doubts about Tamron 17-50 F2.8 on K-5
Posted 01/06/2012 - 09:10
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The front element can get loose on the tamron, prise off the trim ring and check your screws.
I've not noticed an issue with mine but will pixel peek later.
I've not noticed an issue with mine but will pixel peek later.
Lurking is shirking.!
Posted 01/06/2012 - 09:13
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Quote:
Any other suggestions?
Any other suggestions?
Go back to a Pentax lens. Any early SDM issues should be OK by now. The 18-135mm is a superb alternative general purpose lens, using an almost silent DC motor.
Best regards, John
Posted 01/06/2012 - 09:30
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Thanks
the 18-35 is not F2.8. I think I'll blow the dust off my 17-70 f4 for some comparing. Any experiences with the Sigma?
the 18-35 is not F2.8. I think I'll blow the dust off my 17-70 f4 for some comparing. Any experiences with the Sigma?
Posted 01/06/2012 - 09:50
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I trust you have tried focus adjustment? My Tamron is as sharp as anything else I have, including primes. It is much sharper and faster than the 18-135; apples and oranges.
[link=https://500px.com/will_brealey/[/link]
Posted 01/06/2012 - 10:34
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^^^^ that too, I think mine is on -9 even after a service!
Lurking is shirking.!
Posted 01/06/2012 - 11:41
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The Tamron 17-50 is a very sharp lens, sharper than the Pentax according to reviews, however I'm not sure that in real world use you can tell much difference in sharpness between the Sigma/Pentax/Tamron. Incredible value for money when compared to it's peers. Have never once had any issues with mine (2 years and counting).
http://frogfish.smugmug.com/ Pentax. Pentax DA*300/4, Cosina 55/1.2, Lens Baby Composer Pro & Edge 80, AFA x1.7, Metz 50 af1.
Nikon. D800. D600. Sigma 500/4.5, Nikon 300/2.8 VRII, Sigma 120-300/2.8, Zeiss Distagon ZF2 21/2.8, Zeiss Distagon ZF2 35/2.0, Sigma 50/1.4, Nikkor 85/1.8, Nikon TC20EIII, Nikon TC14EII, Kenko x1.4, Sigma 2.0
Nikon. D800. D600. Sigma 500/4.5, Nikon 300/2.8 VRII, Sigma 120-300/2.8, Zeiss Distagon ZF2 21/2.8, Zeiss Distagon ZF2 35/2.0, Sigma 50/1.4, Nikkor 85/1.8, Nikon TC20EIII, Nikon TC14EII, Kenko x1.4, Sigma 2.0
Posted 03/06/2012 - 22:46
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My Tamron is crazily sharp! It's not without faults (e.g. mine tends to underexpose) but its sharpness is excellent.
Posted 04/06/2012 - 02:25
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Yup, as suggested make sure the AF Fine adjustment is set correctly before making any decisions on changing lenses
[i]Bodies: 1x K-5IIs, 2x K-5, Sony TX-5, Nokia 808
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
Lenses: Pentax DA 10-17mm ED(IF) Fish Eye, Pentax DA 14mm f/2.8, Sigma 17-70mm f/2.8, Pentax-A 28mm f/2.8, Sigma 30mm F1.4 EX DC, Pentax-A 50mm f/1.2, Pentax-A 50mm f/1.4, Pentax-FA 50mm f/1.4, Pentax-A 50mm f/1.7, Pentax DA* 50-135mm f/2.8, Sigma 135-400mm APO DG, and more ..
Flash: AF-540FGZ, Vivitar 283
Posted 04/06/2012 - 21:36
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Not sure how the resize will affect this and whether it is of any use but guess which is the DAL35 and which is the Tamron 17-50. Not a brilliant comparison but I had the pics done already.




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Posted 04/06/2012 - 21:40
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Mike-P wrote:
Shouldn't leave the exif intact.
dougf8 wrote:
Not sure how the resize will affect this and whether it is of any use but guess which is the DAL35 and which is the Tamron 17-50
Not sure how the resize will affect this and whether it is of any use but guess which is the DAL35 and which is the Tamron 17-50
Shouldn't leave the exif intact.
It's for fun !!!!!! There are no prizes
Try before looking at the EXIF
Mike, you probably open your Xmas pressies on the day before..... (they are probably all K-mount lenses too )
Lurking is shirking.!
Posted 06/06/2012 - 19:42
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I can't say my Tamron 17-50 has been entirely without issues, but sharpness sure ain't one of them. The sharpness really shouldn't be an issue. Most of the reviews on the internet concur that this is one of the sharpest zooms around, and absolutely stellar for its price point.
If you think it's problematic send it back to Tamron to take a look at it (assuming it's still under warranty).
If you think it's problematic send it back to Tamron to take a look at it (assuming it's still under warranty).
My Flickr • Pentax K-5 • K-5 II • Sigma 8-16mm F/4.5-5.6 DC HSM • Tamron SP AF 17-50mm F/2.8 XR Di II LD ASL • SMC Pentax-DA* 50-135mm F/2.8 ED [IF] SDM • SMC Pentax-DA 55-300mm F/4-5.8 ED • SMC Pentax-DA 18-135mm F/3.5-5.6 ED AL [IF] WR • Vivitar 100mm F/3.5 Macro AF • Metz Mecablitz 58 AF-2
Posted 29/06/2012 - 20:59
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I had sharpness issues with my Tamron too. I had set it to -10, on my K7 and still no help. I had it serviced and it is now on -1 I think and very sharp, lovely wide open too.
I am i the opinion that the service should fix the issue. I'm hoping to upgrade to the K5 myself... so i hope no issues!!
I am i the opinion that the service should fix the issue. I'm hoping to upgrade to the K5 myself... so i hope no issues!!
Proud to be a Pentaxian since 1996:
Cosina C1, Pentax Me Super, Pentax MZ5n, Pentax k10, Pentax K7, Pentax K5ii, Pentax K-S2, Pentax 540 flash,
Sigma 10-20mm, Tamron 17-50mm... MF Tamron 90mm, Pentax 50mm F1.7, Sigma 50mm Macro,
Bowens lights, Yongnuo flash.
Cosina C1, Pentax Me Super, Pentax MZ5n, Pentax k10, Pentax K7, Pentax K5ii, Pentax K-S2, Pentax 540 flash,
Sigma 10-20mm, Tamron 17-50mm... MF Tamron 90mm, Pentax 50mm F1.7, Sigma 50mm Macro,
Bowens lights, Yongnuo flash.
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31 posts
16 years
It seems my only other oprion is a Sigma. Any other suggestions?
TIA
Hendrik