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PostPosted: Sat Jan 13, 2007 8:19 am 
Does anyone have this lens already ? Sigma announced it September last year but so far I have not seen any review and so on. I hope someone who is using it now can give me a short review.Thanks.


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PostPosted: Sat Jan 13, 2007 8:22 am 
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Hi Jiangchen, welcome to the Cameralabs forums!

I am keen to test this lens myself, but my local Sigma supplier doesn't have an availability date yet. As soon as I hear anything, I will post on the forum - and of course post a full review as soon as possible!

I have reviewed the older non-OS version, but I don't know how much the optical arrangement or quality will differ.

http://www.cameralabs.com/reviews/Sigma18200mm/

Gordon


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PostPosted: Sat Jan 13, 2007 8:27 am 
Thanks for the fast reply Gordon. I have read through the 18-200mm Sigma before. I will wait for the review in Camera labs.

I heard that this lens will not have AF-S and HSM, just added OS.


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PostPosted: Tue Feb 20, 2007 9:38 pm 
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Yeah, jiangchen,
it seems that HSM is missing. See my information here: http://www.cameralabs.com/forum/viewtopic.php?t=188

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PostPosted: Sat Jun 23, 2007 1:57 pm 
Highly interested in a test.


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PostPosted: Thu Feb 14, 2008 9:14 am 
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Hey Gordon, any word on the availability of a test sample of the Sigma 18-200mm f/3.5-6.3 DC OS AF zoom?

Thank you.

Gordon Laing wrote:
Hi Jiangchen, welcome to the Cameralabs forums!

I am keen to test this lens myself, but my local Sigma supplier doesn't have an availability date yet. As soon as I hear anything, I will post on the forum - and of course post a full review as soon as possible!

I have reviewed the older non-OS version, but I don't know how much the optical arrangement or quality will differ.

http://www.cameralabs.com/reviews/Sigma18200mm/

Gordon


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PostPosted: Thu Feb 14, 2008 9:24 am 
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To be honest, I've not checked for a while, but I was just talking to them about the DP1, so will find out...


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PostPosted: Fri Feb 15, 2008 11:26 pm 
I no longer have the test shots from this lens, but I have used it in London on a 400D. From recollection, IQ wasn't bad at extremes of 18 and 200. OS worked well for 2-3 stops; with good handholding technique you could perhaps stretch it to 4. However the mid focal range was disappointingly soft, even when aperture was stopped down to the f8-11 range. I found the sweet spot to be between f7.1 and 10 depending on which end you're shooting at. As with lenses with a long focal range, it only applies to when focusing at infinity. With closer focal points, the 200 end becomes noticeably shorter, and more like 150. AF speed was adequate. Superzooms aren't really to my liking, but I can see how convenient they can be; essentially my summary would be:

A lens that doesn't do anything particularly well, but what it does, it offers a lot of flexibility - don't expect miracles.

I heard rumours that Sigma are working on an HSM version for the F-mount so that it would work on the D40/x and D60. There is no OS Nikon version of this lens out in London, as far as I've seen, just for the Canon EF-mount.

EDIT: Perhaps my recollection is mistaken - I've looked through other reviews, and at 18mm there is a lot of distortion. I will stand by my comment that at 200mm, there is little distortion though.


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PostPosted: Fri Aug 22, 2008 4:28 pm 
Hello,

I just got the Sigma 18-200 mm DC about a month ago for my Pentax K10D and after a month of using it, I realized today that on the vertical position (shooting pictures straight down) there is lens creep... :( Have any of you noticed this problem on your Sigma lenses? I hadn't read about this issue on the reviews before I bought it... Is this something I should worry about?

I did some test shots... it will do it between 50-80 mm. (if I have it at 50 mm it will slide out to 80 mm)

Let me know, any info will help.

Thanks,

Iguana7


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PostPosted: Fri Sep 12, 2008 5:55 am 
Had this lens for about 3 months now, I have noticed that it does somewhat suffer from lens creep. Also I have a uv filter and a cpl filter for this lens and when taken photos at 18mm I see these dark edges on all four corners of the photo. Maybe a thinner cpl filter might prevent this, i don't know.


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