Sigma 18-125mm F3.8-5.6 DC HSM is a Variable aperture Auto Focus (AF)
Superzoom Zoom lens with APS-C / DX max sensor coverage, and it is designed to be used with
KAF3 Mount cameras.
The Sigma 18-125mm F3.8-5.6 DC HSM is also available in the Sony Alpha mount.
What type of photography is the Sigma 18-125mm F3.8-5.6 DC HSM lens good for?
The choice of photography type for which you intend to use the Sigma 18-125mm F3.8-5.6 DC HSM is a crucial decision factor. Below, we have assessed its suitability for various photography scenarios:
Reasons to Buy the Sigma 18-125mm F3.8-5.6 DC HSM Lens
Here we've included a summary of the advantages and disadvantages of the Sigma 18-125mm F3.8-5.6 DC HSM lens in a list form to assist you in determining whether it offers the features you need.
| Autofocus |
| Distance Scale |
| Hood supplied |
| Focus Distance Limiter |
| Zoom Lock |
| Versatile Lens with a Zoom Ratio of 6x |
Report a correction
Buy Sigma 18-125mm F3.8-5.6 DC HSM from Amazon or B&H PHOTO
| No Weather Sealing |
| Lens Extends while zooming |
| Slow Aperture at Tele end |
| Variable Aperture |
Lens Mount
Sigma 18-125mm F3.8-5.6 DC HSM is compatible with cameras that have a Pentax KAF3 lens mount. Some of the latest released cameras that are compatible with the Pentax KAF3 lenses are , and .
Size, Weight and Filter Thread
The size and weight are crucial factors to consider when searching for your next lens. Sigma 18-125mm F3.8-5.6 DC HSM has a maximum diameter of 74mm and a total length of 89mm. It weighs 490g / 17.3 oz.
Sigma 18-125mm F3.8-5.6 DC HSM has a filter thread of 62mm. Below are links to the filters that we recommend you to consider for your Sigma 18-125mm F3.8-5.6 DC HSM:
You can also check All Pentax KAF Mount Lenses with 62mm Filter Thread Size to find the matching lenses.
Focal Range
Sigma 18-125mm F3.8-5.6 DC HSM has a focal range of 18-125mm and 6.9X zoom ratio which has a 35mm equivalent focal range of 27-187.5mm when used on a APS-C / DX format camera.
Optical Image Stabilization
Sigma 18-125mm F3.8-5.6 DC HSM doesn't have an optical image stabilization system so the only option to stabilize the image taken with this lens is to mount on a camera body with IBIS (sensor based In-body image stabilization).
Zoom Lock
Sigma 18-125mm F3.8-5.6 DC 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 18-125mm F3.8-5.6 DC HSM has a Max Magnification Ratio of 0.26x with a minimum focusing distance of 0.35m. For a non-macro lens, the 0.26x is considered a high magnification and will come handy for close-up shots.
Below are the 2 Superzoom Zoom type Pentax KAF3 mount lens alternatives with highest max magnification ratios:
Aperture
Sigma 18-125mm F3.8-5.6 DC HSM is a variable aperture lens with a max aperture of f3.8 and a minimum aperture of f22 at 18mm, and a max aperture of f5.6 and minimum aperture of f36 at 125mm .
| Focal Length |
Max Aperture |
Min Aperture |
|
18mm
|
F3.8 |
F22 |
|
125mm
|
F5.6 |
F36 |
Optical Formula
Sigma 18-125mm F3.8-5.6 DC HSM's optical formula consists of 16 elements in 12 groups . The following special elements are used in this design:
- 2 SLD (Special Low Dispersion) glass elements
- 1 molded glass aspherical
element 2 hybrid aspherical elements
Lens Hood
Sigma 18-125mm F3.8-5.6 DC HSM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.
Popular Comparisons of Sigma 18-125mm F3.8-5.6 DC HSM
Here are the 8 most popular comparisons of the Sigma 18-125mm F3.8-5.6 DC HSM amongst Camera Decision readers.
Top Alternatives of Sigma 18-125mm F3.8-5.6 DC HSM Lens
In addition, it would be interesting to check which lenses from other mounts are most commonly compared with the Sigma 18-125mm F3.8-5.6 DC HSM.
Top Alternatives of Sigma 18-125mm F3.8-5.6 DC HSM in Other Lens Mounts
**This post contains affiliate links, and I will be compensated if you make a purchase after clicking through my links. As an Amazon Associate, I earn from qualifying purchases.
