Reviews Newtonian Mirrors

Maksutov-Cassegrain Telescope for Adults Kids Astronomy Beginners, Sarblue Mak60 Catadioptric Compound Telescope 750x60mm, Compact Portable Travel Telescope, with Tabletop Tripod Phone Adapter

  • ...escope and helps you understand how it works. Make it an appealing educational kit for the young minds. But keep in mind not to touch the mirrors with your fingers and avoid making it dusty..
  • 【Compact and Portable】Maksutov-Cassegrain mechanism makes this telescope much more compact than a equivalent refractor or Newtonian. With a long focal length of 750mm, the tube length is only 200mm. Easy to pack and go on a adventure anytime..
  • 【Superior Eyepiece】The included high-quality 20mm eyepiece brings 37.5X magnification, providing high-power sharp views on distant objects. You can see any targets more than 8 meters away. Accessories also include a phone adapter, a tabletop tripod and an erect-image diagonal..
  • 【Satisfaction】This Mak telescope that combines power and simplicity requires no-tool super easy setup. It's a perfect gift for kids or adults astronomy beginners. You will also receive one-year hassel-free warranty and 24-hour friendly customer service..
Check Stock

Bonvoisin Digital Rotary Viscometer 10-2,000,000mPa.S Digital Lab Rotational Viscosity Meter +-3% Accuracy Fluidimeter Tester Meter with 4 Rotors and Temperature Probe 110-240V(NDJ-8S)

  • APPLICATION-The viscometer is used for testing the apparent viscosity of non-Newtonian fluid and the absolute viscosity of the Newtonian fluid. It's compatible for solvent based adhesive, paints, inks (screen printing), oils, milkshake, honey, cosmetics, etc.(sample temperature under 100 Celsius/212 Fahrenheit）.
  • ±3% ACCURACY-The rotary viscometer adopts 16-bit high-performance single chip, stepper motor and torque sensor, ensuring an accurate and reliable results..
  • LCD DISPLAY-Display in rotor and speed, mPas(1mPas = 1cP), temperature..
  • 4 Rotors&8 Speed-It is very convenient for users to choose the rotor and rotor velocity correctly for testing liquid, because of the % function displaying the proportion of the measured value in the total range. (% value should be controlled in 15%-85% and around 50% is most suitable).
  • Sliding Design-The viscometer can slide up and down by adjusting the hand shank to adjust to solution container of different height..
Check Stock

Digital Rotary Viscometer with Temp. Probe 10-6, 000,000 mPa.s Viscosity Meter Tester with Data Communication and Printing Software, ±3% 110V

  • [APPLICTIONS]: This viscometer is mainly used to measure the absolute viscosity of the Newtonian liquids and the apparent viscosity of the Non-Newtonian liquid. Such as inks, paints, coatings, adhesives, greases, juices, dairy products, cosmetics, pharmaceuticals, biological fluids, rubber, mud, pulp, etc..
  • [PARAMETERS]: Measuring range:10-6,000,000Mpa.s, model: NDJ-9S, accuracy: ±3%, rotor type: #1, #2, #3, #4, rotating speed: 0.3,0.6,1.5,3, 6, 12, 30, 60rpm/min, voltage: 110V. For low-viscosity liquid, please equip with #0 rotor..
  • [DIGTAL CONTROL]: This unit adopts backlight LED screen, which will display the data more clearly. Rotor, rotating speed, viscosity and temperature are all displayed on the screen. Micro computer control, easy to operate. Data transfer software is installed..
  • [AUTO SEARCH]: This viscometer is functioned with auto search. You can enter to get the right rotor according to the viscosity of your liquid sample liquid. It will effectively reduce the measuring errors in the experiment..
  • [INGENIOUS DESIGN]: Level bubble&spike screws on the base help you get the right angle. Stainless steel rotor fender bracket will also reduce the measuring error owe to rotor shaking..
Check Stock

CGOLDENWALL NDJ-5S Digital Rotational Viscosity Meter Viscometer Rotary visometer 110-240V 10~100,000mPa.s Accuracy:+-3.0% (Old or New Panel)

  • High Measuring Accuracy: Measurement range: 10mPa.S-100,000mPa.S(1mPa.S=1cp) Measurement error:±3%, with 4 rotors (No. 1, 2, 3, and 4) and 4 speeds (6, 12, 30, 60 rpm), which are composed of 16 combinations. You can determine viscosity as low as 1mPa.s with 0# rotor..
  • Microcomputer Control Technology: Adopts advanced mechanical design, manufacturing technology and microcomputer control technology.
  • LCD Digital Display: Has perfect data acquisition and the LCD monitor display selected blue backlit with high brightness so that it can show the results more clearly. Note: In order to provide a better user experience, we upgraded the product label. The product you received may be the old version or the new version.
  • Reliable and Easy to use: Has a measurement of high sensitivity, so the test results are reliable, and also, the operation is very easy..
  • Application: It can be used to measure the absolute viscosity of the Newtonian liquids and the apparent viscosity of the Non-Newtonian liquid. Also can be widely used in the tests the viscosity of the oil, paint, plastics, paints, detergents, drugs, jewelry and other objects..
Check Stock

Astromania Alignment 1.25

  • Output power: less than 5mw, much safer for your eyes. This sturdy laser unit allows you to swiftly and precisely collimate your Newtonian telescope. Only when the optics have been accurately collimated can the telescope offer you its full performance..
  • Accurate collimation in a few minutes provide a more clearer image. The telescope can be collimated by just one person..
  • This adjustment tool can be used in all 1.25″ focusers. We provide you with precise instructions in German and English, with a step-by-step explanation of how to adjust a Newtonian telescope using this laser unit. So, even if you are a newcomer to amateur astronomy, it is very simple to get the optimum performance out of your telescope..
  • The precision-made aluminium housing of the laser unit has a front opening from which the laser beam can be emitted. In order to obtain an optimal adjustment, it has a side window allowing a disk oriented at 45° with a central hole to be viewed.This can be then later be used to see whether the laser is reflected back on itself, indicating well collimated optics..
  • The laser comes fully adjusted. It can however be further adjusted if required. It has three openings for adjustment, arranged at 120°, which are initially sealed. The battery for the ....
Check Stock

Celestron - AstroMaster 114EQ Newtonian Telescope - Reflector Telescope for Beginners - Fully-Coated Glass Optics - Adjustable-Height Tripod - Bonus Astronomy Software Package

  • POWERFUL REFLECTOR TELESCOPE: The Celestron AstroMaster 114EQ Newtonian telescope is a powerful and user-friendly reflector telescope. It features fully-coated glass optics, a full-height tripod, 2 eyepieces, and a StarPointer red dot finderscope..
  • NEWTONIAN REFLECTOR OPTICAL DESIGN: With a 114mm aperture, the AstroMaster 114EQ can gather enough light to see our Solar System and beyond. View Saturn’s rings, Jupiter’s Galilean moons, the Moon's craters, and more..
  • EASY TO SET UP AND USE: This is a great telescope for kids and adults to use together. It features a manual German Equatorial mount for smooth and accurate pointing. Setup is quick and easy, with no tools required..
  • INCLUDED ACCESSORIES: We’ve included 2 eyepieces (20mm and 10mm), a full-height tripod, and a StarPointer red dot finderscope. You'll also receive a FREE download of one of the top-rated astronomy software programs..
  • UNBEATABLE WARRANTY & SUPPORT: Buy with confidence from Celestron, a leading telescope brand in California since 1960. Your purchase includes a 2-Year US Warranty and unlimited support from our team of US-based experts..
Check Stock

Zahn Cup Immersion Viscosity Cup, Dip Type Stainless Steel Viscometers for Test The Viscosity of Newtonian or Approximate Newtonian Liquid (NO.2)

  • 【Precise & Credible】 The Stainless Steel Cup is made by precise mold, and the orifice is drilled using precise high-speed CNC. It's calibrated against National Institute of Standards and Technology (NIST). Therefore, you will get accurate and believable measurements with this Zahn Cup..
  • 【Durable Viscosity Cup】Our dip viscosity cups are made of premium 304 stainless steel, corrosion-resistant and solvent-resistant, thickened cup and bottom, polished surface and smooth inside, easy to clean..
  • 【Easy to Use】Stainless steel body with 12 inches loop handle for hand-dipping into liquid container, finger-ring is easy to maintain the cup in a vertical position during use. Clear nameplate number is convenient to distinguish various models at a glance..
  • 【Light & Portable】The nominal capacity of the cup is 44 ml, only 79grams, very light and portable, it’s easy to carry to laboratory, factory, workshop or field etc. You could quickly check and adjust the viscosity of liquids in anywhere..
  • 【Wide Application】 Magsoar Zahn cup is widely used in the paint industry, ideal for measure the viscosity of Newtonian or near-Newtonian liquids, such as paint, ink, dye, lacquers, varnishes, syrup and oil..
Check Stock

Celestron - AstroMaster 130EQ Newtonian Telescope - Reflector Telescope for Beginners - Fully-Coated Glass Optics - Adjustable-Height Tripod - Bonus Astronomy Software Package

  • POWERFUL TELESCOPE FOR ASTRONOMY BEGINNERS: The Celestron AstroMaster 130EQ Newtonian reflector is ideal the telescope for beginners. It features fully-coated glass optics, a full-height tripod, 2 eyepieces, and a StarPointer red dot finderscope..
  • NEWTONIAN REFLECTOR OPTICAL DESIGN: With a large, 130mm aperture, the AstroMaster 130EQ can gather enough light to see our Solar System and beyond. View Saturn’s rings, Jupiter’s Galilean moons, the Moon's craters, and more..
  • EASY TO SET UP AND USE: This is a great telescope for kids and adults to use together. It features a manual German Equatorial mount for smooth and accurate pointing. Setup is quick and easy, with no tools required..
  • INCLUDED ACCESSORIES: We’ve included 2 eyepieces (20mm and 10mm), a full-height tripod, and a StarPointer red dot finderscope. You'll also receive a FREE download of one of the top-rated astronomy software programs..
  • UNBEATABLE WARRANTY & SUPPORT: Buy with confidence from Celestron, a leading telescope brand in California since 1960. Purchasing from an Authorized Dealer on Amazon gives you a 2-Year US Warranty and unlimited support from our team of US-based experts..
Check Stock

Alstar Alignment 1.25' Next Generation Laser Collimator for Newtonian Telescopes

  • ...aled. The battery for the laser can be exchanged at any time.
  • the small screw cap at the rear of the laser must be first unscrewed to allow this..
  • This adjustment tool can be used in all 1.25" focusers. We provide you with precise instructions in German and English, with a step-by-step explanation of how to adjust a Newtonian telescope using this laser unit. So, even if you are a newcomer to amateur astronomy, it is very simple to get the optimum performance out of your telescope..
  • The precision-made aluminium housing of the laser unit has a front opening from which the laser beam can be emitted. In order to obtain an optimal adjustment, it has a side window allowing a disk oriented at 45° with a central hole to be viewed.This can be then later be used to see whether the laser is reflected back on itself, indicating well collimated optics..
  • Built with metal material. CR2032 Lithium Cell battery (Not include).
  • Accurate collimation in a few minutes provide a more clearer image. The telescope can be collimated by just one person..
  • Designed for Reflector telescope, with removable 2" adapter both fit for standard 1.25 inch diameter and 2 inch diameter. Red laser collimation beam with 7 brightness levels, wavelength 635-655 nm.
Check Stock

Astromania Alignment 1.25' Next Generation Laser Collimator 2' Adaptor for Newtonian Telescopes

  • ...or Reflector telescope, with removable 2" adapter both fit for standard 1.25 inch diameter and 2 inch diameter. Red laser collimation beam with 7 brightness levels, wavelength 635-655 nm.
  • Output power: less than 5mw, much safer for your eyes. This sturdy laser unit allows you to swiftly and precisely collimate your Newtonian telescope. Only when the optics have been accurately collimated can the telescope offer you its full performance..
  • Built with metal material. CR2032 Lithium Cell battery (Not include).
  • Accurate collimation in a few minutes provide a more clearer image. The telescope can be collimated by just one person..
  • The precision-made aluminium housing of the laser unit has a front opening from which the laser beam can be emitted. In order to obtain an optimal adjustment, it has a side window allowing a disk oriented at 45° with a central hole to be viewed.This can be then later be used to see whether the laser is reflected back on itself, indicating well collimated optics..
  • This adjustment tool can be used in all 1.25" focusers. We provide you with precise instructions in German and English, with a step-by-step explanation of how to adjust a Newtonian telescope using this laser unit. So, even if you are a newcomer to amateur astronomy, it is....
Check Stock