Search results
Results from the WOW.Com Content Network
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.
RE. GN Auto-Topcor 1:1.8 f= 50mm 62 mm filter, introduced 1973 with lens aperture interconnected to distance set on the lens' focusing ring. RE. GN Auto-Topcor M 1:1.4 f= 50mm 62 mm filter, introduced 1973 with lens aperture interconnected to distance set on the lens' focusing ring. [2] RE. Auto-Topcor 1:1.4 f= 58mm 62 mm filter, introduced ...
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.
Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.
You've Got Mail!® Millions of people around the world use AOL Mail, and there are times you'll have questions about using it or want to learn more about its features. That's why AOL Mail Help is here with articles, FAQs, tutorials, our AOL virtual chat assistant and live agent support options to get your questions answered.
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:
Look for a light therapy box that provides 10,000 lux of light exposure, turn it on within the first hour of waking up, and use it for 20 to 30 minutes. Dry air. Bye, bye moisture. Winter air is ...
1. Delta Air Lines. On-Time Arrivals: 83.46% Delta took the top spot in the report for the impressive fourth year in a row. Sure, there’s always going to be unforeseen delays in a trip, but if ...