High-class Tele Macro Lens
As a super performance (SP) lens, this lens belongs to the best macro lenses in the world. It has very good resolution ability, strongly decreased light fall-off up to the edges, minimized chromatic aberration and excellent stray light behavior making this lens the first choice for digital APS-C and full frame cameras. This lens was constructed for macro functionality; however, it also makes an excellent figure with medium-tele shots and shines with its extremely sharp, high contrast and high brilliant results. The SP 180mm F/3.5 Di's characteristics also lend themselves to indoor, close-range sports shooting and beautiful environmental portraiture. This lens stands in the tradition of the legendary 90mm 1:1 macro.
Apart from the long focal length the lens also offers a big working distance, which is often required for capturing images of small creatures. A special FEC (Filter Effect Control) function reintroduces ease to the use of a polarizing filter
The optical design of this lens uses a high-performance XLD (Extra Low Dispersion) element, which is manufactured out of a special glass with an extremely low refractive index. The refractive index describes the ability of the lens to split a light beam into its spectral colours. The dispersive properties are even lower than standard LD lenses and are at a level similar to fluorite. The XLD lens in combination with the LD element delivers the highest contrast and brilliance. This effectively prevents the problem of chromatic aberration in telephoto photography and delivers a high level of sharpness even in the peripheral regions. The result is a lens that effectively compensates for axial chromatic aberration and magnification aberration throughout the entire zoom range and guarantees the highest resolution and brilliance for your pictures.
This lens offers a 1:1 magnification ratio to enable you to focus in on even the smallest details. It is thus ideal for close-up photos of animals and plants, as well as for still life photography. As a result of the excellent image quality and high luminosity, the macro lens has also proved a popular choice for portrait photography.
|Angle of View (diagonal)||13°42’ for full-frame format
8°52’ for APS-C format
|Lens Construction||14 elements in 11 groups|
|Minimum Focus Distance||0.47m|
|Max. Magnification Ratio||1:1|
|Diaphragm Blade Number||7 (circular diaphragm)|
|Standard Accessories||Lens caps|
|Compatible Mounts||Canon, Nikon, Sony|
Specifications, appearance, functionality, etc. may be changed without prior notice.
MTF (Modulation Transfer Function) curves describe to what extent the tested lens can faithfully reproduce contrast of the subject in images it captures.
The closer the 10 lp/mm (line pairs per millimeter) curve (the thick line for low frequency) in an MTF chart to "1" of the vertical axis (the higher up), the higher the contrast reproduction performance of the tested lens will be. The closer the 30 lp/mm curve (the thin line for high frequency) to "1" (the higher up), the higher the resolving power and thus the subjective sharpness of the lens will be.
Lens performance differs depending upon directions. Solid lines show performance in the sagittal (radial) direction while dotted lines indicate performance in the meridional (circumferential) direction. When sharp lenses capable of delivering uniform optical performance over the entire image field are tested, MTF charts show curves plotted in good balance.
Performance characteristics of photographic lenses cannot be expressed with only MTF charts. There are other factors that are expressed in different methods, such as taste of softness and degrees of compensation of various aberrations. But you can use MTF charts as a scale to measure lens performance.