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05-21-2019, 03:49 AM   #1
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Tamron 70-300mm vs Sigma

Hello guys,
I am willing to get a 70-300mm lens and have to decide between Tamron and Sigma
Tamron AF 70-300mm 4-5,6
Sigma 70-300 mm F4,0-5,6

Any experience/remarks?

05-21-2019, 04:11 AM - 1 Like   #2
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Is it for use on a FF or APS-C camera? If for APS-C, any of the Pentax DA 55-300 lenses would be a big step up in quality from the Sigma and Tamron. Neither get much love in the PF user reviews.
05-21-2019, 04:12 AM   #3
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QuoteOriginally posted by Paul the Sunman Quote
Is it for use on a FF or APS-C camera? If for APS-C, any of the Pentax DA 55-300 lenses would be a big step up in quality from the Sigma and Tamron. Neither get much love in the PF user reviews.
thank you for poiting out.
I have a K-5 and yes I am considering the DAL 55-300mm as well because it seems to be lighter-
05-21-2019, 04:24 AM - 1 Like   #4
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QuoteOriginally posted by dekao Quote
thank you for poiting out.
I have a K-5 and yes I am considering the DAL 55-300mm as well because it seems to be lighter-
The DA or DAL versions are optically identical, but the DAL lacks quick-shift and has a plastic bayonet. Do not buy the DA 55-300 PLM, as it won't work on the K5.

05-21-2019, 04:38 AM   #5
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QuoteOriginally posted by Paul the Sunman Quote
The DA or DAL versions are optically identical, but the DAL lacks quick-shift and has a plastic bayonet. Do not buy the DA 55-300 PLM, as it won't work on the K5.
Thank you. I will get a SMC DA 55-300mm.
05-21-2019, 04:48 AM   #6
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QuoteOriginally posted by dekao Quote
Thank you. I will get a SMC DA 55-300mm.
I have both the SMC and the HD WR versions, and I can't tell the difference optically. They are both very good.
05-21-2019, 04:53 AM - 2 Likes   #7
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I had a Sigma 70-300 and sold it because I could not get past the clunky build quality...

I now have a DA L 55-300 and am much happier with both the photos and the build quality
05-21-2019, 05:27 AM   #8
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QuoteOriginally posted by Paul the Sunman Quote
I have both the SMC and the HD WR versions, and I can't tell the difference optically. They are both very good.
Yeah I thought of getting a the WR version since its a K-5.. but I rarely shoot in wet conditions. But we never know when the rain comes right

05-21-2019, 05:48 AM - 2 Likes   #9
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QuoteOriginally posted by Paul the Sunman Quote
I have both the SMC and the HD WR versions, and I can't tell the difference optically. They are both very good.
I second this. I can't tell any difference between the two. Both are very good.

Just for the record, I did "audition" the APO version of Sigma's 70-300 before I bought the original DA 55-300 and it wasn't nearly as consistent across the range.


Plus, you get a wider FOV at the wide end (obviously) with the Pentax zooms. It really adds to the versatility of the lens.
05-21-2019, 06:10 AM - 3 Likes   #10
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QuoteOriginally posted by Paul the Sunman Quote
The DA or DAL versions are optically identical, but the DAL lacks quick-shift and has a plastic bayonet. Do not buy the DA 55-300 PLM, as it won't work on the K5.
Tess uses the DA 55-300 PLM on her K-5. I keep telling her it doesn't work. She just keeps taking it and shooting good pictures with it. I haven't done any testing but according to the exifs, it works just fine. Tess just got back from a birthday part with her grand nieces. She shot pretty much the whole thing with the 55-300 PLM. if it's not working, it's hard to tell.
05-21-2019, 07:11 AM   #11
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QuoteOriginally posted by normhead Quote
Tess uses the DA 55-300 PLM on her K-5. I keep telling her it doesn't work. She just keeps taking it and shooting good pictures with it. I haven't done any testing but according to the exifs, it works just fine. Tess just got back from a birthday part with her grand nieces. She shot pretty much the whole thing with the 55-300 PLM. if it's not working, it's hard to tell.
I have to give it a try on my K-5. I just assumed it wouldn't work because I was told it wouldn't.
05-21-2019, 07:27 AM   #12
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QuoteOriginally posted by normhead Quote
Tess uses the DA 55-300 PLM on her K-5. I keep telling her it doesn't work. She just keeps taking it and shooting good pictures with it. I haven't done any testing but according to the exifs, it works just fine. Tess just got back from a birthday part with her grand nieces. She shot pretty much the whole thing with the 55-300 PLM. if it's not working, it's hard to tell.
According to the PF compatibility guide:

Aperture cannot be set;always wide-open

Is she shooting wide-open all the time?
05-21-2019, 12:43 PM - 1 Like   #13
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I have the Tammy 70-300... pretty sharp lens but it does suffer from Purple Fringing in higher contrast scenes.
05-21-2019, 05:14 PM - 1 Like   #14
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For pentax k5, the best option is the pentax 55-300, better than sigma and tamron 70-300 lenses. In contrast, for k1 in FF mode, the pentax 55-300 is not the best choice.
07-03-2019, 08:09 AM   #15
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QuoteOriginally posted by Paul the Sunman Quote
According to the PF compatibility guide:

Aperture cannot be set;always wide-open

Is she shooting wide-open all the time?
i have had it mounted on my K-5IIs and it seems to work just fine and based on the sharpness of my initial test images, seems to stop down. i say this because all the DA 55-300s are pretty soft wide open at longer focal lengths and set at F/9, look similar to when I had my K-50, if not as good as my KP with the same lens. If I am extremely concerned about sharpness at 300mm, I mount my DA* 300.
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