Why do we need grommets?

What is the point of an eye with a camera? When I bought my Nikon D5000 won two eye. One that was already attached to the camera, a rubber band. And the other was plastic. What little eye in this picture: What is the point http://hothardware.com/articleimages/Item1411/Nikon-D5000-box-4534.jpg different eyepieces?

What appears in the image-content of the standard D5000-Kit is a cup of sight, but the eyes of a plug. The roof of the eye is a plastic cover black with no windows, replacing the eyepiece rubber body. The objective view of the PAC to prevent entry of light mirror box for the viewer window. The diffuse light has the ability counting and the effect it can possibly affect the contrast of the photos if strong enough. This is particularly important when shooting off-camera (ie remote, home, self-timer, interval timer, rotate, etc.). Alternatively, it may be useful in protecting the display window of storage. Eyepieces Aftermarket there and come in different shapes and sizes. It's all about comfort and utility. Some are better at filling in the viewer's eye than others. Also Cup is eye diopter lenses, or alternatively, although it can fit into their own categories.

D90 Unboxing

Nikon EH-6 AC Adapter $84.00 EH-6 AC Adapter Power Supply for the D2 Digital Series SLR Cameras…

Greenlee 45651 NA Fiber Optic Fiber Optic Inspection Microscope with Rubber Eyecup 45651 Fiber Optic Inspection Microscope with Rubber EyecupHigh-powered microscope is used to check a connector’s end face for excess epoxy, core or cladding chips or other irregularities that degrade optical performance of the connector.Features:Laser Safety FilterRubber EyecupAluminum HousingMagnifies up to 200xFor more than 140 years, Greenlee has been a provider of quality tools to the woodworking i…

Celestron Outland X 8×25 Binocular, Black $41.99 Celestron Outland X 8X25 Waterproof…

Citiwell National Geographic NG430 Binoculars See what you can spot with these pocket-sized National Geographic NG430 4×30 Binoculars!This fabulous binocular features 30mm glass objective lenses, rubber eyecups and strap. The National Geographic NG430 4×30 Binoculars is a perfect starter set for young naturalists. The compact size is ideal for little hands and the built-in compass enables you to take directional bearings. With the National Ge…

DISSECTING MICROSCOPE 20x – 40x STEREO BINOCULAR $349.99 Great Features for Stereoscopic Imaging: This microscope is designed for high quality stereoscopic viewing of a wide range of specimens. This microscope is manufactured with a rotating 2x – 4x stereo objective made from premium ground optical glass. Used in conjunction with the 10x (20mm) stereo eyepieces, you can achieve magnifications of 20x and 40x right out of the box. We offer a range of opti…

MEADE Meade 6-Piece Outdoor Adventure Pack Set – Backpack, Binoculars, Multi-… $35.98 The 6 pieces are: 10 x 50mm Meade binocular, featuring Meade’s legendary optical technology and design, including solid, high quality construction. This binocular features multi-coated lenses for clear, bright viewing, rubber coating for durability. The rugged backpack easily holds your Meade binocular and all its accessories. Comfortable, padded shoulder straps, with waist and chest straps offer …

Fotodiox Eye Cup Eyecup for Canon EOS Digital Rebels xt, xti, xs, xsi, t1i, t2i, 300D, 350D, 400D, 450D, 500D. 550D, 1000D $5.95 Fotodiox Eye Cup Eyecup for Canon EOS Digital Rebels xt, xti, xs, xsi, t1i, t2i, 300D, 350D, 400D, 450D, 500D. 550D, 1000D…

Nikon DK-21 Rubber Eyecup Nikon Digital SLR Cameras $4.25 DK-21 Rubber Eyecup for D200 (repl.) Attaches to the viewfinder eyepiece minimizing extraneous light and vision fatigue…

Bushnell H2O 10×42 Porro Prism Waterproof/Fogproof Binocular $69.95 Spend enough time in the water, and chances are your equipment will spend some time in it. That’s why Bushnell had the foresight to build the H2O series of binoculars, which are O-ring-sealed and nitrogen-purged to completely lock out moisture should you spill water on the housing, take your binoculars overboard, or simply run into foul weather along the way. The H2O binoculars feature rubber armo…

Bushnell Spacemaster 15-45×50mm 45 Degree Collapsible Spotting Scope Silver Black Compact Tripod $177.99 …

Barska 8×30 Waterproof Crossover Binoculars $85.11 BAK-4 prisms for crisp and clear images, Twist-up eyecups, Large center focus knob, Rugged shock-absorbing rubber armor, Non-slip and ergonomic design for a secure grip

Barska 10×42 WP Crossover Mossy Oak Blaze Binoculars $0 These binoculars from Barska have been engineered to perform best under harsh conditions. These optics feature a unique Mossy Oak Blaze camo that makes you invisible to prey while still matching hunting regulation safety orange.