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Extension tubes are sometimes confused with teleconverters, an optical component (i.e., containing lenses) designed to increase effective focal length. A close-up lens also enables focusing closer for macro photography but, unlike an extension tube, a close-up lens actually is an optical element.
The "macro cine copy X" is a macro lens with specific windows to take copies from 8 mm and 16 mm films. The "microscope adapter X" to adapt the camera body to a microscope. A "reverse adapter X", that can be mounted with an extension tube. A classic "teleconverter 2X". Fuji Photo Recorder back.
That distance is sometimes given on the filter in millimeters. A +3 close-up lens has a maximal working distance of 0.333 m or 333 mm. The magnification is the focal distance of the objective lens (f) divided by the focal distance of the close-up lens; i.e., the focal distance of the objective lens (in meters) multiplied by the diopter value (D) of the close-up lens:
Many macro lenses are characterised by a high amount of chromatic aberration, especially when using reversed-lens, extension tube or close-up lens. Some macro lenses, called apochromatic lenses, are designed to better control this, such as the Laowa 100mm f/2.8 2x Ultra Macro APO and the Sigma APO MACRO 150mm F2.8.
A follow-up inspection in December 2013 identified other violations, but found that the hospice had taken appropriate steps to correct the most serious issues. It wasn’t punished. The same year, regulators cited the Pahrump Health and Rehabilitation Center, a nursing home, for several medication-related violations similar to those detected at ...
Wall Street closed Thursday in about the same shape, with the blue-chip Dow managing to eke out a small gain to snap a 10-day losing streak, the longest in 50 years. The Dow ended up 0.4%, or 15. ...
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