Sigma 18-50mm EX F2.8


RobE17

Link Posted 16/02/2010 - 16:38
Does anyone have any experience of this lens? I know there is a fair bit on here about the Tamron version but couldn't find out much about the Sigma variety. I know that this is lighter than the DA*16-50 and not as wide and no weather sealing, just after some opinions really

Although I have said to myself that I want to go through the year without buying any more lenses - how long will that last though I wonder??
My Flickr Page

Stu-D

Link Posted 17/02/2010 - 13:43
I was thinking about this lens and the Sigma 17-70. There is a Sigma 17-50 f2.8, but all the sources I found say that the Tamron is better.

My decision as based on:
17-50 is too close to the 18-55 range from my mkII kit lens
I already have the f1.4 FA 50mm lens, so do i need the speed at the 50mm end?
70mm gives a better overlap with my 50-200mm lens
The 17-70 focuses to 20cm (from the sensor) whereas the 17-50 is about 27cm. It doesnt sound like much difference, but (unless I have misunderstood something) guess the difference from the lens front will be the difference between about 2-3 cm and about 9cm, so will feel much better.

However the Sigma 17-70 is being discountinued in its non-optical stabilised version - I think I have got in in time (but dont have the lens yet), so if I was looking now it would be a more difficult decision!

BTW Camera King did have the Tamron for 295 which seemed a pretty good price.

I hope this helps, even though I dont have direct experience of the 17-50.

Stuart

PS I was concerned about focussing issues for the Tamron, replies through this forum put my mind at ease!
K20D | FA 50mm f1.4 | Sigma 17-70mm | DA 18-55mm kit | DA 50-200mm

Stanovich

Link Posted 17/02/2010 - 14:02
There are a couple of (related) earlier threads that discuss this among other lenses, if you haven't seen them already:

https://www.pentaxuser.com/forum/topic/which-lens-would-you-choose--17800 https://www.pentaxuser.com/forum/topic/i-have-died-and-gone-to-heaven-------1793...

I've just been making similar decisions - I have an FA 24-90 which is excellent and I wanted to get something to complement it but with a wider angle. I opted for the Pentax 16-45 over the Sigma or Tamron, using the logic that for its main use (city walkabout) the 2mm wider angle is more useful than an extra f-stop.

Stan
K5IIs & ME Super with FA24-90, DA17-70, DA55-300, misc old primes; Fuji X20.

vjayshutterbug

Link Posted 18/02/2010 - 02:21
I just bought it. Amazing sharpness I think. Fairly compact. Nice build quality. I am loving it! But then, I am comparing it to the Tamron 18-200 which I was using before. I wanted a nice fast sharp lens that felt like it belonged with my K7, and this was it. I say go for it.
Pentax K-5, Tamron 17-50, Tamron 70-300, Metz 50 AF-1 flash, and working on buying more lenses in the future. It never ends.

punt1971

Link Posted 18/02/2010 - 08:44
Stu-D wrote:
BTW Camera King did have the Tamron for 295 which seemed a pretty good price.

I'm looking at buying the Tamron 17-50 very soon so was pleasantly suprised at CameraKings prices. Then I did a bit of digging...

http://www.trustpilot.co.uk/review/www.cameraking.co.uk

http://www.reviewcentre.com/reviews106180.html

I'm not saying don't use them as I have no 1st hand experience. Looking at their reviews I would be a bit warey though!

iceblinker

Link Posted 18/02/2010 - 10:45
Be aware that there have been two versions of the Sigma 18-50m f2.8. The one with "Macro" in the name, apparently, is generally improved.
~Pete

RobE17

Link Posted 18/02/2010 - 21:12
Thanks for all your advice so far, very helpful. Something to think about in the future
My Flickr Page

bychan

Link Posted 20/02/2010 - 00:19
RobE17 wrote:
Does anyone have any experience of this lens? I know there is a fair bit on here about the Tamron version but couldn't find out much about the Sigma variety. I know that this is lighter than the DA*16-50 and not as wide and no weather sealing, just after some opinions really

Although I have said to myself that I want to go through the year without buying any more lenses - how long will that last though I wonder??

Another thumbs up here.
I haven't had it for that long, but so far it cannot be faulted, and is highly recommended.

Regards
Adrian
K5IIs, Sigma 10-20, Pentax DA 16-85, Pentax DA 55-300, Pentax 70 Ltd, Metz 44 AF-2.
Flickr: http://www.flickr.com/photos/ambott/
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