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Old 12-03-2007, 04:40 PM
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That's not a lens ... THIS is a lens!

http://www.dpreview.com/news/0703/07...ma200500mm.asp
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Old 12-03-2007, 05:24 PM
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Yeah, that an impressive looking piece of glass. Back in the day Sigma had a reputation for cheap 'n' nasty lenses, they seem to have come a long way.

Last edited by mickoking; 12-03-2007 at 06:59 PM.
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Old 12-03-2007, 05:53 PM
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There was a big discussion on this lens on the digital_astro group. as you might expect many are skeptical on its performance under the stars, from what I have read, I don't think it would work too well.
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Old 12-03-2007, 06:24 PM
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i think it's more a technical demonstration rather than anything else to try and show them as a serious player.
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Old 12-03-2007, 06:57 PM
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I owned a Sigma lens back in the late 80's. It was a 28mm fixed lens. Needless to say the images were somewhat 'soft' and the lens after about a year failed to function at all. I replaced it with a Canon lens and I have it to this day.
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Old 12-03-2007, 07:12 PM
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they seem to have some QC concerns.

i.e. they have some lenses that are great - the 120-200/2.8, the 300-800mm, their 70-200/2.8 and 300/2.8 & 500/4.5 are all very very good - but the problem is you often need to try a couple of samples before you find a good one.
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Old 13-03-2007, 04:21 AM
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Quote:
Originally Posted by Astroman View Post
There was a big discussion on this lens on the digital_astro group. as you might expect many are skeptical on its performance under the stars, from what I have read, I don't think it would work too well.
I dont see why it wouldnt work to well, being skeptical is one thing, but trying it is totaly different.
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Old 13-03-2007, 06:23 AM
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that not a lens its a telescope !!!!!!!
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Old 15-03-2007, 07:56 AM
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Tamron had a similar reputation years ago, and for all I know they still might. I guess that if Sigma start to earn a reputation they might start earning enough to invest some quality in their products.
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Old 15-03-2007, 10:54 AM
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Wow, you cause some serious damage with that. I'll bet it will cost a kidney as well.

Cheers
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Old 15-03-2007, 10:59 AM
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I have one sigma zoom for Practica (28-150, f3.5)
I paid $15 for it on ebay and it was not worth the money.
"Soft" image is a soft word for what it does......
Of course, this may be an exception... but who will risk and try it? :-)
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Old 17-03-2007, 08:48 PM
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Yes Canon eats Sigma for quality, I own a Sigma 28-300, at 300 its okay, at 28 its totally unusable, soft all over, and the autofocus cant handle blue on green, as I found out when at a Newcastle Knights game, the blue and red uniforms against green grass threw the AF big time.
Scott
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Old 17-03-2007, 08:56 PM
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scott - that really means nothing. Any 28-300 lens will be a bucket of junk, and it doesn't mean their better glass is not any good.
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Old 17-03-2007, 08:57 PM
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The best zoom lens I ever used was back in the days of film. Nikkor 50-300mm zoom, cant remember its f number but It was bloody fast judging from its diameter. The image's were pin sharp as good as any fixed lens I've used.
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Old 18-03-2007, 08:14 PM
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mick that would be the 50-300mm f/4.5 lens, made in the late 1960's. Impressive for it's day, but modern pro level zooms will outdo it though I don't doubt you got good results from it, it was a technical showpiece for nikon.
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Old 18-03-2007, 09:32 PM
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The quality of zooms are so much better these days...

Primes still beats zooms by a longshot in my opinion, the primes these days, they blow me away...
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