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.
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.
The Fotodiox LM-NKZ-PRN is another autofocus Leica M to Z adapter. [118] The Megadap MTZ11 contains a focusing helicoid with 6.5 mm of extension which is used for autofocus. This range is sufficient to cover the full focusing range of lenses up to around 50 mm focal length. [119]
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:
The bodies of stock cars can be modified for motorsport purposes while retaining their main characteristics. The DrivAer high-performance (hp) configuration, [ 9 ] a parametric academic model, provides an open-source wind tunnel dataset and serves as a benchmark, particularly valuable when combined with the original DrivAer Fastback (F ...
to suck up blood or secretions Surgical scissors: used for dissecting or cutting Thermometer: to record body temperature: Tongue depressor: for use in oral examination Transfusion kit: to transfuse blood and blood products Tuning fork: to test for deafness and to categorize it Ventilator
a list of define constant instructions, e.g., for the DCB macro—DTF (Define The File) for DOS [30] —or a combination of code and constants, with the details of the expansion depending on the parameters of the macro instruction (such as a reference to a file and a data area for a READ instruction);
A first aid kit or medical kit is a collection of supplies and equipment used to give immediate medical treatment, primarily to treat injuries and other mild or moderate medical conditions. There is a wide variation in the contents of first aid kits based on the knowledge and experience of those putting it together, the differing first aid ...