Sigma 18-250mm 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.
What type of photography is the Sigma 18-250mm F3.5-6.3 DC OS HSM lens good for?
The type of photography that you are planning to use the Sigma 18-250mm F3.5-6.3 DC OS HSM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:
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Lenses in Pentax KAF3 Mount with Same Focal and Aperture Range
Reasons to Buy Sigma 18-250mm F3.5-6.3 DC OS HSM Lens
Here, we've included a summary of the advantages and disadvantages of the Sigma 18-250mm F3.5-6.3 DC OS HSM lens in a list form to help you determine whether it offers the features you need.
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| Optical Image Stabilization
| Distance Scale
| DoF(Depth of Field) Scale
| Hood supplied
| Zoom Lock
| Versatile Lens with a Zoom Ratio of 13x
Buy Sigma 18-250mm F3.5-6.3 DC OS HSM from Amazon or B&H PHOTO
| Lens Extents while zooming
| Slow Aperture at Tele end
| Variable Aperture
Sigma 18-250mm 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 , and .
Sigma 18-250mm F3.5-6.3 DC OS HSM is also available in Canon EF , Nikon F (DX), Pentax KAF3, Sony Alpha, Sigma SA, Canon EF, Nikon F (DX), Sony Alpha and Sigma SA mounts.
Size, Weight and Filter Thread
Size and weight is a very important decision factor when searching for your next lens. Sigma 18-250mm F3.5-6.3 DC OS HSM has a maximum diameter of 79mm and total length of 101mm when not extended . It weighs 628g / 22.2 oz.
Sigma 18-250mm F3.5-6.3 DC OS HSM has a filter thread of 72mm.
Sigma 18-250mm F3.5-6.3 DC OS HSM has a focal range of 18-250mm and 13.9X zoom ratio which has a 35mm equivalent focal range of 27-375mm when used on a APS-C / DX format camera.
Optical Image Stabilization
Sigma 18-250mm 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.
Sigma 18-250mm 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.
Sigma 18-250mm 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 18-250mm F3.5-6.3 DC OS HSM has a Max Magnification Ratio of 0.29x and has a minimum focusing distance of 0.45m. For a non-macro lens, the 0.29x is considered a high magnification and will come handy for close-up shots.
Sigma 18-250mm 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 f40 at 250mm .
Sigma 18-250mm F3.5-6.3 DC OS HSM's optical formula consists of 18 elements in 14 groups . Special elements used in this design is 4 SLD glass elements 3 aspherical elements.
Sigma 18-250mm 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.
Sigma 18-250mm F3.5-6.3 DC OS HSM is available in Black color.
Popular Comparisons of Sigma 18-250mm F3.5-6.3 DC OS HSM
Here is the eight most popular comparisons of Sigma 18-250mm F3.5-6.3 DC OS HSM amongst Camera Decision readers.