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11-29-2013, 12:04 AM   #16
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QuoteOriginally posted by ak_kiwi Quote
I cannot compare the K-30 but I can compare the K5iis against the K3 for you.

Hi Revax,
FWIW personally I would think the K3 with the Tamron would be a good combo for two reasons. Firstly the screw drive seems to be a bit stronger/faster (at least compared to a K5iis) and also the focus tracking of the K3 is vastly superior.
I have the Sigma 70 - 200 and whilst it is a good lens I think the Tamron would be a good match for it on a K3.

There is probably something else you need to consider though. The K3 runs into ISO limitations probably a stop before the K5iis but 3200 can be used on the K3 shooting raw with some post work. (see heavy crop below)

My recommendation? Find a member/shop with a K3, dial in your Tamron , and see what you think. (But keep your K-30 as the second camera for the sports short zoom work)

Cheers Chris
Sorry to crash teh thread but just a quick hello .
I too have a WP playing offspring.


Last edited by awaldram; 05-22-2014 at 04:20 AM.
11-29-2013, 06:52 AM   #17
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I have both lenses and have both the K5 and new K3. When I used the Tamron on my K5 it would just occasionally decide to stop focusing and go off track for some reason. It would take a few seconds to find itself and then start focusing again. This was really driving me nuts especially when your trying to shoot something. I got the Sigma OS in August and haven't used the Tamron since. What a joy it is on the K5. Fast responsive focusing while shooting HS Friday night football!! I wish I had my K3 before the season ended because I wanted to try it out. I'm still selling the Tamron and one of my K5's to fund the purchase of the K3. It's the silent focusing of the Sigma that I love!! I did put the Tamron on the K3 yesterday and found the focusing to be fast and quick like the Sigma. If it wasn't for the silent focusing of the Sigma I probably would be keeping the Tamron. It's a hell of a bargain being $300 less than the Sigma. The image quality is excellent!!!
11-29-2013, 07:36 AM   #18
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QuoteOriginally posted by Petey44 Quote
I have both lenses and have both the K5 and new K3. When I used the Tamron on my K5 it would just occasionally decide to stop focusing and go off track for some reason. It would take a few seconds to find itself and then start focusing again. This was really driving me nuts especially when your trying to shoot something. I got the Sigma OS in August and haven't used the Tamron since. What a joy it is on the K5. Fast responsive focusing while shooting HS Friday night football!! I wish I had my K3 before the season ended because I wanted to try it out. I'm still selling the Tamron and one of my K5's to fund the purchase of the K3. It's the silent focusing of the Sigma that I love!! I did put the Tamron on the K3 yesterday and found the focusing to be fast and quick like the Sigma. If it wasn't for the silent focusing of the Sigma I probably would be keeping the Tamron. It's a hell of a bargain being $300 less than the Sigma. The image quality is excellent!!!
So you feel the K3+Tamron performs just as well as the K3+Sigma? Thanks, this is really helpful.
11-29-2013, 09:00 AM   #19
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QuoteOriginally posted by Petey44 Quote
I did put the Tamron on the K3 yesterday and found the focusing to be fast and quick like the Sigma. If it wasn't for the silent focusing of the Sigma I probably would be keeping the Tamron. It's a hell of a bargain being $300 less than the Sigma. The image quality is excellent!!!
Sold - to the man from California!

11-29-2013, 09:08 AM   #20
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QuoteOriginally posted by awaldram Quote
Sorry to crash teh thread but just a quick hello .
I too have a WP playing offspring.
Nice shot awaldram, what lens was it you were using? Looking at the exif you were running out of options on shutter, aperture and iso - typical tricky conditions for waterpolo
11-30-2013, 06:16 AM   #21
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QuoteOriginally posted by reivax Quote
So you feel the K3+Tamron performs just as well as the K3+Sigma? Thanks, this is really helpful.
Yes, but in the time I was able to play around with it yesterday, it did lose it's focus a couple times and went off track. This verified that it's probably the lens or something I'm doing wrong. The later is not likely because I can't get the Sigma to do it. They both have very responsive focusing and are very quick. Like I said, I liked the performance of the Sigma on my K5. The amount of keepers greatly increased under the lights of a high school football field. I'm going out today with the Sigma and K5 to do some shooting at a local nature preserve. That will be the first hands on with the K3. If I were you, get the Sigma. I was lucky to get it on Amazon back in August for $800. With the sale now , it's still a good price!!
12-02-2013, 08:10 PM   #22
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QuoteOriginally posted by Petey44 Quote
Yes, but in the time I was able to play around with it yesterday, it did lose it's focus a couple times and went off track. This verified that it's probably the lens or something I'm doing wrong. The later is not likely because I can't get the Sigma to do it. They both have very responsive focusing and are very quick. Like I said, I liked the performance of the Sigma on my K5. The amount of keepers greatly increased under the lights of a high school football field. I'm going out today with the Sigma and K5 to do some shooting at a local nature preserve. That will be the first hands on with the K3. If I were you, get the Sigma. I was lucky to get it on Amazon back in August for $800. With the sale now , it's still a good price!!
I went ahead and ordered the Sigma. I'm going to test it out for a few days and I'll keep you guys updated on the results. I hope it's IQ is as good as the Tamron (some sites rate the Tamron higher, some rate the Sigma higher). I guess I'll find out in a few days. Really hoping the autofocus is faster.
01-10-2014, 01:00 AM   #23
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I would like to contribute some technical info to this discussion, I'm struggling (on both the K5 and K3) with my Sigma since day one and last week I finally managed to pin point the problem, check out these links :-)

Theory: What is Focus Shift?
Bokeh Fringing / Longitudinal Chromatic Aberrations (LoCA)
Sigma: Sigma AF 70-200mm f/2.8 EX OS HSM (DX) - Review / Lab Test Report - Analysis
Tamron AF 70-200mm f/2.8 SP Di LD [IF] macro - APS-C Review / Lab Test - Analysis

I hope you find this as interesting as I did!

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