6 apertures) Focus: coarse Body material: plastic Illumination: LED (3-3.2V) Brightness adjustment: yes Power supply: 220 V/50 Hz or 2 AA batteries Shipping weight: 6.1 lb (2.78 kg) Package size (LxWxH): 7.1×15.9×10.6 in (18×40.5×27 cm)
Looking for something to start your observations with?
Paramecium caudatum is perhaps one of the first protozoans that a young naturalist would explore. These organisms live in fresh standing water. They can also be found in an aquarium, especially if it hasn’t been cleaned for a long time. My ciliate-shoes were taken from the aquarium. Of course, there are only a few ciliate-shoes in aquarium water – the possibility of finding one of them in your microscope’s eyepiece is extremely low. Therefore, we need to increase their concentration. To do so, take a jar (about 17 fluid ounces or 0.5 liters), fill it with aquarium water, put a small spoiled onion and banana peel inside. Put the jar in a warm dark place for 5 to 7 days (don’t close it with a lid).
The average size of Paramecium caudatum is 0.02 inches (0.5 mm). For locomotion Paramecium caudatum uses its cilia (about 15 thousand cilia cover its little body!). Moreover, it has two nuclei (a large macronucleus is responsible for nutrition, respiration, metabolism, etc.; and a small micronucleus – for reproduction). Paramecium caudatum feeds on bacteria or algae. The food is caught by an oral groove covered in cilia and then goes to the cell mouth. It is then digested in the digestive vacuole (gullet). Undigested leftovers are ‘thrown out in the open’ through an anal pore (cytoproct). To remove all excess water, our heroine has two contractile vacuoles. They work like pumps on a boat, pumping excess water out of its body. Paramecium caudatum maintains its slipper-like shape thanks to a special membrane (pellicle).
Study this image to learn all parts of Paramecium.
กล้องดูดาว Sharpstar 94mm 94EDPH f/5.5 ED Triplet Apo Refractor Telescope สีแดง
Sharpstar has been making refractors for many years for well-known worldwide astronomy vendors, and they’re now marketing their own premium apochromatic refractors at a surprisingly affordable price. The Sharpstar 94EDPH is the third in their series of instruments under the Sharpstar brand that’s quickly gaining a reputation for precision instruments for visual observation and astrophotography.
The 0.84x reducer can bring Sharpstar 50EDPH's focal ratio down to F4.6. This is a standard reducer with field flattening capabilities as well. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters, and faint, fast-moving celestial objects.
The 0.84x reducer adopts a quadruplet design and supports an APS-C frame. The overall weight is 0.24kg. The back focus from the M48 thread is a standard 55mm. The front thread is M42*1 and the camera end thread is M48*0.75. At the same time, it has a built-in 2-inch filter thread, which can be directly installed and used. The overall CNC machined, both end threaded metal caps prevent ash when not in use.
เมาท์และขาตั้ง Sky-Watcher AZ-EQ Avant mount with SA tripod (Extended version)
The well-engineered and easy to use AZ-EQ Avant mounting provides excellent stability and precise control in either alt-azimuth or equatorial configurations, via its smooth slow motion controls located on both axes. The slow motion control knobs can be conveniently positioned at either end of both the R.A. or DEC axis shafts.