New Sinar 4x5 Camera Fresnel Lens+ Ground Glass. This Fresnel screen + ground glass were made of High-Tech optical acrylic, which is the brightest and powerful. The Fresnel lens and ground glass significantly increase the brightness of the image to make focusing much more easier and accurate.
Notice that If one uses a wide angle lens with your camera, one needs a wide angle Fresnel lens with a shorter focusing length to match the wide angle lens to see brighter and sharper images. The wide angle Fresnel lens is currently available also. The condition is unconditionally guaranteed. The Fresnel lens was invented by French physicist Augustine Fresnel, the Augustin Fresnel first used this lens design to build a glass Fresnel lens - lighthouse lens in 1822. The Fresnel lens is a thin, flat optical lens which consists of a series of small narrow concentric grooves on the surface of a lightweight plastic sheet in order to reduce the thickness, weight and cost.
Each groove is at a slightly different angle than the next and with the same focal length in order to focus the light toward a central focal point. Every groove can be considered as an individual small lens to bend parallel Fresnel light waves and focus the light. The lens actually eliminates some spherical aberration. The item "New Sinar 4x5 Camera Fresnel Lens + Ground Glass-Best quality" is in sale since Tuesday, November 8, 2016.This item is in the category "Cameras & Photo\Film Photography\Film Cameras". The seller is "ssoliton11" and is located in Solon, Ohio. This item can be shipped to United States, Canada, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, Mexico, New Zealand, Philippines, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Brazil, Chile, Colombia, Costa rica, Dominican republic, Panama, Trinidad and tobago, Guatemala, El salvador, Honduras, Jamaica, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Ecuador, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Peru, Pakistan, Paraguay, Reunion, Viet nam, Uruguay, Russian federation.