Standard for lightweight long-range zooms
Compact top tele-zoom lens with macro 1:2 function. A high mechanical quality combined with excellent optical qualities are the characteristic features of this telephoto lens. This Di lens can be used on a digital APS-C sized or full frame camera. This lens ideally complements standard kit lenses.
A 'Macro Switchover' mechanism allows a minimum focus distance of 0.95m within the focal length range of 180-300mm. You can fill the entire frame with subjects of apx. 5 x 7cm size, at a maximum magnification ratio of 1:2, ideal for capturing images of flowers, insects and objects of similar size. With its 300mm tele-end the lens guarantees ultimate photo fun.
The designation “Di” (Digitally Integrated Design) marks a generation of lenses, which have been specially adapted to the higher requirements of digital SLR cameras (APS-C and full frame).
|Angle of View (diagonal)||
34°21’(for full-frame format)
8°15’ (for APS-C format)
|Lens Construction||13 elements in 9 groups|
|Minimum Focus Distance||0.95m|
|Max. Magnification Ratio||1:2|
|Diaphragm Blade Number||9/td>|
|Standard Accessories||Lens hood, Lens caps|
|Compatible Mounts||Canon, Nikon, Pentax, 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.