Sigma 18-200mm f/3.5-6.3 DC OS

leegold

Member
I have the:

Sigma 18-200mm f/3.5-6.3 DC OS Zoom Lens on order. But I'm second guessing myself. I read now the "ex" lenses are sharper. My idea was to have a very sharp lens. But as I read more - zooms w/a wide range are not sharp and "ex" sigma lens are sharper. Maybe this is over generalization...

Photos made w/the lens on the web seem acceptable...

Lee G.
 

laurence2

Well-Known Member
I've been in the same quandary after ordering a lens. :z04_schlaumeier: Actually, the last three orders I CANCELED after the order, so that I could sit back and do more reviewing on the lenses, because there were possibly better versions out there.

Of course, depending on who you ordered it from, you could go ahead and take some shots with the lens, and then return it if it's not what you want.

A tough call either way. Good luck!
 

netzuser

Banned
Actually there seem to be two versions of the 18-200mm f/3.5-6.3 DC OS Zoom Lens on the market.
The older one stops the OS-function after a few seconds,no noise is heard,
and the moving part of the lens seems to stay in a "parkposition" untill the
shutter-button is activated for focussing again.
The newer version has the OS activated all the time,even if the OS-switch is OFF.It looks like the moving elements are held in a 0-position,rather than in
"parking".
The later version also has some problems if used in conjunction with the internal flash.
I own the older version and have had no problems so far.
In comparison to a 28-70mm EX and a 70-200mm EX the 18-200mm f/3.5-6.3 DC OS Zoom Lens behaves quite well.
It is not as sharp as the EXes, but only marginal.
For me the 18-200mm f/3.5-6.3 DC OS Zoom Lens is a good alternative in day-to-day use.
Regards
Uwe
 

Robert.4507

Well-Known Member
Hi,

It is probably a fair generalization to make. The more you try to make a lens do, there is always a comprise. The EX series are the top quality of the Sigma line of lenses. My personal experience: I like the 18-200 that I have and have been very happy with the image quality. And am also very happy with the range of the zoom. My lens came with a kit and I think that if it didn't, I would have purchased it for a walk around lens that is useful for all occasions. The OS that the lens has is also very useful. The lens does spend a lot of time on the camera body. Since the lens goes from wide to adequately long, and has good quality, it is my choice when I go for my nature walks and I don't want to lug several different lens or don't specifically know the subject that I will be shooting.

On the other hand, certain lens perform certain tasks better. Enter EX series. However, I have taken beautiful photos with my 18-200. It does not disappoint.

good luck with your purchase,

Robert
 

wayne2

Member
18-200 OS is a good vacation/hiking lens

I have the:

Sigma 18-200mm f/3.5-6.3 DC OS Zoom Lens on order. But I'm second guessing myself. I read now the "ex" lenses are sharper. My idea was to have a very sharp lens. But as I read more - zooms w/a wide range are not sharp and "ex" sigma lens are sharper. Maybe this is over generalization...

Photos made w/the lens on the web seem acceptable...

Lee G.
At one time, most serious photographers used primes (fixed focal length). The zoom lenses of that era had lots of distortion and were not sharp. Today, the computer generated designs coupled with advances in lens materials and construction have narrowed the gap. Today's zooms are, for the most part, as sharp or sharper than those legacy lenses. Is there a difference between EX and non-EX glass? Yes, but for most, those differences will not be a factor. The 18-200mm DC OS is quite capable of great images and is definitely a good vacation or walk about lens. You can cover the range with a couple of great EX lenses, but they will weigh more and be larger (both of which are not welcome for a family vacation or for hiking/backpacking). For hiking/backpacking, this is my lens of choice, along with the 30mm f/1.4 EX for low light shots or when I want a very shallow DOF. The entire combo is much lighter than my E-3 and the 12-60 plus 50-200 SWD lenses (which is my bad weather outfit and for birds in flight - much faster focusing than the Sigma).

Wayne
 

notalent

Active Member
Is there a difference between EX and non-EX glass? Yes, but for most, those differences will not be a factor.
I too have been wondering about EX lenses. I have a 18-50mm DC, but saw there was also an EX version. Could you elaborate a little on for whom the differences would be a factor?

Thanks!
 

Guest .

Banned
The 18-200 OS DC is sharp as a knife crossover all focal lengthes.

You can use it open aperture with very good image results. It becomes moderately unsharp towards the very edges around 35mm. Just stop down aperture a little and the problem has gone. At 5.6 to 6.3 there is no 35mm problem left.

-Die Katze-.jpg -Entenküken-.JPG

-Eichhörnchen2-.jpg -Sittich-.JPG

-Das doppelte Vogelhaus-.jpg -Der Schönste-.jpg

I like the lens very much. Its OS ability is a dream!
 

Guest .

Banned
.....the eagle is 1/13s !!! @ 200mm focal length freehended! The shot would not have been possible without the OS-function.

-Heiss-kalt-gefährlich-.jpg

See you with nice pictures

Klaus
 

Guest .

Banned
I too have been wondering about EX lenses. I have a 18-50mm DC, but saw there was also an EX version. Could you elaborate a little on for whom the differences would be a factor?

Thanks!
Well,

the 18-50mm DC 3.5-5.6 is always considered low quality. The DP1-lens for example is always considered highest quality..... and it is!

I once compared an SD14 + 18-50 (cheap version without EX!) with a DP1. I had the 18-50 at 4.0 of course and at 18mm.

Sample 2.jpg Sample 5.jpg

CROPS:

Sample 3.jpg Sample 6.jpg

I am not going to tell you which one is the "high quality" DP1-shot and which one is the "lowest quality" 18-50mm shot.

But ... I will give you a tipp .... Both shots are F:4.0 ...1/50s .... ISO100

As it turned out .... the DP1 cheats with 4.0 aperture .... its images are clearly darker than the SD14 + kit-lens results. :)

Do you any longer believe, that the 18-50mm kit-lens is low quality?!

Some more examples:

.....
 

Guest .

Banned
.....

SD14: sample 22.jpg DP1 sample 21.jpg


SD14 CROP from the above: sample 23.JPG

DP1 Crop from the above: sample 19.jpg

Conclusion:

I have SIGMA EX lenses and I have SIGMA NON EX lenses. A lens without this label does not have to be bad at all. The 18-50mm KIT-lens is much more than waste. :) .... as I say and as image results prove.

See you with nice pictures

Klaus
 

Guest .

Banned
Thanks for the flowers! :rolleyes:

I frequently do all possible efforts to illustrate, that image quality can be considerably affordable.
The most expensive equipment does not always mean the most brilliant image results. Dedication is much more important. :)

See you with nice pictures

Klaus
 

jasonh

Well-Known Member
Klaus, you must have a good copy of that lens or something. My 18-200 OS is not nearly that sharp (see note), and I've come to the conclusion that the OS is pretty much useless as even 1/60 shots will come out blurred @200mm.

For general walking around, not knowing what I'm going to shoot, I like the range of the 18-200, and it is generally OK. For serious shooting, I personally wish I had something better.

note: I'm wondering if my lens has a "soft spot" and a "sharp spot." It seems like images taken up to 10ft or so away are pretty good, macros are still good but not as good, and everything else is as soft as a cotton ball.
 

Guest .

Banned
... sharp as a knife .... 18-200mm DC OS @134mm... open aperture F:5.6

-Heuschrecke3-.JPG

... sharp as a knife .... 18-200mm DC OS @ 162mm ..... + macro bellows

-Libelle2-.jpg

Sharp in action .... 18-200mm DC OS at LONDON COVENT GARDEN
154mm / F:8 / ....1/200s ..../ ISO 400

-Künstler1-.JPG


I have got two of the 18-200mm DC OS (one to the hands of my wife!) and the older 18-200 mm DC (NON OS!)

All of them perform best. I guess, I like this lens! :)

See you with nice pictures

Klaus
 

Steaphany

Well-Known Member
Your photos prove your point, that Sigma can design and produce a lens with a wide zoom range. ( > 1:10 )

Being manual/analog photography old fashioned, I was only considering prime lenses and zooms with a < 1:3 zoom range without OS ( that's what tripods are for ;) ), I may have to give something wider a try.
 

wayne2

Member
18-50 EX vs DC

I too have been wondering about EX lenses. I have a 18-50mm DC, but saw there was also an EX version. Could you elaborate a little on for whom the differences would be a factor?

Thanks!
The 18-50 DC lens is an inexpensive kit lens that performs just okay. The EX version is a constant f/2.8 and controls distortion and flare better, has higher contrast, and costs a lot more. Since most users print at smaller sizes (typical 8x10 traditional size), the actual advantage is less (other than low light performance).

As others have shown, the 18-200 OS lens is excellent and can provide very nice enlargements. It is also a great lens for taking shots of insects (you can stand further way than with the shorter macro lenses). Would I trade mine for EX glass? Probably not since that is not the reason I bought the SD14 (it is my light weight travel camera). I did add the 30mm f/1.4 for low light and shallow DOF (and because I prefer natural light over flash).
 

leegold

Member
Klaus's images are sharp. I hope I can get results like that...I haven't stepped-out with the camera/lens yet but this thread is inspiring to me.
 

jasonh

Well-Known Member
Ok, after some experimenting, I think the main thing to keep in consideration with this lens is to use f8-11. Not so soft now :)

lily-4-22-sm.jpg

kitty-4-22-sm2.jpg
 

bashar

New Member
Chromatic Abbreviation: 18-200mm DC vs. 18-200mm DC OS

I have got two of the 18-200mm DC OS (one to the hands of my wife!) and the older 18-200 mm DC (NON OS!)

All of them perform best. I guess, I like this lens! :)

See you with nice pictures

Klaus
Hi Klaus,

I often get CA in sunlight shots from my SD14 with 18-200mm DC throughout the whole zoom range. When the focal length is near 18mm and 200mm, I see CA in almost all shots in bright sunlight (even in indoor shots with built-in flash.)

Does the one you have exhibits similar behavior as well?
I am wondering if I should replace it with the 18-200mm OS version.
Do you think the OS version is better in this regard?

Thanks for your comments in advanced,
Bashar
 
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