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Sigma 18-50mm F2.8-4.5 DC OS HSM Nikon F (DX) Review

Sigma 18-50mm F2.8-4.5 DC OS HSM

Main Features

  • 18-50mm Focal Range
  • F2.8 - F4.5 Max Aperture
  • Image Stabilization
  • Filter Thread: 67mm
  • Max Format: APS-C / DX
  • Nikon F (DX) Mount
  • Weight: 395g.
  • Diameter: 74mm
  • Length: 89mm
  • Min Focus Distance:0.3m
  • Max Magnification:0.24x
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Sigma 18-50mm F2.8-4.5 DC OS HSM Overview

Sigma 18-50mm F2.8-4.5 DC OS HSM is a Variable aperture Auto Focus (AF) Superzoom Zoom lens with Optical Image stabilization and APS-C / DX max sensor coverage, and it is designed to be used with Nikon F (DX) mount cameras.

What type of photography is the Sigma 18-50mm F2.8-4.5 DC OS HSM lens good for?

The type of photography that you are planning to use the Sigma 18-50mm F2.8-4.5 DC OS HSM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:

Photography Type Suitability
Bird/WildlifeFair
SportsAverage
PortraitVery Good
TravelVery Good
StreetVery Good
WeddingVery Good
Walk AroundVery Good
VloggingVery Good
LandscapeVery Good
MacroFair

Reasons to Buy Sigma 18-50mm F2.8-4.5 DC OS HSM Lens

Here, we've included a summary of the advantages and disadvantages of the Sigma 18-50mm F2.8-4.5 DC OS HSM lens in a list form to help you determine whether it offers the features you need.

PROs
Optical Image Stabilization
Autofocus
Distance Scale
Hood supplied
Internal Focusing
Fast Aperture at Wide end
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Buy Sigma 18-50mm F2.8-4.5 DC OS HSM from Amazon or B&H PHOTO


CONs
No Weather Sealing
Variable Aperture

Lens Mount

Sigma 18-50mm F2.8-4.5 DC OS HSM is compatible with cameras that have Nikon F (DX) lens mount. Some of the latest released cameras that are compatible with the Nikon F (DX) lenses are Nikon D3500, Nikon D7500 and Nikon D5600.

Sigma 18-50mm F2.8-4.5 DC OS HSM is also available in Canon EF , Pentax KAF3, 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 18-50mm F2.8-4.5 DC OS HSM has a maximum diameter of 74mm and total length of 89mm. It weighs 395g / 13.9 oz.

Sigma 18-50mm F2.8-4.5 DC OS HSM has a filter thread of 67mm.

Focal Range

Sigma 18-50mm F2.8-4.5 DC OS HSM has a focal range of 18-50mm and 2.8X zoom ratio which has a 35mm equivalent focal range of 27-75mm when used on a APS-C / DX format camera.

Optical Image Stabilization

Sigma 18-50mm F2.8-4.5 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 18-50mm F2.8-4.5 DC OS HSM features Rotary (internal) zoom method where the length of the lens doesn't change while you are zooming in or out. Even though this design has a size disadvantage in general compare to extending designs, it has the benefits of better sealing against dust and moisture, no zoom creep and no weight balance shift while zooming.

Maximum Magnification Ratio

Sigma 18-50mm F2.8-4.5 DC OS HSM has a Max Magnification Ratio of 0.24x and has a minimum focusing distance of 0.3m.

Aperture

Sigma 18-50mm F2.8-4.5 DC OS HSM is a variable aperture lens with a max aperture of f2.8 and a minimum aperture of f22 at 18mm, and a max aperture of f4.5 and minimum aperture of f36 at 50mm .

Focal Length Max Aperture Min Aperture
18mm F2.8 F22
50mm F4.5 F36

Optical Formula

Sigma 18-50mm F2.8-4.5 DC OS HSM's optical formula consists of 16 elements in 12 groups . Following special elements are used in this design:

  • 2 SLD glass elements
  • 3 aspherical elements

Lens Hood

Sigma 18-50mm F2.8-4.5 DC OS HSM comes with a removable lens hood which is handy to reduce lens flare and glare in your photos.

Popular Comparisons of Sigma 18-50mm F2.8-4.5 DC OS HSM

Here is the eight most popular comparisons of Sigma 18-50mm F2.8-4.5 DC OS HSM amongst Camera Decision readers.

Top Alternatives of Sigma 18-50mm F2.8-4.5 DC OS HSM Lens
Model Coverage Weight Focusing Street Price
Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR Lens Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR
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APS-C / DX 265gr AF Amazon B&H Photo
Nikon AF-P DX NIKKOR 18-55mm F3.5-5.6G Lens Nikon AF-P DX NIKKOR 18-55mm F3.5-5.6G
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APS-C / DX 195gr AF Amazon B&H Photo
Tamron SP AF 17-50mm F2.8 XR Di II VC LD Aspherical IF Lens Tamron SP AF 17-50mm F2.8 XR Di II VC LD Aspherical IF
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APS-C / DX 570gr AF Amazon B&H Photo
Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR II Lens Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR II
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APS-C / DX 195gr AF Amazon B&H Photo
Tamron SP AF 17-50mm F2.8 XR Di II LD Aspherical IF Lens Tamron SP AF 17-50mm F2.8 XR Di II LD Aspherical IF
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APS-C / DX 430gr AF Amazon B&H Photo
Nikon AF-S DX Nikkor 17-55mm f2.8G ED-IF Lens Nikon AF-S DX Nikkor 17-55mm f2.8G ED-IF
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APS-C / DX 755gr AF Amazon B&H Photo
Tokina AF-X Pro 16-50mm f2.8 DX Lens Tokina AF-X Pro 16-50mm f2.8 DX
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APS-C / DX 610gr AF Amazon B&H Photo
Pentax smc DA 16-45mm F4 ED AL Lens Pentax smc DA 16-45mm F4 ED AL
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APS-C / DX 356gr AF Amazon B&H Photo

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**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.

Sigma 18-50mm F2.8-4.5 DC OS HSM Alternatives in Nikon F (DX) Mount
Model Coverage Weight Focusing Street Price
Nikon AF-S DX Nikkor 17-55mm f2.8G ED-IF Lens Nikon AF-S DX Nikkor 17-55mm f2.8G ED-IF
Compare
APS-C / DX 755gr AF Amazon B&H Photo
Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G II Lens Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G II
Compare
APS-C / DX 205gr AF Amazon B&H Photo
Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR Lens Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR
Compare
APS-C / DX 265gr AF Amazon B&H Photo
Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR II Lens Nikon AF-S DX Nikkor 18-55mm f3.5-5.6G VR II
Compare
APS-C / DX 195gr AF Amazon B&H Photo
Nikon AF-P DX NIKKOR 18-55mm F3.5-5.6G VR Lens Nikon AF-P DX NIKKOR 18-55mm F3.5-5.6G VR
Compare
APS-C / DX 205gr AF Amazon B&H Photo
Nikon AF-P DX NIKKOR 18-55mm F3.5-5.6G Lens Nikon AF-P DX NIKKOR 18-55mm F3.5-5.6G
Compare
APS-C / DX 195gr AF Amazon B&H Photo
Tokina AF-X Pro 16-50mm f2.8 DX Lens Tokina AF-X Pro 16-50mm f2.8 DX
Compare
APS-C / DX 610gr AF Amazon B&H Photo
Sigma 17-50mm F2.8 EX DC OS HSM Lens Sigma 17-50mm F2.8 EX DC OS HSM
Compare
APS-C / DX 565gr AF Amazon B&H Photo
Tamron SP AF 17-50mm F2.8 XR Di II LD Aspherical IF Lens Tamron SP AF 17-50mm F2.8 XR Di II LD Aspherical IF
Compare
APS-C / DX 430gr AF Amazon B&H Photo
Tamron SP AF 17-50mm F2.8 XR Di II VC LD Aspherical IF Lens Tamron SP AF 17-50mm F2.8 XR Di II VC LD Aspherical IF
Compare
APS-C / DX 570gr AF Amazon B&H Photo

Sigma 18-50mm F2.8-4.5 DC OS HSM Detailed Specifications


General
Brand Sigma
Lens Type Zoom
Lens Type SuperZoom
Lens Mount Nikon F (DX)
Max Format APS-C / DX
Focal Range 18-50mm
Image Stabilization Yes
Colour Unknown
Zoom Method Rotary (internal)
Power Zoom No Zoom
Zoom Lock No Zoom
Zoom Ratio 2.8X
APERTURE
Max Aperture F2.8 - F4.5
Min Aperture F22.0 - F36.0
Aperture Ring No
Diaphragm Blades 7
Optics
Optical Elements 16
Optical Groups 12
Special Elements 2 SLD glass elements 3 aspherical elements

FOCUSING
Min Focus Distance 0.3m
Max Magnification 0.24X
Autofocus Yes
AF Motor Type Ultrasonic
Full Time Manual No
Focus Method Internal
Focus Distance Limiter No
Distance Scale Yes
DoF Scale No
PHYSICAL SPECS
Weight 395g
Diameter 74mm
Length 89mm
Materials Metal mount
Weather Sealing No
Filter Thread 67mm
Filter Notes Does not rotate on focusing
Hood Supplied Yes
Tripod Collar No
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Frequently Asked Questions about Sigma 18-50mm F2.8-4.5 DC OS HSM
is the Sigma 18-50mm F2.8-4.5 DC OS HSM a Weather Sealed lens?
What is the Minimum Focusing Distance of Sigma 18-50mm F2.8-4.5 DC OS HSM
is the Sigma 18-50mm F2.8-4.5 DC OS HSM an Autofocus (AF) lens?
What is the Filter Thread Size of Sigma 18-50mm F2.8-4.5 DC OS HSM
Does Sigma 18-50mm F2.8-4.5 DC OS HSM have Image Stabilization?
Does Sigma 18-50mm F2.8-4.5 DC OS HSM have Aperture Ring?
What is the Maximum Magnification Ratio of Sigma 18-50mm F2.8-4.5 DC OS HSM
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