National Optical 131 Student Compound Microscope with Tungsten Illumination Review

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National Optical 131 Student Compound Microscope with Tungsten Illumination

The National Optical 131 Basic Monocular Compound Microscope has a 10x widefield eyepiece with pointer, a forward-facing nosepiece with three DIN achromatic objectives that are parcentered and parfocal, tungsten illumination, separate coarse and fine focus, a disc diaphragm, and a plain stage with stage clips. The monocular viewing head has a fixed inclination to reduce eye and neck strain, and 360-degree rotation capability to enable sharing. An eyepiece pointer is used to identify features for students. A forward-facing nosepiece eases changing objectives. Rotation positions with secure, positive stops ensure accurate positioning and support a range of magnification options. Achromatic objectives provide color correction of magnified images. Parcentered and parfocal objectives ensure that the image stays centered and focused when the magnification is changed. The 40xR objective is retractable and spring-loaded to prevent damage to the slide or objective when focusing. A basic compound microscope is used in classroom, home school, and hobbyist settings for inspection and dissection of specimens when two-dimensional images are desired.

The microscope has lower (diascopic) Brightfield illumination that transmits light up through the specimen for enhanced visibility of translucent and transparent objects. Brightfield (BF) illumination allows the specimen to absorb light, resulting in a dark image on a light background. The tungsten (incandescent) light source provides bright light. A disc diaphragm controls the amount of light illuminating the specimen. The plain stage has an opening for light transmission, stage clips to secure the slide or specimen in place while viewing, and pre-drilled holes that accept a mechanical stage (sold separately). Separate coarse and fine focus knobs speed focusing. A slip clutch prevents excess pressure from damaging the slides or objectives, a stage stop prevents the stage or specimen from coming into contact with the objectives, and a focus tension control prevents stage drift. The cast metal frame provides durability and has a gray enamel finish.

Microscope Head and Optics Specifications
Head Monocular
Magnification range 40x-400x
Head inclination 45 degrees
Eyepiece (18mm) WF10x
Nosepiece Forward-facing
Objectives, DIN achromatic, parcentered, parfocal 4x, 10x, 40xR (retractable)

Microscope Illumination and Stage Specifications
Focus type Separate coarse and fine
Condenser 0.65 NA
Light source Tungsten, 20W
Diaphragm Disc, five-hole
Illumination type Brightfield
Stage type Plain
Stage dimensions 110 x 120mm (W x D)
Power 110V

W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.

Microscopes are instruments used to enhance the resolution of an object or image. Types include compound, stereo, or digital. Compound microscopes use a compound optical system with an objective lens and an eyepiece. Stereo microscopes show object depth in a three-dimensional image. Digital microscopes are used to display an image on a monitor, rather than looking through a lens. Microscopes can have monocular (one), binocular (two), or trinocular (three) eyepieces, with varying magnification abilities. Magnification ability refers to the size of an image. Resolution, also known as resolvant power, refers to the clarity of the image. The interaction between field of view (FOV), numerical aperture (NA), and working distance (WD) determines resolution. Microscopes can control magnification through a fixed focus, or through a range of adjustments. They can also utilize LED, fluorescent, and mirror light sources to help control viewing capabilities. Microscopes are widely used in education, lab research, biology, metallurgy, engineering, chemistry, manufacturing, and in the medical, forensic science, and veterinary industries.

National Optical and Scientific Instruments manufactures microscopes and microscope cameras. The company, founded in 1991, is headquartered in Schertz, TX.

What’s in the Box?

  • National Optical 131 Basic Monocular Compound Microscope
  • WF10x eyepiece, 18mm
  • 4x DIN achromatic objective
  • 10x DIN achromatic objective
  • 40xR (retractable) DIN achromatic objective
  • Dust cover
  • Instructions

Eschenbach Sektor D 8×56 Waterproof Binoculars for Hunting for Adults Review

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Eschenbach Sektor D 8x56 Waterproof Binoculars for Hunting for Adults

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  • EXCEPTIONALLY LIGHT & ROBUST: While hunting binoculars are usually heavy, our sektor is lightweight thanks to the magnesium body with anti-slip rubber coating
  • HIGH POWER 8X56 SUPERZOOM binoculars: powerful, bright and foldable binoculars for safari, hunting and every outdoor activity. Perfect for bird watching or animal observation
  • WATER PROOF & FOGPROOF: the sektor are nitrogen filled and the case is absolutely watertight, thus suitable for any kind of weather. Bring it with you when hiking!
  • BAK-4 PRISMS: these specially selected and carefully machined high-performance prisms manufactured from barium crown glass provide even better resolution of details and a brighter image with high color fidelity
  • DEVELOPED IN GERMANY: ESCHENBACH’s story started over 100 years ago with an idea: precision. This is a guiding principle that we follow as a developer of quality optical products. We follow traditional values like experience, skill and vision

Size:8×56

One of the lightest hunter‘s binoculars on the market

The sektor are the ideal binoculars for eagle watching or deer observation.

They combine true to-life images, durability and incredible lightness.

Their handy and functionnal design makes focusing child’s play and allows prolonged observation.

Well equipped with waterproof housing and nitrogen filling, the sektor binoculars can be used with sun glasses or in rainy weather.

These powerful inoculars are extremely robust and shock resistant.

The carrying strap, high quality case and dust protection caps offer even more value to this great pair of compact binoculars.

Technical features

  • Magnification: 8x
  • Lens Ø (mm): 56
  • Exit pupil (mm): 7,0
  • Geometric light intensity: 49,0
  • Twilight factor: 21,2
  • Eye relief min./max. (mm): 7/18
  • Pupillary distance min./max. (mm): 65/74
  • Near point (m): 1,8
  • Field of view m / 1,000 m: 114
  • Height x Width x Depth (mm): 176 x 141 x 65
  • Weight without bag (g): 1038
  • Nitrogen filled: Yes
  • Waterproof: Yes
  • Eyepieces for spectacle wearers: Yes
  • Prisms: Bak-4, phase-corrected
  • Coating: Full multi-coating
  • Warranty: 5 years

What’s in the box

Sektor 8×56 binoculars; Carrying strap with quick-release fastener; High quality case; Practical dust protection caps

Celestron 71376 12×50 Granite Binocular (Black) Review

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Celestron 71376 12x50 Granite Binocular (Black)

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  • Fully Multi-Coated for enhanced light transmission
  • BaK-4 Prisms with High Reflectivity and Vivid Colors
  • Binocular Harness Strap – comfortable and keeps the binoculars handy
  • Metal construction in the Focus Knob, Diopter Ring, and Twist-Up Eyecups for long life and precision movement
  • Waterproof and Fogproof – nitrogen purged to prevent internal fogging in all weather conditions
  • Eco-Friendly – lead and arsenic free

Style:12 x 50  |  Configuration:Binocular

BEDROCK OF THE SERIOUS OBSERVER’S TOOLKIT – Celestron Granite ED Series Roof Prism Binoculars represent the core values of rock solid binocular design, ultra-high performance glass and reliable construction at an affordable price. The ED lenses ensure that each wavelength of light is kept in balance with all the others to provide an image which is true-to-life. They are also useful in lowlight situations helping you to pick out details in subjects in dense brush even at dawn and dusk. They stand up well against the much more expensive European and higher end Japanese manufactured binoculars at a fraction of their cost – a real value! EXTRA LOW DISPERSION GLASS – Granite Binoculars feature ED (Extra-Low Dispersion) glass, delivering edge-to-edge sharpness with excellent color correction and razor sharp images while virtually eliminating chromatic aberration. Coupled with fully broadband multi-coatings the optical design delivers crisp, high contrast images with accurate color reproduction for unrivaled image quality superior to standard optical glass. FULLY MULTI-COATED OPTICS AND BAK-4 PRISMS – The Phase Coated Prisms correct out-of-phase shifts of light rays to ensure maximum contrast while providing superb natural color fidelity and vivid color saturation. High grade BaK-4 prism glass renders sharp images and the reflectivity coatings increases the throughput transmission to provide bright images that are rich in detail. LIGHTWEIGHT, WATERPROOF CONSTRUCTION – State-of-the-art modern open frame style provides an excellent grip and is comfortable to handle (even single handed) with the reduced weight. The body is made of magnesium alloy which is lighter than aluminum, and more rugged and tough for handling in any environment. They are a mid-sized binocular, perfect for travel because of their weight and small form factor yet are packed with features that match up well optically, mechanically and ergonomically with binoculars costing two to five times as much. Metal Twist Up Eyecups: More durable and a longer life than plastic eyecups. Less susceptible to breaking. Twist-up eyecup for correct positioning of the users eyes for comfortable viewing with or without eyeglasses. Waterproof construction provides peace of mind when unexpected weather rolls in. The housing is also filled with dry nitrogen gas to prevent the internal lenses from fogging when moving between extreme temperatures or when using the binocular in damp conditions. PERFECT FOR: Bird Watching, Hunting, Wildlife and Nature Viewing, Travel and Outdoors, Sporting Events, Astronomical Viewing, Low Light; Extended Use; Changing Weather Conditions

AmScope FR-BL Bausch & Lomb B&L Stereo Microscope E-Arm Review

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AmScope FR-BL Bausch & Lomb B&L Stereo Microscope E-Arm

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  • This is an E-arm with coarse focus for Bausch & Lomb stereo microscopes.

This is an E-arm with coarse focus for Bausch & Lomb stereo microscopes. It is brand new in factory sealed box. This stand is brand new in factory sealed box. Features & Specifications: Brand new E-arm for Bausch & Lomb stereo microscope Coarse focus</FONT> Weight: 2 lbs</FONT> Manufactured under ISO 9001 Quality Control Standard Excellent Five (5) Year Factory Warranty Unbeatable Low Price Guaranteed or the Difference Back! Satisfaction Guaranteed or Your Money Back!

Nikon 7577 Monarch 5 10 x 42 Waterproof/Fogproof Roof Prism Binoculars Lens Pen & Essential Accessory Bundle Review

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Nikon 7577 Monarch 5 10 x 42 Waterproof/Fogproof Roof Prism Binoculars Lens Pen & Essential Accessory Bundle

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  • The Nikon 7577 Monarch 5 10 x 42 are now built with Nikon’s premium ED (Extra-Low Dispersion) Glass for a sharper, clearer and more brilliant field of view.
  • FEATURES: Equipped wIth user-friendly features such as Turn-and-Slide Rubber Eyecups, a Smooth Central Focus Knob and Flip Down Lens Caps.
  • DURABLE: The MONARCH 5 is waterproof, fog proof and has a rubber armored body for strengthened durability.
  • ECO-GLASS: Fully Multicoated Eco-Glass Lenses provide a high light transmittance across the entire visible light spectrum.
  • BUNDLE INCLUDES: Nikon 7577 Monarch 5 10 x 42 Binocular (Black), Binocular Harness , 5 Piece Digital Camera Accessory Kit, Nikon Lenspen Cleaning System, Focus Micro-fiber Cleaning Cloth

Size:10×42

Almost an ounce lighter than its predecessor and built with Nikon ED (extra-low dispersion) glass lenses, the new MONARCH 5 is a serious contender to be the “go-to” binocular for any outdoor enthusiast. The MONARCH 5 delivers sharp, high-contrast views that are the result of a state-of-the-art optical system. Featuring Nikon’s premium ED Glass lenses and Dielectric High-Reflective Multilayer Prism Coatings, the MONARCH 5 displays exceptionally accurate color reproduction and a clear, natural looking image. Each of its Eco-Glass lenses are Fully Multicoated to provide maximum resolution and light transmission. The MONARCH 5 binocular comes in black finish and is available in 8×42, 10×42 and 12×42 magnifications. It utilizes Nikon’s high-eye point design to provide a clear field-of-view and long eye-relief. The long eye-relief ensures a sufficient space between the user’s face and the binoculars’ eyecups to make them comfortable for everyone, even for those wearing eyeglasses. The turn-and-slide rubber eyecups make it easy to find the right eye positioning for extended periods of use. The MONARCH 5 also utilizes a smooth central focus knob that makes it easy to bring object into focus for fast viewing. Built for extreme usage, the MONARCH 5 is Nitrogen filled and O-ring sealed, making it completely waterproof and fog proof. A protective, rubber-armored coating strengthens its durability and ensures a non-slip grip during wet and dry conditions.

Bundle includes:

  • Nikon 7577 Monarch 5 10 x 42 Binocular (Black)
  • Binocular Harness
  • 5 Piece Digital Camera Accessory Kit
  • Nikon Lenspen Cleaning System
  • Focus Micro-fiber Cleaning Cloth

Celestron 71333 Nature DX 10×42 Binocular (Green) Review

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Celestron 71333 Nature DX 10x42 Binocular (Green)

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  • BaK-4 Prisms w/ Phase Coating: Increases contrast and resolution for sharper more detailed images
  • Fully Multi-Coated Optics: Allows maximum light transmission through the optical path for brighter images
  • 6.5’ Close Focus: Detailed, up close observation of subjects in close proximity. Ideal for watching birds, insects, plants, etc
  • Compact and Lightweight. Sturdy, twist-up eyecups with multiple stops. Eyeglass friendly with 17.5 mm of eye relief
  • Wide Field of View

Style Name:10×42  |  Configuration:Binocular

Celestron’s new Nature DX Series is the perfect companion for the outdoors lover. These affordable yet feature-packed binoculars are designed specifically for beginning to intermediate users. With the Nature DX series, you’ll get the important features you’re looking for, like fully multi-coated optics and BaK-4 prisms, while staying within your budget. You can feel confident taking Nature DX binoculars on any of your outdoor adventures. Even the full size models in the series are extremely portable and lightweight. Nature DX can withstand harsh weather; its fully waterproof housing is purged of air and filled with dry nitrogen gas.

Orion 09007 SpaceProbe 130ST Equatorial Reflector Telescope (Black) Review

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Orion 09007 SpaceProbe 130ST Equatorial Reflector Telescope (Black)

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  • This 5.1 inch aperture reflector telescope gathers an ample amount of light for great views of the planets and Moon, as well as brighter galaxies, nebulas, and star clusters
  • Short 24 inch long optical tube design for easy portability and fast f/5 focal ratio for pleasing wide-field performance makes the SpaceProbe 130ST EQ a very versatile telescope the whole family can enjoy
  • Sturdy EQ-2 equatorial telescope mount and adjustable tripod allows manual slow-motion tracking of celestial objects as they appear to migrate across the night sky
  • Complete assembled telescope weighs just 27 lbs. for convenient transport
  • Includes two 1.25 inch Sirius Plossl eyepieces (25mm and 10mm), 6×30 finder scope, 1.25inch rack and pinion focuser, tripod accessory tray, collimation cap, Starry Night astronomy software, and more!

Product Packaging:Standard Packaging

Our largest aperture SpaceProbe reflector telescope is the niftiest Newtonian reflector on an equatorial mount we’ve seen in a long time. The Orion SpaceProbe 130ST EQ Reflector Telescope is a step up from the standard SpaceProbe 130 EQ for the more serious beginning or intermediate stargazer who wants additional performance, particularly for targeting deep-sky objects. Just what’s so nifty about the Orion SpaceProbe 130ST Equatorial Reflector Telescope? The answer is best described as short and sweet. First, the short. This ST, or Short Tube, version of the SpaceProbe 130 reflector is indeed more compact than the standard model. The 130ST reflector telescope’s optical tube measures 24 inches long compared to 33 inches on the standard 130. The focal length of the ST’s 130mm (5.1inch) primary mirror is 650mm (f/5), yielding a wider field of view and brighter images for a given telescope eyepiece focal length. That brings us to sweet. The 130mm aperture primary is a diffraction-limited parabolic mirror, the same type used on much larger reflector telescopes costing many times as much. On a short-focal-length design like this one, a parabolic mirror is a must for focusing incoming light to a point and delivering sharp, detailed images. Moreover, the secondary mirror is held in an advanced holder with thin 0.5mm metal vanes, to reduce diffraction spikes and light loss. These features combined with the included 25mm (26x power) and 10mm (65x power) Sirius Plossl telescope eyepieces and quick-release 6×30 achromatic finder scope make this one sweet optical system for astronomy! The SpaceProbe 130ST EQ reflector telescope also includes a collimation cap and center-marked primary mirror for easy optical alignment. The Orion SpaceProbe 130ST telescope comes on a sturdy and precise EQ-2 equatorial mount with dual setting circles and slow-motion hand controls.

Celestron NexStar Evolution 6, Schmidt-Cassegrain Telescope with Integrated WiFi – with Deluxe Accessory Kit (5 Plossl Eyepieces, 1.25in Barlow Lens, 1.25in Filter Set, Accessory Carry Case Review

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Celestron NexStar Evolution 6, Schmidt-Cassegrain Telescope with Integrated WiFi - with Deluxe Accessory Kit (5 Plossl Eyepieces, 1.25in Barlow Lens, 1.25in Filter Set, Accessory Carry Case

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  • Optical Tube Assembly – 1.25 Star Diagonal – 40mm Plossl Eyepiece – 13mm Plossl Eyepiece – StarPointer Red Dot Finderscope – Fork Mount – Tripod – Accessory Tray – AC Adapter with USA/ EU & UK and AU plugs – 2 Year Warranty – Deluxe Accessory Kit:- 5 x Plossl Eyepieces: 6 & 8 & 13 & 17 & 32 mm – Barlow Lens 2x – Moon Filter – 6 x Wratten Filters: 12 & 21 & 25 & 56 & 58A & 80A – Aluminum Accessory Carry Case
  • Control your telescope wirelessly from your iOS or Android smartphone or tablet with the free Celestron mobile app with planetarium interface and SkyAlign technology
  • Compact, portable 6-inch Schmidt-Cassegrain optical tube with StarBright XLT optical coatings and Fastar compatibility
  • Computerized GoTo mount with high-performance worm gears and motors for improvedtracking accuracy, along with reduced gear backlash
  • Rechargeable lithium-ion battery with enough power for 10 hours of continuous observing

Celestron’s signature telescopes reach a new level with NeXStar Evolution 6, the first Schmidt-Cassegrain telescope with integrated WiFi. Leave your hand control behind and slew to all the best celestial objects with a tap of your smartphone or tablet. Connect your device to NeXStar Evolution’s built-in wireless network, and explore the universe with the Celestron mobile app for iOS and Android. Use the planetarium interface to view the night sky in real time or display a list of celestial objects currently visible based on your time and location. Our proprietary SkyAlign alignment procedure is built right into the Celestron mobile app, so you’re ready to observe within minutes. THE MOST USER-FRIENDLY TELESCOPE EVER Celestron engineers designed NeXStar Evolution based on years of customer feedback. It offers many thoughtful design features that combine to provide you the best possible experience out under the stars. Forget about batteries or an external power supply. For the first time ever on a consumer telescope, NeXStar Evolution includes its own built-in lithium-ion battery. You’ll be able to enjoy stargazing marathons up to 10 hours on a single charge. You can even use NeXStar Evolution’s USB charge port to top off the other devices in your life that need to stay powered on during an observing session. Setting up your NeXStar Evolution is quick and painless with large, ergonomic handles. The steel tripod features leg etchin

Nikon 7392 7×15 Anniversary Edition Binocular Review

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Nikon 7392 7x15 Anniversary Edition Binocular

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  • Superb multicoated lenses
  • Quick central focusing
  • BaK-4 high index prism housed in nostalgic body
  • Satin silver and black composite exterior finish
  • Light weight- weighs only 4.9 ounces

Product description

Small but mighty, the Nikon 7x15mm Anniversary binoculars bridge two worlds offering 21st-Century optics with early 20th-Century looks. Retro-minimalist in style, the Anniversary edition delivers great views wherever it’s used by taking full advantage of advances in optical technology.

From the Manufacturer

Celebrating its 80th year in the optics industry, Nikon Sports and Recreational Optics division has introduced a modernized version of the very first consumer binocular.

Nikons new 80th Anniversary Porro prism compact binocular looks identical to the uniquely shaped original 6×15 binocular introduced in 1922. The 7×15 Nikon binocular has been updated by the use of Nikons modern lenses, anti-reflective lens coatings and todays high grade structural materials and construction methods. The Nikon 7×15 features tough, allmetal construction, BaK4 prisms and multi-coated lenses to provide the user with bright, sharp clear viewing. The exterior finish is a satin silver and black composite. The binocular measures just 2″ high and 5.5″ wide, and weighs only 4.9 ounces. The optical system provides an eight degree angle of view along with a 420-foot field of view at 1,000 yards. The 80th Anniversary 7×15 incorporates convenient central focusing and a close distance of only 6.5-feet, allowing detailed observation of nearby objects

Features

  • Reintroduction of Nikons 1st binocular circa 1917
  • Superb multicoated lenses
  • Quick central focusing
  • BaK-4 high index prism housed in nostalgic body

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