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11-10-2006, 12:27 PM   #1
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Tamron AF 70-300mm f/4-5.6 Di LD Macro or sigma 55-200?

as a second lens until I can afford a better one, which in your opinion is the better one?
both are 199 canadian dollars. likely only be using then in the 125-200mm range.
sharpness and CA are the most important factors as well as low light performance

any opinions welcome

thanks

randy

11-11-2006, 01:19 AM   #2
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Hi Randy, I was in similar dilemma before. I think it is safer to pick a shorter zoom range instead. Image quality is less likely to be compromised with shorter zoom range.

I purchased a sigma 70-200/2.8 (against my current LBA of primes only) just because i could wait for a DFA 200 or 300 next year and it is an impossible search for Fa* 80-200.

Otherwise i would wait for the release of 3 new pentax zooms next year instead: 17-50/2.8 or 50-135/2.8 or 70-300/4-5.6

I owned a canon system as well and almost tried most of sigma series... In the end, I only retained sigma 150/2.8, sigma 30/1.4 and sigma 28/1.8... The rest is out of my system... Compared to my 7 L primes, sigma lacks the vibrant colour ..

I would wait for pentax zooms to be released
11-11-2006, 07:19 AM   #3
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QuoteOriginally posted by slipchuck Quote
as a second lens until I can afford a better one, which in your opinion is the better one?
both are 199 canadian dollars. likely only be using then in the 125-200mm range.
sharpness and CA are the most important factors as well as low light performance

any opinions welcome

thanks

randy
probably the pentax will be better quality. yet, i have the tamron and am quite happy with it (300 mm is nice and i wanted a long zoom, just in case - and it has a useful macro function!). its a very sharp lens and well worth the price. here are some test pics i took with the 70-300 from tamron. for 200mm i have a dedicated a very good smc-m 200/f4.

biggest issue with the tamron: at 300 mm in very contrasty situations (against the sun) you get CA (puple fringing). but if you are aware of this, you can avoid these situations. don't know about the pentax in this respect.

anyway, if you don't want/need 200-300mm, go for the pentax (no macro, but you get quick-shift, which i find useful too).
11-11-2006, 09:10 AM   #4
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why don't you think about DA 50-200. It's a very decent lens! And it's Pentax
here are some of my samples: https://www.pentaxforums.com/forums/post-your-photos/695-pentax-k100d-test.html

11-11-2006, 09:44 AM   #5
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QuoteOriginally posted by kjask Quote
why don't you think about DA 50-200. It's a very decent lens! And it's Pentax
here are some of my samples: https://www.pentaxforums.com/forums/post-your-photos/695-pentax-k100d-test.html
thanks.
the pics look great, but when I tried out this lens in the camera store, the autofocus really dissapointed me.
the K100 with the standard kit lens focused fast, and when I put on the 50-200 it didn't.
with the 50-200 I clicked the shutter about 10 times, only about 3 where as fast as the shorter lens, 4 where a second or so longer, one didn't reach focus at all, and 2 focused but the in the preview it was completely blurry. not just a bit blurry, but so blurry I couldn't even recognize anything in the preview.
I guess I could blame it on the room lighting, but I clicked about 50 with the 18-55 and although there was a fraction of a second lag, it didn't skip a beat overall.

could it have been just THAT lens and not all the 50-200's?

thanks

Last edited by slip; 11-11-2006 at 10:00 AM.
11-11-2006, 10:13 AM   #6
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QuoteOriginally posted by slipchuck Quote
thanks.
with the 50-200 I clicked the shutter about 10 times,
could it have been just THAT lens and not all the 50-200's?
oh, i didn't read that you are considering the SIGMA. the pentax 50-200 is regarded as better in all pentax discussion forums. that is why i wrote "go for the pentax if you don't need 300mm". BTW the australians - due to the australian pentax agent - get the pentax DSLRs bundled with the sigmas, and they are all unhappy about this.
when testing a lens in a shop, i usually go outside to have daylight (esp. with a rather slow ultra-zoom).
i am curious how you will decide! please keep us updated!
regards,
stern
11-11-2006, 10:18 AM   #7
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I didn't notice any such problems with this lens but I've been shooting with it just one day in good light conditions.
I think you should always ask for another lens if you have such problems.. I believe it couldn't be so bad - although it is not perfect, I know... But it's not expensive, it's not heavy and makes very good pics...
11-12-2006, 09:15 PM   #8
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I don't currently have pentax (waiting till after Xmas to get the K100) but do have the tamron 70-300 for Nikon and am very unhappy with it. THe CA is awful and it is only sharp at f10-13. Focussing is slow compared to my other lenses. The contrast is poor and the colors lack snap. Did I mention that I didn't like the lens. It was cheap though...

When I get my K100D I will probably get the Pentax, it seems to get far better reviews.

Here are some sample images with the 70-300










Last edited by arbutusq; 11-13-2006 at 10:06 AM. Reason: Imaes wouldn't show.
11-13-2006, 04:57 AM   #9
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