กล้องจุลทรรศน์ Levenhuk 2S NG Microscope 25648

• กล้องจุลทรรศน์แบบตาเดียว กำลังขยาย 200x
• วัสดุทำด้วยโลหะ แข็งแรงทนทาน และมีน้ำหนักเพื่อความเสถียรภาพในระหว่างใช้งาน
• เหมาะกับการส่องตัวอย่างที่มีความโปร่งแสง
• ช่องส่องออกแบบเอียงเข้าหาผู้ใช้ เพื่อความสะดวกในการส่อง
• แหล่งแสงส่องจากกระจกแบบ plano concave ขนาด 1.6" ใต้วัตถุ จึงนำออกไปใช้นอกสถานที่ได้ ปลอดภัยสำหรับเด็ก
• มีเลนส์วัตถุแบบ achromat ที่ 16x และเลนส์ตาที่ 12.5x ให้อัตราขยายที่ 200x
• แบรนคุณภาพจาก USA ; ประกัน 2 ปี

Levenhuk 2S NG Microscope
Monocular. Magnification: 200x. Illumination: mirror.

Levenhuk 2S NG Microscope is an attractively priced basic microscope for beginners, children and students. The microscope works in bright field mode allowing you to observe transparent specimens, and has a very good price/quality ratio. Featuring 200x magnification Levenhuk 2S NG Microscope will show amateur observers everything they need to start their scientific investigations.

1.6-inch plano-concave mirror used as the illumination source in the Levenhuk 2S NG Microscope provides the light required for observations and has several advantages that make it safe for children to use. Plano-concave mirror is known as the safest illumination method; it doesn't require a separate power supply and can be easily controlled by adjusting the disc diaphragm.

Levenhuk 2S NG Microscope has a 16x eyepiece that provides quality views without aberrations, and coarse focusing system with 0.8-inch focusing intervals that makes the images sharper.

This model features inclined head and stage, so you can comfortably adjust the microscope to your desired position during observations. The stage also has stage clips to keep samples (one or two since stage dimensions allow that) in place. Reliable metal construction ensures the microscope's stability.

Levenhuk 2S NG Microscope kit includes:
- Microscope
- 1 objective: 16 x
- 1 eyepiece: H12.5 x
- Condenser
- Stage with clips
- Plano-concave mirror
- User manual and lifetime warranty

Specifications:
Magnification, x: 200
Head: monocular
Eyepiece: H12.5x
Objective lens: 16x achromat
Body type: straight body tube
Stage dimensions, in: 3.9x3.5, with stage clips
Condenser: disk diaphragm
Focus: coarse, 0.8 in
Illumination: 1.6-in plano-concave mirror
Weight: 2.8 lb (1.25 kg)
Package size (LxWxH): 5.5×7.7×12.8 in (14×19.5×32.5 cm)

User Manual: User manual: Levenhuk 2S/3S Biological Microscope 

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).

 

Paramecium caudatum. Animation. Magnification: 64x.

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.

Source: https://www.levenhuk.com/reviews/paramecium/

 

Some things you can see under a microscope:

 

 

 

 

 

More information

You can find a review on this microscope here.
Find answers to frequently asked questions about microscopes here.
Step-by-step guide on how to work with prepared microscope slides.
How does an aperture of a microscope objective lens work? Learn here.
Find a useful review on what a microscope consists of here.
Find reviews on what hair and insects' eyes look like under a microscope here and here.
Find out how to make your own microscope slides here and here.