First from the Sigma 17-50 OS HSM

dougf8
Posted 18/02/2011 - 05:18 Link
Cheers K10d, So £100 more and "it is optically worse and more expensive than the Sigma." any confirmations?
Lurking is shirking.!
Edited by dougf8: 18/02/2011 - 05:18
K10D
Posted 18/02/2011 - 05:46 Link
dougf8 wrote:
Cheers K10d, So £100 more and "it is optically worse and more expensive than the Sigma." any confirmations?
Bare in mind I have the 16-50 SDM (although its away for repair).

link

He is not happy with it.

from Photozone:

"Verdict
It is difficult to find a final verdict for the Pentax SMC DA* 16-50mm f/2.8 ED [IF] SDM. On the one hand it has some obvious problems like a weak border performance at max. aperture and very pronounced lateral chromatic aberrations (CAs). On the other hand it is really very sharp and contrasty at medium aperture settings (f/5.6- and many users may actually forgive the border problems at f/2.8 because you either stop down for conventional photography or rely on the (very sharp) center for shallow depth-of-field situations (e.g. portraits) anyway. The build quality of the lens is also a step up from the consumer grade Pentax lenses and the silent (although not overly speedy) SDM is an extra bonus on top. The pricing of the Pentax 16-50mm f/2.8 is fair relative to its performance and build quality".

I didn't really use mine too much to say it's a great lens or to say it has faults. Focus was slow on my K10 and I thought it a little better on my K7. No doubt faster still on a K5. The range of the lens was what drew me to it.

This Sigma is impressive and fast focus on my K7, much faster than my 16-50 SDM.

I'll be out over this weekend and give it some use in strong sunlight (inc. direct sun in frame), so I'll get a more realistic idea of how it stands up to real day to day work.

This also from this forum (before I joined).
link

Best regards
Too far from a shore.
Edited by K10D: 18/02/2011 - 06:04
dougf8
Posted 18/02/2011 - 06:03 Link
I think the less you read, and less you know, the easier the choices get. Ignorance is bliss.

However, another cheer for the kit lens.

I guess the Sigma is not WR.

To be fair, the review is 2 years old and he references that he may have had a poor copy. But with the recent K-5 issues Pentax QC needs taking to the next level.
Lurking is shirking.!
K10D
Posted 18/02/2011 - 06:07 Link
dougf8 wrote:
I think the less you read, and less you know, the easier the choices get. Ignorance is bliss.

However, another cheer for the kit lens.

I guess the Sigma is not WR.

To be fair, the review is 2 years old and he references that he may have had a poor copy. But with the recent K-5 issues Pentax QC needs taking to the next level.
Sigma is not WR but to be honest, I tend not to live and work where it rains much. Its 38'C outside with an all blue sky.

Best regards
Too far from a shore.
dougf8
Posted 18/02/2011 - 06:11 Link
K10D wrote:
dougf8 wrote:
I think the less you read, and less you know, the easier the choices get. Ignorance is bliss.

However, another cheer for the kit lens.

I guess the Sigma is not WR.

To be fair, the review is 2 years old and he references that he may have had a poor copy. But with the recent K-5 issues Pentax QC needs taking to the next level.
Sigma is not WR but to be honest, I tend not to live and work where it rains much. Its 38'C outside with an all blue sky.

Best regards
So do I, Cornwall .... ...stop laughing at the back. Just need to shift that Jet stream back into place and I'll be happy.

Yes the number of times a year I need WR can be counted on the fingers of one finger.
Lurking is shirking.!

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