Types ofobjectivelenses

To make one, you'll need a cardboard tube, white paper, aluminum foil, tape and a pushpin or something else sharp to poke a small hole. According to "Let's Talk Science," you can put this viewer together with these steps:

• Infinity Plan Achromatic Objective• 40X Magnification Power (With standard 10x eyepieces)• 4X/0.10• Working distance 22mm• Standard RMS thread• 5-Year Warranty

High powerobjective lens

Sticking with the theme of using items you can easily find around the house, tube viewers can be made using cardboard tubes from household items like paper towels or toilet paper rolls. You can also use thick cardstock rolled up and taped to make your own tube.

While cities brace for traffic, schools brace for absences and space enthusiasts are planning parties, the glasses that enable safe viewing of the eclipse have become something of a hot commodity.

10xobjective lens

This NASA project uses components you almost certainly already have at home. Using a cereal box, cardboard, foil, paper, scissors and tape or glue, you can put together this projection eclipse viewer.

Low powerobjective lens

4x objective lensname

60X Achromat Objective Lens for Compound Biological Microscope Fits DIN/JIS standard thread sizes Achromatic Objective DIN Standard 20mm Thread S...

The infinite plan or infinity-corrected objective is the most advanced type of objective lens. Because of its superior resolution and very high degree of correction for both chromatic and spherical aberration, the infinite plan objective has become the first choice for research-grade, medical and industrial microscopes.

Our Microscope Optics Cleaning Kit is the perfect solution for keeping your microscopes objectives and eyepieces in top working condition. This kit...

Luckily, people who didn't manage to get their hands on glasses are not completely down and out. There are other safe ways to view the eclipse, say experts, and a lot of them only require a little bit of craftiness and items you can find lying around the house.

4x objective lenstotal magnification

Another super easy version that requires no crafting? A kitchen colander. An ordinary kitchen colander can easily be used to view a solar eclipse in the same way as other projector viewers; the colander's circular holes project crescent images of the sun onto the ground.

Objective lensmicroscope

20X Achromat Objective Lens for Compound Biological Microscope Fits DIN/JIS standard thread sizes Achromatic Objective DIN Standard 20mm Thread Si...

While the Planetary Society also offers instructions for box or projector viewers that are more "fancy," as they put it, it doesn't get easier than their simple pinhole paper projector.

Objective lensmagnification

As a reminder, none of these options allow you to look directly at the eclipse: you need special eclipse glasses for that.

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To make the "fancier" version, you'll need 2 index cards (larger, 5-by-7 or A5 cards work better for this) or small paper plates for each person, a pencil, pushpins and a towel, sweatshirt, blanket, flattened corrugated cardboard box, carpet, or other soft substrate to place underneath card during pin pushing.

Peeking directly at the eclipse before it reaches totality without proper eye protection can cause permanent eye damage, experts have warned, making glasses a necessity for safe viewing. But, as the day approaches, they may become harder to find.

100X Achromat Objective Lens for Compound Biological Microscope Fits DIN/JIS standard thread sizes Achromatic Objective DIN Standard 20mm Thread ...

To make it, you only need two index cards (3-by-5 or A6 or A7 size) or small paper plates for each person and basic pushpins. Simply use the pushpin to punch a small hole close to the middle of one of the cards and you're done.

Immersion Oil In polyethylene dropping bottleImmersion oil is used when viewing specimens with the 100x immersion oil objective, as it's designed s...