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10-19-2015, 04:23 AM   #1
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Doubt: Sigma 18-200mm DC

Hi there,

My dad has started to use my old KR and he never used DSLR cameras, so at first he wasn't convinced with the idea.
I bought him a Pentax/ Tamron FA 28-200mm silver edition in very good condition (as new) for his nature walks, and his everyday shots. (SMC Pentax-FA 28-200mm F3.8-5.6 AL [IF] Reviews - FA Zoom Lenses - Pentax Lens Reviews & Lens Database)

But yesterday he told me about the Sigma 18-200mm DC (Sigma 18-200mm F3.5-6.3 DC Lens Reviews - Sigma Lenses - Pentax Lens Review Database) and so we are thinking if we should change the 28-200mm for the 18-200mm. A part of the 10mm win below, wich would be helpful, do you guys have any thoughts on that?

Thanks in advice!

10-19-2015, 05:48 AM   #2
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If he likes taking nature walks and wants to take some landscape shots, having 18mm on the wide end will be a big plus. As for the IQ of either lens, I can't help you as I've not used either.
10-19-2015, 05:56 AM   #3
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I assume you mean a Pentax KR - not a Ricoh KR? Just checking ...

For an APS application, the extra 10mm will provide a significantly increased field of view. The image quality between the two lenses will be more similar than different. He will still want to stop down to f/8 - f/11 for sharp images. This lens has been around for a while so there are plenty of reviews.

Sigma 18-200 mm f/3.5-6.3 DC OS review - Introduction - LensTip.com

I've used the FA 28-200mm. It's not a terrible lens and great results are possible if used properly. I made two wonderful 8"x12" prints of my kids with it and I'm totally satisfied with the results. However, the FA lens is big, heavy, and not WR sealed. Since I rarely used the telephoto end of the lens (i.e. 150+ mm) I sold it when I got the DA 18-135mm.
10-19-2015, 07:01 AM   #4
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I had the Sigma 18-200mm and found the colors flat in it compared to the DA 18-250mm; the DA catches a lot of flak, like most superzooms do, but I am entirely happy with it....

10-19-2015, 08:01 AM   #5
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Also worthy of consideration are the 18-250, 18-270, 16-85, 18-135. The 28-200 is a fine lens essentially normal - tele in one package. The 18-200 is a modest wide angle to tele. Another option might be to add a da 12-24 or da 14 or da 15 to his kit.
10-19-2015, 08:36 AM   #6
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My wife had the 18-200 once. It's ok at F8, pretty underwhelming otherwise.
10-19-2015, 10:05 AM   #7
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Have the 18-200 and the Pentax 18-135. The 18-135 IMHO has better iq. If you can sacrifice a little reach I would recommend the 18-135
10-19-2015, 10:21 AM   #8
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QuoteOriginally posted by DogLover Quote
My wife had the 18-200 once. It's ok at F8, pretty underwhelming otherwise.
I agree, set to f/8 in Av mode and it won't disappoint. I chose it over a Sigma 17-70 for my 2009 Sierra hike and I was glad I had the additional reach.


---------- Post added 10-19-15 at 09:22 ----------

QuoteOriginally posted by macman24054 Quote
Have the 18-200 and the Pentax 18-135. The 18-135 IMHO has better iq. If you can sacrifice a little reach I would recommend the 18-135
My copy of the 18-135 definitely had stronger CA above 100mm than the Sigma. I liked the DC a lot - but the newer 18-250 Macro is a better lens though more expensive and bulkier.

10-19-2015, 10:45 AM   #9
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Thank you very much to all of you for your replies
10-19-2015, 11:59 AM   #10
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I have an old Sigma 18-200mm DC. I got a LOT of use out of it (good workhorse).
I did finally upgrade to Pentax DA 18-135mm WR - primarily for the WR and DC-AF
My old Sigma effectively was the first thing I purchased after getting my Red Pentax K-x. After many scratches, bumps, and uses (Alaska fog / drizzle didn't help), I still use it once in a while for places I don't mind having a 'beater' lens.
It worked well for me @ Lake Louise
10-19-2015, 12:18 PM   #11
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Personally I am going to stick my neck out here. I don't think the extra 10mm is enough to warrant changing lenses. Toss an 18-55 in the bag and have him swap lenses a few times while out walking and see if he really finds the extra 10mm important. If he does then decide if carrying a 17-70, 17-50, 16-45, da 12-24, sigma 10-20, sigma 8-16, da 15 or da 14 might just get the job done better.
10-19-2015, 04:38 PM   #12
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Thank you guys,

UncleVanya, deffinitelly if for the money of the 18-200mm I can get all those lenses, then it does not only works for him, but also for me !!
As that would never happen, then we should decide between getting the Sigma or not :-P
10-19-2015, 04:43 PM   #13
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QuoteOriginally posted by red5isalive Quote
Thank you guys,

UncleVanya, deffinitelly if for the money of the 18-200mm I can get all those lenses, then it does not only works for him, but also for me !!
As that would never happen, then we should decide between getting the Sigma or not :-P

LOL - no - but if the 18-200 works to 70 you might add the 55-300 in preparation for future.
10-20-2015, 12:52 AM   #14
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Hahahaha well, I don't think he will get so much passion for photography so easy
11-03-2015, 10:35 AM   #15
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Okay so I finally bought it to my dad. Now we are waiting it to arrive, so I hope it does soon and he can test it soon, and of course, I am hoping that he likes it
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