Sigma 18-300 F3.5-6.3 DC OS HSM is a Variable aperture Auto Focus (AF)
Super Telephoto Zoom lens with Optical Image stabilization and APS-C / DX max sensor coverage, and it is designed to be used with Pentax KAF3 mount cameras.
Lens Mount
Sigma 18-300 F3.5-6.3 DC OS HSM is compatible with cameras that have Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF3 lenses are Pentax K-3 III, Pentax KP and Pentax K-70.
Sigma 18-300 F3.5-6.3 DC OS HSM is also available in Canon EF , Nikon F (DX), Sigma SA and Sony Alpha mounts.
Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Sigma 18-300 F3.5-6.3 DC OS HSM has a maximum diameter of 79mm and total length of 102mm when not extended .
Sigma 18-300 F3.5-6.3 DC OS HSM has a filter thread of 72mm.
Focal Range
Sigma 18-300 F3.5-6.3 DC OS HSM has a focal range of 18-300mm and 16.7X zoom ratio which has a 35mm equivalent focal range of 27-450mm when used on a APS-C / DX format camera.
Optical Image Stabilization
Sigma 18-300 F3.5-6.3 DC OS HSM features an optical image stabilization system which helps to reduce the blur that occurs due to shaking during hand-held shooting.
Zoom Method
Sigma 18-300 F3.5-6.3 DC OS HSM features Rotary (extending) zoom method where the length of the lens changes as you zoom in or out. This makes it possible to design the lens with a smaller minimum length ( generally when it is zoomed out) compared to internal zoom lenses. The disadvantages of this design are being harder to seal against dust and moisture, weight balance shifting while zooming and zoom creep in certain lenses.
Zoom Lock
Sigma 18-300 F3.5-6.3 DC OS HSM has a Zoom lock feature which eliminates Zoom creep where focal length of the lens changes with gravity when it's held downwards or upwards.
Maximum Magnification Ratio
Sigma 18-300 F3.5-6.3 DC OS HSM has a Max Magnification Ratio of 0.33x and has a minimum focusing distance of 0.39m. For a non-macro lens, the 0.33x is considered a high magnification and will come handy for close-up shots.
Aperture
Sigma 18-300 F3.5-6.3 DC OS HSM is a variable aperture lens with a max aperture of f3.5 and a minimum aperture of f22 at 18mm, and a max aperture of f6.3 and minimum aperture of f22 at 300mm .
| Focal Length |
Max Aperture |
Min Aperture |
|
18mm
|
F3.5 |
F22 |
|
300mm
|
F6.3 |
F22 |
Optical Formula
Sigma 18-300 F3.5-6.3 DC OS HSM's optical formula consists of 13 elements in 17 groups . Following special elements are used in this design:
- One Special Low Dispersion (SLD)
- Four F Low Dispersion (FLD)
Lens Hood
Sigma 18-300 F3.5-6.3 DC OS HSM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Body Colour
Sigma 18-300 F3.5-6.3 DC OS HSM is available in Black color.
Popular Comparisons of Sigma 18-300 F3.5-6.3 DC OS HSM
Here is the eight most popular comparisons of Sigma 18-300 F3.5-6.3 DC OS HSM amongst Camera Decision readers.