Tamron 17-50

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Slime

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So I had my new lens delivered today - A Tamron 17-50 non-vc. What's the best way to check I've got a decent copy?

Thanks,

Slime
 
Erm..how should this compare against my nifty fifty? It seems very soft at 50mm. Both taken whilst mounted on tripod at 1/3 second at F/2.8 Does this look right?? I'm worried!

primevs1750.jpg
 
something does nt look right there....did you knock the tripod?

what about examples at higher shutter speed to elimate camera movement?
surely a soft copy would be soft no matter what the shutter speed....
 
Doesn't look right at all, not the same lens but my Tamron 28-75mm is sharp wide open throughout the range.

One point - since its on the tripod, did you turn the VC off?
 
The tripod was completely still. Tried a few others which look similar at that length. I can post other examples up if it helps but it won't be until the morning.
 
jpw said:
Doesn't look right at all, not the same lens but my Tamron 28-75mm is sharp wide open throughout the range.

One point - since its on the tripod, did you turn the VC off?
Click to expand...

It's the non-vc version. Really will be gutted if I have to send it back :(
 
Slime said:
It's the non-vc version. Really will be gutted if I have to send it back :(
Click to expand...

Oops - just saw the VC mentioned and assumed, should read more carefully...
 
Can't really compare a prime 50mm f/1.8 with zoom @ 50mm with a max aperture of f/2.8 at 1/3rd sec wide open. Test in the daylight with real-world shutters. Lock the mirror or use a remote to minimise shake.

My Tammy is great at 50mm wide open but does have it's times when focus doesn't quite lock-on and you get a soft hot. Such is life. My 50mm does it. My 80-200mm does it. Every lens does it now and then for me...
 
My Tamron 17-50 performs much better than that - it's not far off my nifty. I'd be inclined to think that's a duffer.
 
Urgh!

Has it just not focused properly? Easy done in lower light. Try with more light or with manual focus? Or with flash?
 
maybe you should try again with f/4, the pictures should be indistinguishable otherwise, give it back.

It's not fair to compare a 50 1.8 at 2.8 and a tamron 17-50 2.8 at Wide open.
Anyway, I think the 17-50 should do better than that, the one I used 3 months ago should do better than that :)
 
I have a 17-50 and I'm very, very attached to it! :D

Your tests aren't great to be honest, far too many variables that could have had an effect. Best thing to do is get out there, and take as many shots with it in as many different real situations as you can. If you're still getting results like these, then you may need to send it back, but you might find something went wrong on the test, the AF got confused etc etc!

Chris
 
Here's another at 50mm f/2.8 from last night. This ones at 1/5 of a second so although it's pretty much the same settings as previously, It at least rules out me knocking the tripod. I used a remote for all of these and it was on a 2 second delay.

I'm going away this weekend and will obviously be taking it with me. I'm sure it will perform better outside but if it's consistently this bad when shooting inside in low light then it's going straight back. So annoyed!

1750f2815sec.jpg
 
1/5 of a second is still a pretty long exposure in the grand sceme of things though. Try 1/100 at minimum to avoid camera shake!

Have you tried focussing manually? If the lens is soft, the results will still be soft. If it needs the AF adjusting, you should still be able to get a sharp shot in manual.

Chris
 
thats def not right, if you are sure you are getting the settings right then it looks like a plastic film is over the lens. Is it the same outside in daylight? are all your shots with it like this? if so it must be a blade or something has been knocked out of kilter or something like that as that isnt even close to being acceptable.
Did you buy it from a shop? go back today if you did
 
Why not take some shots wide open with a more "sensible" shutter speed?
If it's soft a 1/500 then it's a duffer, surely.
 
3 more for you. Each at 1/125s f/5.6. 1st at 17mm, 2nd at 35mm and the 3rd at 50mm.

17mmx.jpg


35mma.jpg


50mm.jpg
 
OK, I'll get out and take some proper pics in the daylight but I'm away all weekend so I won't be able to update until Monday when I am briefly at home. It looks like it's just struggling to focus in low light perhaps.
 
I have this lens, firstly I realised at 50mm 2.8 it is defnitely a little soft, and nothing near as good as my fifty mm at 2.8. But thats completely expected. One is at the end of its reach wide open, the other is a prime a few stops down from wide open, so you have to expect it to be softer.

But it wasn't as bad as the results you displayed.

Secondly, I had to correct it with lens adjustments in camera in order to get it spot on, I think by 20 microadjustments actually, so a pretty serious adjustment there
 
Try taking some images of a focusing sheet. Maybe that will reveal the problem.
 
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