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Sigma 18-200mm F3.5-6.3 DC

Reviews Views Date of last review
18 59,696 Tue July 28, 2020
Recommended By Average Price Average User Rating
89% of reviewers $201.69 8.17
Sigma 18-200mm F3.5-6.3 DC

Weight: 405g / 14.4 oz
Length: 78.1mm/3.1 in
Filter Diameter: 62mm
Min. Focus: 45cm / 17.7 in
Max. Magnification: 1:4.4
Diagonal FOV:
Horizontal FOV: NA
Horizontal FOV on Digital: 69.3 - 7.1 degrees
Min. Aperture: F22
Optical Construction: 15 Elements in 13 Groups
Buy Lens: Buy the Sigma 18-200mm F3.5-6.3 DC
Price: $279
Mount Type:
Price History:

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Sort Reviews by: Date | Author | Rating | Recommendation | Likes (Descending) Showing Reviews 1-15 of 18
New Member

Registered: April, 2019
Location: Oxford
Posts: 5
Lens Review Date: July 28, 2020 I can recommend this lens: Yes | Price: $50.00 | Rating: 7 

Pros: Compact and versatile
Cons: Sharpness doesn't hold up well on hi-res sensors
Sharpness: 6    Aberrations: 9    Bokeh: 6    Handling: 8    Value: 9    Camera Used: K-10D, KP    Autofocus: 8    New Or Used: Used   

Having lost many good shots over the years while in the act of changing lenses, the appeal of an "all-in-one" super zoom is not lost on me. So when this Sigma appeared on a well known internet auction site at a very reasonable price, I couldn't resist making an offer.

I took it out for a fairly relaxed walk by the river mounted on my K10D, with an FA 50 f1.4 as a reference lens to make some side-by-side tests. At first I was a little disappointed that the lens seemed to lack contrast, but once I removed the UV filter that it came with the situation improved dramatically, it was like looking through a different optic.

I set the ISO to 100 (the K10D's sweet spot), so mostly I was shooting wide open or 1-2 stops closed down. Sharpness and contrast are not in the same league as the FA50 as to be expected, but it has perfectly acceptable resolving power on the K10D's 10MP sensor. Transferred to the much higher resolution KP (24MP) a further round of testing showed that the lens does show its limitations when viewing files at 100%. This is not a lens to use if you are planning on making big enlargements. (To get the best results on a hi-res APS-C camera my advice would be to set aperture priority mode at f8-11 or dial in a moderately high range ISO 400-800 and set the program line to prioritise depth of field.)

Having said that in other respects this is optically very impressive. CA is very well controlled and only very faintly noticeable. Distortion is well controlled and vignetting is not a big problem either. In any case the lens has a profile in Lightroom which can quickly correct these aberrations.

The best thing about it is the relative freedom it gives the photographer, you can see a shot, frame it and shoot it without having to hunt in your bag for the right lens. It makes for a great walk around companion.

Very little chromatic aberration on the borders between the swan's neck and the dark water behind.

Punts moored at the Cherwell Boathouse. Acceptable but not stellar sharpness at 75mm f8

Black and white study of log pile. Shot at 18mm f6.7. There is enough center sharpness and contrast to work with in Lightroom

The Victoria Arms pub. Taken at the long end (200 mm) wide open. Sharpness in the center is pretty good, but falls off at the edges.
Site Supporter

Registered: December, 2017
Posts: 425
Lens Review Date: June 1, 2020 I can recommend this lens: Yes | Price: None indicated | Rating: 8 

Pros: Weight and range
Cons: none
Sharpness: 8    Aberrations: 7    Bokeh: 8    Handling: 9    Value: 8    Camera Used: K10d    Autofocus: 7    New Or Used: Used   

Never thought I would see the day that I realy like a zoom lens and even one with this large focal range.
I am positively surprised with this Sigma lens. Handling is great, the range more than I thought was possible with excellent IQ.

I can't give an indication of the price I paid for it. The lens came as a bonus with the K10d body I was after.
It cured me from my aversion of zoom lenses. I use the lens quite often. It is glued to the K10d it came with. That says how well I like this little giant.
Veteran Member

Registered: October, 2016
Posts: 318

1 user found this helpful
Lens Review Date: May 20, 2020 I can recommend this lens: Yes | Price: $110.00 | Rating: 8 

Pros: relatively light, sharp, great walkaround lens
Cons: The zoom ring works opposite of most zoom lenses
Sharpness: 9    Aberrations: 8    Bokeh: 8    Handling: 6    Value: 10    Camera Used: K-50    Autofocus: 8    New Or Used: Used   

I really like this lens because of the zoom range. So far it has performed very well and is quite sharp especially on a tripod
New Member

Registered: February, 2017
Location: Plymouth, Devon. UK
Posts: 3

1 user found this helpful
Lens Review Date: October 2, 2017 I can recommend this lens: Yes | Price: $60.00 | Rating: 10 

Pros: Feels well built and is a light weight replacement for several lenses

I am an out and out amateur lens reviewer. Most of my pictures end up on the lap top and do I not have Photoshop.

I was getting a bit fed up carrying a bag of lenses and a spare body so I have got rid of all my lenses bar a 50mm F1.8 DA and have replaced the spare body with a LumixTZ55 compact fitted with a 24-480 zoom. The compact is on my belt all the time and has begun to prove very useful.
However I have also purchased a Sigma 18-200 DC recently for 60 dollars and have found that this lens covers all my DSLR needs particularly for special times like air and motor shows. It is not bad at portraits as well but the 50mm is the best out of the two for that. The Sigma really is an excellent walk around lens although I understand there have been two further versions since the original.

If you are looking for a budget do-it-all lens then this might well be the one to look out for. It is the one with the red stripe.
Site Supporter

Registered: October, 2016
Posts: 171

2 users found this helpful
Lens Review Date: February 13, 2017 I can recommend this lens: Yes | Price: $100.00 | Rating: 9 

Pros: Light, Focal Range, Sharp in most situations, Good AF
Cons: Contrast can be a bit lacking
Sharpness: 8    Aberrations: 7    Bokeh: 7    Handling: 9    Value: 9    Camera Used: K-S2    Autofocus: 9    New Or Used: 9   

I was looking for a budget lens that had a longer reach than my 18-50mm Kit lens and would be as sharp if not sharper. Based on the reviews here I decided to give it a try. So far I am very pleased as this lens and it has earned the role of default lens that stays on my camera when I am shooting family events or not using one of my specialized lens.

Sharpness - Stopped down to F8 this lens produces very sharp images. I gave it an 8 but really it is more of an 8.5.

Handling - It is just the right weight and the autofocus is reasonably fast on my K-S2.

Color - Not as vibrant as some of my older Pentax glass but by no means washed out.

Contrast - My largest complaint is I sometimes need to boost the contrast in post processing.

Bokeh - Not nearly as good as some of my manual 50mm primes but palatable.

Aberrations - I only CA and fringing I have seen is in a couple of high contrast tree shots at 200mm

Overall - I have taken some really nice shots of my granddaughter which was one of my main uses for this lens. I give this lens an overall score of 8.5.

Site Supporter

Registered: October, 2009
Location: Central Florida
Posts: 238

2 users found this helpful
Lens Review Date: December 21, 2015 I can recommend this lens: Yes | Price: $120.00 | Rating: 9 

Pros: wide focal range, sharpness, contrast
Cons: some distortion at the very wide end
Sharpness: 9    Aberrations: 7    Bokeh: 5    Handling: 10    Value: 10    Camera Used: K-5 IIs    Autofocus: 9   

I bought this lens for a week's vacation on the Rhine last summer. I was planning on traveling light, so I took it and a Sigma 10-20. It turned out I didn't need the 10-20, with which I made four interior shots that I could have covered with the short end of the 18-200. This lens is light, sharp, and low in abberration, and its AF compares well with most Pentax screw-drive AF lenses I've used. I highly recommend it as a travel lens when the aim is to get the most punch into the smallest package.

Samples from the wide and long ends of the lens:

Skylight by Noel Parsons, on Flickr

Stolzenfels Castle by Noel Parsons, on Flickr
Forum Member

Registered: August, 2011
Location: Slovenia
Posts: 73
Lens Review Date: February 21, 2014 I can recommend this lens: No | Price: $200.00 | Rating: 7 

Pros: Range, colours
Cons: Slow AF, soft, distortion
Sharpness: 6    Aberrations: 8    Bokeh: 6    Handling: 8    Value: 8    Camera Used: K200D   

Sometimes the allure of a all-in-one lens is just too strong, but in the end you regret nothing when selling the lens. The range is very good and the colours are rich and saturated, but the main reasons for selling were the lack of sharpness even when stopped down and very heavy distortion and weird, almost swirling bokeh like abberation at 200mm and near the minimal focus distance. Maybe my copy was defective, didn't bother to try another one.
Junior Member

Registered: February, 2013
Location: Ontario
Posts: 54

1 user found this helpful
Lens Review Date: January 14, 2014 I can recommend this lens: Yes | Price: $420.00 | Rating: 9 

Pros: Range, Sharpness, Bokeh
Sharpness: 9    Aberrations: 10    Bokeh: 9    Handling: 10    Value: 9   

This lens is underrated. For 8x10 prints and smaller this lens is perfectly fine.
Veteran Member

Registered: October, 2013
Location: Ontario
Posts: 726

2 users found this helpful
Lens Review Date: October 22, 2013 I can recommend this lens: Yes | Price: $250.00 | Rating: 8 

Pros: Nice all around, compact, built quality, IQ
Cons: Slow
Sharpness: 9    Aberrations: 8    Bokeh: 7    Handling: 9    Value: 9   

This is my second favourite zoom lens (following it's brother the 17-70). If it is nice outdoor, this lens is on one of my cameras.

It's a utility lens, it does decent wide shot (18mm) and has a decent zoom range (200mm). Take it down a few stops and this thing is decently sharp and any range.

Aberration/distortion are minimal considering the range. It does tend to fringe a bit at longer range but it can easily be fixed in post.

Bokeh is it's major drawback, it's not ugly but it could be much better.

Handling is great, the lens is solid, zoom ring is nicely weighed (but creeps if held down), built quality is top notch. I wish the focus ring had a bit more travel when focussing manually (like most AF lens).

It's a great all-around lens if you want to travel light and still be able to take decent shots of pretty much anything life throws your way. It's not particularly great at anything but it does a very good job at being versatile.
Veteran Member

Registered: June, 2011
Location: Near Sydney, NSW
Posts: 331

2 users found this helpful
Lens Review Date: April 8, 2013 I can recommend this lens: Yes | Price: $390.00 | Rating: 10 

Pros: Basically the best superzoom I've come across
Cons: Superzooms are always superzooms
Sharpness: 10    Aberrations: 9    Bokeh: 10    Handling: 10    Value: 10   

In the pros I said -BASICALLY the best superzoom I've come across because I have had the pleasure of using the Sigma 50-500mm, which is incredible, but that's a pretty special piece of glass, and costs $1800 or something.

I should note that I have not used the Pentax/Tamron 18-250 or 18-270 - they could well be better but to be honest, I'd be surprised, because this thing is damn impressive.
It's sharp at just about all settings, but more importantly, the results are just quite pleasing. I owned the 17-70 f2.8 - 4.5 as well, and although it's supposedly technically 'better', I just never liked it. This lens just has that X factor... and 11x zoom is never a bad thing to have.

In the end I don't actually need lenses like this because I have pro level stuff (the 50-135 for one), that will of course do a better job - but I'm always sad to sell these lenses that have impressed me in their time with me.
New Member

Registered: November, 2012
Posts: 5

1 user found this helpful
Lens Review Date: January 3, 2013 I can recommend this lens: Yes | Price: $195.00 | Rating: 9 

Pros: Sharp and versatile
Cons: Focus
Sharpness: 9    Aberrations: 9    Bokeh: 8    Handling: 8    Value: 10   

I was surprise with this lens being better than the reviews that it has received, so I think its a highly underrated lens. Its sharp and takes good macro shots too. It handles quite well but I do miss the quick shift features of other Pentax lenses. But for value and performance, its really hard to beat.
Veteran Member

Registered: January, 2011
Location: Minahasa, North Celebes (Sulawesi)
Posts: 585
Lens Review Date: June 26, 2012 I can recommend this lens: Yes | Price: $255.00 | Rating: 9 

Pros: All-Round-ness, Relatively faster AF
Cons: No aperture ring, Body paint wears
Sharpness: 8    Aberrations: 8    Bokeh: 9    Handling: 9    Value: 10   

I have two versions of 28-300 and they serve me well, but lately I've found myself back to shooting landscapes. 28mm is not that wide. So I get this lens, problem solved. Paired with K20D, I can still crop images to mimic the reach of 300mm. Quality is not that bad, really, I did not expect much from zooms, but this lens seems to better than the 18-55 kit in my eyes. Colors, sharpness, and bokeh is good, I have no complaints. I've seen a site that compared this with the Tamron's version, this Sigma appeared sharper. I'm also under an impression that this lens gives wider than just 18mm, but I could be wrong. For those who wanted an all-rounder, casual-shooting glass, did not want to lost the wider end, still need a lot of reach, yet did not want to invest pretty penny into 18-250, this thing here is the best choice.

Sample photos:

Site Supporter

Registered: April, 2011
Location: Lost in translation ...
Posts: 17,938
Lens Review Date: August 3, 2011 I can recommend this lens: Yes | Price: $225.00 | Rating: 7 

Pros: Zoom range, zoom lock, convenient
Cons: Lack of sharpness, focus hunt, no aperture ring


This is my oldest Sigma, and it's a good overall performer ... doesn't do anything really "bad", nor does it do anything really well either. I purchased it to have more top end as compared to the kit lens (DA 18-55mm AL "I") which came with my K110D. I have also used this lens on my later DSLR's.

The zoom range is convenient as a "walk around" lens with a good weight and feel. The zoom lock is nice and one can make this lens relatively "sharp", but you really have to work with it under the right conditions given how slow this lens is. Focus hunt can happen, but one shouldn't get too picky for an entry-level Sigma lens like this one. Basically, no huge gripes here, but no laurels either ...

What bothers me the most is the lack of overall sharpness, but I have never been convinced that WIDE range zoom of this type can be every good. I have also chatted with my friendly local (French) camera store guy and he stated that if I think that this zoom range is not adequately sharp for my tastes, then definitely do not get an even wider zoom range, like a 18-250mm ... (or maybe a Tamron 18-270mm, even though it is not in a K-mount version). All the same, I would like to try one like this just to compare the results.

Allez, salut et bonne journée, Jean le Frog
New Member

Registered: January, 2011
Location: Michigan (Summer); Florida(Winter)
Posts: 6

2 users found this helpful
Lens Review Date: February 27, 2011 I can recommend this lens: Yes | Price: $135.00 | Rating: 9 

Pros: Light weight, zoom range, good autofocus, zoom lock
Cons: focus hunts occasionally

Bought this as a walk-around lens for vacations and everyday shooting. Nice weight and zoom range. Autofocus hunts sometimes. Often shoot full manual including focus. Found to produce sharp pictures in daylight even if overcast. Very happy with this performance.
Veteran Member

Registered: December, 2010
Location: SoCal
Posts: 517

1 user found this helpful
Lens Review Date: December 31, 2010 I can recommend this lens: Yes | Price: $249.00 | Rating: 7 

Pros: convenience, compact, all-in-one, zoom, affordable
Cons: slow, AF hunt, dust magnet, CA

This is a generic 'all in one' lens - kinda of like having a vehicle that's a cross over.
Don't expect it to be a car, a minivan and and SUV... it makes some sacrifices.

- It can take some decent shots and 'can' be sharp... just not so much at the edges
- Its fairly lightweight, yet feels pretty sturdy (feels almost 2x as heavy as the kit 18-55mm)
- 18-200mm is a very good range
- No zoom creep (yet)
- Its $249 - unless you're wanting a shorter zoom (50-200mm Pentax or 70-300 Tamron/Sigma), you're going to pay at least this much.
- Great for travel - no swapping of lenses

- Fringes are not so great on focus
- Not the sharpest lens out there
- slow
- AF hunt - with moving objects you might as well take off AF.
- CA

Verdict: It came down to this or Pentax 55-300. I don't think I really need the long end 'that far', but I would appreciate the 4-5.6 of the Pentax vs 3.5-6.3 of the Sigma. This is essentially a 'poor mans' / entry level version of Pentax 18-135mm.
I'll probably use this as my 'main' outdoor lens. I have taken +5000 pictures on my 18-55mm kit since September, but I've been needing a little more reach, and the 18-135mm Pentax is out of my price range.
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