Lens Reviews - Sigma 55-200mm F4-5.6 DC HSM

Overview

Sigma's new HSM lenses for Nikon.

The Incorporation of the HSM enables this lenses to autofocus with all Nikon DSLR cameras (including the D40 and D40x)

The HSM is incorporated into the compact standard zoom lens 18-50mm F3.5-5.6 DC giving this lens the capability to auto focus with all Nikon DSLR cameras(including the D40 and D40x). An Aspherical lens and Super Multi Layer Coatings are used to achieve excellent lens performance and High image quality throughout the entire zoom range.

*Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.

Lens Specifications

Generic Lens Specifications

Lens Type: Zoom
IS / VR / OS: None
Min Focal length (mm): 55
Max Focal Length (mm): 200
Number of Elements: 12
Element Groups: 9
Max Aperture: 4
Minimum Aperture: 22
Diaphragm Blades: 8
Closest Focus Distance (m): 0.11
Maximum Magnification: 1.4
Filter Type: Screw In
Filter Diameter (mm): 55
Diameter at widest (mm): 71
Lens Length (mm): 84
Weight (g): 310

Details

Sample Image

How to read MTF chart

MTF (Modulation Transfer Function) is one of the measurements that evaluates a lens' performance, and it Contrast sensitivity at different spatial frequencies.
The horizontal axis is in millimeters and shows the distance from the center of the image toward the edges, and contrast value (highest value is 1) is shown in the vertical axis.

Sample Image

The readings at 10 lines per millimeter measure the lens's contrast ability (red lines), repeating fine parallel lines spaced at 30 lines per millimeter measure the lens' sharpness ability (green lines), when the aperture is wide open.
Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the frame, are called Sagittal lines (S) and sets of repeating lines vertical to these lines are drawn, called Meridional (M) line sets.

Overview

Lens Specifications

Details

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