Sigma 18-200mm f/3.5-6.3 DC Macro HSM Lens for Pentax DSLR's


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About Sigma 18-200mm

The Sigma 18-200mm lens was designed for APS-C sensors and features a new matte black finish, thermally stable composite material in its construction and smaller and lighter design then previous models. With exceptional performance, this 18-200mm camera lens does not sacrifice image quality for versatility. Having the ability to shoot from wide angle to telephoto is highly useful particularly for travel photography, landscape photography, street photography, portrait photography and nature photography.

An improved minimum focusing distance of 14.7 inches paired with the use of Special Low Dispersion glass, the 18-200mm excels at bringing out great detail in close-up photography as well. A Hyper Sonic Motor (HSM) ensures quiet, accurate and fast autofocus and an optical Stabilizer (OS) helps compensate for camera shake. Make this lens your All-in-One lens to handle any shooting scenario.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Lightweight (4),Easily interchangeable (3),Fast / accurate auto-focus (3)
Best Uses:
Landscape/scenery (4)
Reviewer Profile:
Photo enthusiast (3)

Sigma 18-200mm Features

  • Now Lighter & Smaller
  • Great for Close Up Photography
  • A New Standard up to 200mm

Sigma 18-200mm Specifications

Canon EOS Cameras
Lens Construction
18 Elements in 13 Groups
Angle of View (for SD1)
76.5-8.1 degrees
Number of blades
7 Blades (Rounded Diaphragm)
Minimum Aperture (Wide)
Minimum Focusing Distance
Maximum Magnification
Dimensions (W x H)
70.7mm x 86mm/2.8in. x 3.4in.
430g (15.2oz.)

Sigma 18-200mm Reviews

Review Snapshot®


(based on 8 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 8 customers


Good value for the cost


from Hendersonville, NC  -  Photo Enthusiast

I use the lens as my 'normal' lens; it's the one always on my Canon7D. Focus is sharp and the IS function works well. It's lighter than my old 10-200 with a filer size of 62mm vs 72mm. So far, I'm pleased with it (only used it for a month).

(1 of 1 customers found this review helpful)


I liked it!


from Rio de Janeiro

Very practical for travel, children and, in my case (I have two wide angles), using it as telephoto. The lens is very well built, but the focus ring is a little loose. Sharpness is pretty good if you stop down, but wide open could be better. See below two images (@100%): i) center (@200mm) and ii) extreme corner (@200mm).

(5 of 5 customers found this review helpful)


Sigma 18-200 Performs Well


from Madison WI

I received the newly released "Sigma 18-200mm F3.5-6.3 DC OS HSM" lens a couple of days ago and my initial tests have been quite impressive! I have only had a chance to do a quick direct comparison of the Sigma 18-200mm lens to the "Canon ef-s 55-250mm f/4-5.6 is ii" lens that came with my Canon SL1 DSLR. So far, the Sigma zoom lens appears to be noticeably sharper than the Canon zoom lens. I also think that the Sigma rendered colors that are more vibrant and have better saturation. The Sigma focus is very quiet, fast, accurate and does not "hunt" as much as the Canon lens does in tough situations (like lots of detail and low light). The Canon zoom lens tends to hunt for focus on busy objects, such as berries on a tree. As a result, the Canon lens keeps trying to lock the focus and takes a longer time doing so. The Sigma locked focus easily and didn't "hunt" as often or as long. The Sigma lens is much heavier than the Canon, but that is to be expected since the Canon is mostly plastic. The Sigma lens has a solid quality feel. Lens weight is something that should be considered when deciding on purchasing any lens. One of my favorite test subjects is my solid gray cat. I like using him as a photo subject because of his dark coloring and fine details. The Sigma handled his coloring quite well with a perfect exposure that impressively detailed his slight color differences. Under the same indoor natural-light conditions, the Canon zoom did not capture his subtle color differences as well, and as a result, his color was more uniform and muted. Don't get me wrong, the Canon photos were still very good, but the Sigma photos were excellent. Fine detail such as whiskers and fur were razor sharp with the Sigma and slightly less sharp with the Canon. I also took a series of outdoor photos where the subject had lots of detail that included light and dark areas. Light/Dark edge transitions are commonly subject to a chromatic aberration known as "purple fringe". Photos taken using the Canon 18-250mm lens had very visible "purple fringe". The Sigma 18-200mm did not show any (at least not obvious) "purple fringe". The Sigma has lots of positives, but there are a couple annoyances so far. The first one is that the zoom ring is not as smooth as I would expect. It tends to bind a little bit between 80mm - 130mm. That might loosen up eventually, but I still plan on talking to Sigma about it. The other comment is that the Sigma lens feels kind of "rough" while being mounted on the camera. It almost feels like you are forcing the lens on the camera when twisting the barrel. The Canon lenses mount extremely smooth. This is not a big deal, especially since I will rarely be taking the lens off of the camera. Overall, the Sigma 18-200mm lens is a well-made, high quality and affordable all-purpose lens. Very impressed with it so far. I will post updates if there is anything significant to add to the review.


weighed, measured, came up lacking


from Morrilton, AR  -  Semi-pro Photographer

I had higher hopes for this lens. The Sigma 17-70 is in my bag and is leaps and bounds better than this lens. The clarity just isn't there and I have to push my ISO in order to get the image. If it's not too late, I'm returning this lens and will do more research and save my dollars to afford a quality lens.


Saves from carrying lots of lenses


from Newport,TN  -  Casual Photographer

Used it from graduation. Great for finding who you want to take pictures of.


switched from tamron 18-270 to this one


from St :Louis MO  -  Photo Enthusiast

the price was right, and since I like to keep it to one lens when I travel , this makes a lighter , less bulky package of my canon rebel, without losing much telephoto , etc.

(1 of 2 customers found this review helpful)


Excellent travel lens for the money


from Louisville, KY  -  Casual Photographer

This is my first non-canon lens. I am using it with T3i The Good - Solid build. Compact and Lightweight. Fast, accurate, and reasonably quite Auto Focus. Good IQ for the price. Zoom Range (29 - 320 for T3i) Outdoor closeups are great, it gives smooth background blur @200mm. The Bad - It creeps. It can be locked only at 18mm. Some stickiness in zoom mechanism at mid-range. F6.3 is a minor issue, It affects only if you are shooting in poor light with above 80mm zoom and Evaluative metering. Overall - Nice travel/walk-around lens.

(2 of 2 customers found this review helpful)


Good carry lens


from Socorro, New Mexico  -  Photo Enthusiast

Designed exclusively for smaller APS-c size sensors A little soft at high end but all 18-200 lens share this problem. Wife uses this on her Canon 60d.

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