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Sigma 18-200mm F3.5-6.3 II DC OS HSM

Reviews Views Date of last review
3 28,834 Fri June 28, 2013
Recommended By Average Price Average User Rating
67% of reviewers $250.00 7.33
Sigma 18-200mm F3.5-6.3 II DC OS HSM

The Sigma 18-200mm F3.5-6.3 II DC OS HSM lens is the successor to the original Sigma 18-200mm lens, featuring redesigned optics and HSM autofocus. The Pentax version of this lens does not have an optical stabilizer (despite the name) as it is made redundant by in-body SR.

Lens Construction: 18 Elements in 14 Groups
Angle of View: 76.5-8.1 degrees
Diaphragm Blades: 7
Mininum Aperture: F22
Minimum Focusing Distance: 45 cm
Filter Diameter: 62mm
Maximum Magnifications: 1:3.8
Dimensions (Diameter x Length) 75.3mm x 87.7mm

This lens was succeeded by the 18-200mm "Contemporary" in January, 2014.
Buy Lens: Buy the Sigma 18-200mm F3.5-6.3 II DC OS HSM
Price: $449
Sample Photos: View Sample Photos
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Forum Member

Registered: April, 2012
Location: Belgium
Posts: 71

2 users found this helpful
Lens Review Date: July 14, 2012 I can recommend this lens: Yes | Price: $200.00 | Rating: 8 

Pros: solid,good picture quality,colors,wide focale lengh,compact,good AF
Cons: low contrast, need light
Sharpness: 8    Aberrations: 5    Bokeh: 5    Handling: 8    Value: 8    Autofocus: 7    New Or Used: Used   

This is a good lens if you know its weaknesses. Just close if possible aperture and use it in good light situations.
For the rest, it produces sharp pics from 18 to 200mm.
Inactive Account

Registered: January, 2013
Location: Adelaide, South Australia
Posts: 1
Lens Review Date: January 4, 2013 I can recommend this lens: No | Price: None indicated | Rating: 5 

Pros: price, focal-length range, compact
Cons: softness, image quality
Sharpness: 5    Aberrations: 5    Bokeh: 4    Handling: 7    Value: 6    Autofocus: 7    New Or Used: New   

I bought this lens as a bundle with a K-x because it seemed at the time to be a relatively painless way to get into digital photography without knowing much about equipment. Although it was perfectly easy to use and I had no trouble getting the photos I wanted in most situations, I ended up trading it in for a standard Pentax because I just wasn't happy with the overall image quality - even after extensive manipulations with the latest Lightroom software. Much happier with the Pentax DA 18-55 WR - even despite its reduced focus range - much sharper and better in all facets.
Site Supporter

Registered: July, 2012
Location: Mosquito Creek, Australia
Posts: 3,774

1 user found this helpful
Lens Review Date: June 28, 2013 I can recommend this lens: Yes | Price: $300.00 | Rating: 9 

Pros: Sharp, nice bokeh, handles well, value for money
Cons: None really
Sharpness: 9    Aberrations: 8    Bokeh: 9    Handling: 9    Value: 10    Autofocus: 8    New Or Used: New   

I purchased the Sigma 18-200mm F3.5-6.3 II DC HSM as a general purpose lens for my K-01 which I use under field conditions not conducive to swapping lenses (NOTE: Sigma has now dropped the “OS” on the Pentax mount version). This lens is a new optical formula which bears no relation to the previous two versions. I did some research before deciding on the Sigma. I found two reviews of the OS version which indicated that it is a very sound lens: ePHOTOzine (here) and Popular Photography (here) (Popular Photography gave it “best in class”). The Sigma website also provides some MTF data which suggests the lens should perform well.

Below are some images which have been selected for what they demonstrate rather than any artistic merit. I have previously done a rough comparison of this lens with the SMC Pentax-DA 18-55mm F3.5-5.6 ALII to benchmark performance in the 18-55 range (I did the comparison to help another Forum member get an idea of the Sigma’s performance).The Pentax is well rated in lens reviews on this site. In my view, the Sigma outperformed the Pentax on that test . The comparison images are in my album“Comparison” for those who are interested. My perception from the comparison is that the Sigma has more contrast and appears sharper. The Sigma is acceptably sharp wide open and improves stopped down. Bokeh is good (as demonstrated in the budgerigar image) and CA reasonably well controlled. Aberrations are typical for a lens of this class. Colour rendition and contrast are good. The dingo image demonstrates sharpness at what might be considered portrait length (73 mm). The budgerigar and dingo imagesare 100% crops, 1024x1024 pixels. All images are hand held, jpegs, with no PP.
I think the Sigma would be a good choice as atravel or general purpose lens. It is well constructed and handles easily. Idetected no zoom creep. I am giving it 9 because it produces good images acrossits zoom range and it is value for money.

18mm f10 ISO 100 1/160

18 mm f8 ISO 800 1/50

53mm f8 ISO 100 1/100

Red-necked wallaby (dozing on a cold morning) 200mm f8 ISO 200 1/250

Red-necked wallaby 100% crop (1024x1024)

Dingo 73mm f8 ISO 100 1/160 100% crop

Wild Budgerigars 200mm f9 ISO 100 1/250
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