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Sigma 18-300 F3.5-6.3 DC Macro OS HSM KAF3 Mount Review

Sigma 18-300 F3.5-6.3 DC Macro OS HSM

Main Features

  • 18-300mm Focal Range
  • F3.5 - F6.3 Max Aperture
  • Image Stabilization
  • Filter Thread: 72mm
  • Max Format: APS-C / DX
  • Pentax KAF3 Mount
  • Weight: 585g / 1.29 lb
  • Dimensions(øxL): 79mm x 102mm
  • Min Focus Distance: 0.39m
  • Max Magnification: 0.33x
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Sigma 18-300 F3.5-6.3 DC OS HSM Overview


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 KAF3 Mount cameras.

What type of photography is the Sigma 18-300 F3.5-6.3 DC OS HSM lens good for?

The type of photography that you are planning to use the Sigma 18-300 F3.5-6.3 DC OS HSM is an important decision factor. Here we have evaluated its suitability to various photography scenarios:

Photography Type Suitability
Bird/WildlifeGood
SportsGood
PortraitGood
TravelExcellent
StreetGood
WeddingGood
Walk AroundVery Good
VloggingGood
LandscapeGood
MacroAverage

Reasons to Buy Sigma 18-300 F3.5-6.3 DC Macro OS HSM Lens

Here we've included a summary of the advantages and disadvantages of the Sigma 18-300 F3.5-6.3 DC Macro 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
Full-time Manual Focusing
Zoom Lock
Versatile Lens with a Zoom Ratio of 16x
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Buy Sigma 18-300 F3.5-6.3 DC OS HSM from Amazon or B&H PHOTO


CONs
No Weather Sealing
Lens Extents while zooming
Slow Aperture at Tele end
Variable Aperture


Lens Mount

Sigma 18-300 F3.5-6.3 DC OS 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 Pentax K-3 III Monochrome, Pentax KF and Pentax K-3 III.

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. It weighs 585g / 20.6 oz.

Sigma 18-300 F3.5-6.3 DC OS HSM has a filter thread of 72mm. Below are links to the filters that we recommend you to consider for your Sigma 18-300 F3.5-6.3 DC OS HSM:

  • 72mm Variable ND Lens Filters
  • 72mm Circular Polarizer Lens Filters
  • 72mm Clear Protection Lens Filters




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

The 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 are the eight most popular comparisons of the Sigma 18-300 F3.5-6.3 DC OS HSM amongst Camera Decision readers.

Top Alternatives of Sigma 18-300 F3.5-6.3 DC OS HSM Lens
Model Coverage Weight Focusing Street Price
Pentax smc DA 18-270mm F3.5-6.3 ED SDM Lens Pentax smc DA 18-270mm F3.5-6.3 ED SDM
Compare
APS-C / DX 453 g / 1.00 lb AF Amazon B&H Photo
Tamron 18-400mm F3.5-6.3 Di II VC HLD Lens Tamron 18-400mm F3.5-6.3 Di II VC HLD
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APS-C / DX 710 g / 1.56 lb AF Amazon B&H Photo
Sigma 18-250mm F3.5-6.3 DC Macro OS HSM Lens Sigma 18-250mm F3.5-6.3 DC Macro OS HSM
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APS-C / DX 470 g / 1.03 lb AF Amazon B&H Photo
Tamron AF 18-250mm F3.5-6.3 Di II LD Aspherical IF Macro Lens Tamron AF 18-250mm F3.5-6.3 Di II LD Aspherical IF Macro
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APS-C / DX 430 g / 0.95 lb AF Amazon B&H Photo
Tamron AF 28-300mm F3.5-6.3 XR Di LD Aspherical IF Macro Lens Tamron AF 28-300mm F3.5-6.3 XR Di LD Aspherical IF Macro
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35mm FF 420 g / 0.92 lb AF Amazon B&H Photo
Sigma 18-250mm F3.5-6.3 DC OS HSM Lens Sigma 18-250mm F3.5-6.3 DC OS HSM
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APS-C / DX 628 g / 1.38 lb AF Amazon B&H Photo
Pentax smc DA 18-250mm F3.5-6.3 Lens Pentax smc DA 18-250mm F3.5-6.3
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APS-C / DX 455 g / 1.00 lb AF Amazon B&H Photo
Samsung D-Xenon 18-250mm F3.5-6.3 Lens Samsung D-Xenon 18-250mm F3.5-6.3
Compare
APS-C / DX 455 g / 1.00 lb AF Amazon B&H Photo


**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 18-300 F3.5-6.3 DC Macro OS HSM Alternatives in Pentax KAF3 Mount
Model Coverage Weight Focusing Street Price
Pentax smc DA 18-250mm F3.5-6.3 Lens Pentax smc DA 18-250mm F3.5-6.3
Compare
APS-C / DX 455 g / 1.00 lb AF Amazon B&H Photo
Pentax smc DA 18-270mm F3.5-6.3 ED SDM Lens Pentax smc DA 18-270mm F3.5-6.3 ED SDM
Compare
APS-C / DX 453 g / 1.00 lb AF Amazon B&H Photo
Samsung D-Xenon 18-250mm F3.5-6.3 Lens Samsung D-Xenon 18-250mm F3.5-6.3
Compare
APS-C / DX 455 g / 1.00 lb AF Amazon B&H Photo
Sigma 18-250mm F3.5-6.3 DC Macro OS HSM Lens Sigma 18-250mm F3.5-6.3 DC Macro OS HSM
Compare
APS-C / DX 470 g / 1.03 lb AF Amazon B&H Photo
Sigma 18-250mm F3.5-6.3 DC OS HSM Lens Sigma 18-250mm F3.5-6.3 DC OS HSM
Compare
APS-C / DX 628 g / 1.38 lb AF Amazon B&H Photo
Tamron AF 18-250mm F3.5-6.3 Di II LD Aspherical IF Macro Lens Tamron AF 18-250mm F3.5-6.3 Di II LD Aspherical IF Macro
Compare
APS-C / DX 430 g / 0.95 lb AF Amazon B&H Photo

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Sigma 18-300 F3.5-6.3 DC OS HSM Detailed Specifications


General
Brand Sigma
Lens Type Zoom
Lens Type SuperZoom
Lens Mount Pentax KAF3
Max Format APS-C / DX
Focal Range 18-300mm
Image Stabilization Yes
Colour Black
Zoom Method Rotary (extending)
Power Zoom No
Zoom Lock Yes
Zoom Ratio 16.7X
APERTURE
Max Aperture F3.5 - F6.3
Min Aperture F22
Aperture Ring No
Diaphragm Blades 7
Optics
Optical Elements 13
Optical Groups 17
Special Elements One Special Low Dispersion (SLD) and Four F Low Dispersion (FLD)

FOCUSING
Min Focus Distance 0.39m
Max Magnification 0.33X
Autofocus Yes
AF Motor Type Ultrasonic
Full Time Manual Yes
Focus Method Extending front
Focus Distance Limiter No
Distance Scale Yes
DoF Scale No
PHYSICAL SPECS
Weight 585g
Diameter 79mm
Length 102mm
Weather Sealing No
Filter Thread 72mm
Filter Notes -
Hood Supplied Yes
Tripod Collar No
Optional Accessories AM72-01 macro lens (increases magnification to 2X)
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Frequently Asked Questions about Sigma 18-300 F3.5-6.3 DC Macro OS HSM
is the Sigma 18-300 F3.5-6.3 DC Macro OS HSM a Weather-sealed lens?
What is the Minimum Focusing Distance of Sigma 18-300 F3.5-6.3 DC Macro OS HSM
is the Sigma 18-300 F3.5-6.3 DC Macro OS HSM an Autofocus (AF) lens?
What is the Filter Thread Size of Sigma 18-300 F3.5-6.3 DC Macro OS HSM
Does Sigma 18-300 F3.5-6.3 DC Macro OS HSM have Image Stabilization?
Does Sigma 18-300 F3.5-6.3 DC Macro OS HSM have Aperture Ring?
What is the Maximum Magnification Ratio of Sigma 18-300 F3.5-6.3 DC Macro OS HSM


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