Tamron's new 24-70mm f2.8 VC
- Thread starter UncleFai
- Start date
mabmy
Senior Member
Got my lens back today from the service centre. Not sure if its just me or the lens is really a lemon. I was told that there was a front focus issue but after getting it calibrated, the picture still appears soft. Would any kind soul please share with me a high res photo, shot with this lens in jpeg with the picture style set to Faithful with zero sharpening. I want to compare it with my pictures and decide if I should asked for an exchange. I'm really going nuts thinking about it. Kind of even making me regret using a 3rd party lens.
mabmy
Senior Member
Mine is soft at both length, 24 and 70. I tried +- 1 micro af and it just makes things worst.
Kenneth67C
New Member
Mine is soft at both length, 24 and 70. I tried +- 1 micro af and it just makes things worst.
Which camera body are you using?
Pls post a sample "soft" pic.
mabmy
Senior Member
I'm using a 1DX and I will upload one each at different focal length tonight.
mabmy
Senior Member
Here are the sample pics taken. One at 24mm follow by its 100% crop and the other at 70mm followed by its 100%. All photos have no sharpening applied in camera or pp and the 100% crop are at it's focus point.
Shot wide open across all focal length.
24mm
100% crop
70mm
100% crop
mabmy
Senior Member
The first two are handheld with vc on. The coke shot was on a tripod with vc off.
Kenneth67C
New Member
Good question...and when you use the tripod, pls switch off the VC.
mabmy
Senior Member
Yes the 3rd shot at 24mm is on a tripod with vc off. The first two are handheld with vc on. So do you think I could have a bad copy here?
ricleo
Senior Member
+ / - 1 focus adjustment settings usually don't do much to help, try + / - 5 or even 10 to see if any potential front or back focusing is corrected.
the GSH shot looks odd, nothing seems focused. Nandos shot, seems like the wooden holder the menus is standing on is sharper, can't tell from such small size.
coke bottle looks like the water droplets on the left of bottle near the 500ml is sharper. cant tell for sure as well.
perhaps instead of looking at the AF point 100% crop, try searching the entire image to see which part is the Sharpest. That should tell u if the lens is front or back focusing.
the GSH shot looks odd, nothing seems focused. Nandos shot, seems like the wooden holder the menus is standing on is sharper, can't tell from such small size.
coke bottle looks like the water droplets on the left of bottle near the 500ml is sharper. cant tell for sure as well.
perhaps instead of looking at the AF point 100% crop, try searching the entire image to see which part is the Sharpest. That should tell u if the lens is front or back focusing.
huatman
Senior Member
Normally lenses don't perform the best when at largest and smallest aperture. Also any filter on the lens? Use only the center auto-focus point for those shots?
Sorry can't comment much on the sharpness as not really pixel peek.
At speed of 1/8 handheld even with VC, you may still have some some camera shake.
And even on the tripod, may still have some shake. Worst if the tripod are not the very stable type. That why some will use ways to reduce the chances of those shake. E.g use remote, set timer, use mirror up etc.
Sorry can't comment much on the sharpness as not really pixel peek.
At speed of 1/8 handheld even with VC, you may still have some some camera shake.
And even on the tripod, may still have some shake. Worst if the tripod are not the very stable type. That why some will use ways to reduce the chances of those shake. E.g use remote, set timer, use mirror up etc.
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mabmy
Senior Member
I did the test with a 10 sec timer on live view, magnified 10x with mirror lock up, center af point only and vc off for the coke shot. The tripod i used was a manfrotto 055X Pro B, a very heavy, strong and sturdy tripod. I do have a B+W UV filter attached though. from all the pictures i have seen here, it's pretty sharp at 2.8.
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ricleo
Senior Member
hopefully they will do a swap for you! update us on the results.
Well i have given up. Did a lot of testing with and without tripod. With and without vc and it just yields the same result. Just my luck. Think i will bring it back to Tamron service center and see if i could get a new copy instead.
Kenneth67C
New Member
It looks like you do have a soft copy.
Mine is sharp from 2.8 and down to 1/x sec.
Whether the FL is 24mm or 70mm, its still sharp.
Only issues with this lens are:
>It vignets at f2.8,
>It distorts at 24mm
otherwise I love mine to bits because of the price and the VC.
Only other qualm I have is that in low light, the focus acquisition isn't very fast.
mabmy
Senior Member
Bro would you mind sharing a jpeg straight ooc at 24 and 70mm on faithful picture style so that I have a case with the service centre please?
NormanSelvaraju
Senior Member
Yo..
Here you go..
Dunno if this is sufficient. (I don't even know if you consider the image is sharp) I never stopped to think if my lens had any back/front focussing issues. Do let me know if you think it is. Appreciate it.
Cheers.
I was focussing on the gold rim of the coin.
Settings :
ISO 400 f2.8 1/13
Handheld, VC on
IMG_5852 by Norman Selvaraju, on Flickr
IMG_5851 by Norman Selvaraju, on Flickr
Here you go..
Dunno if this is sufficient. (I don't even know if you consider the image is sharp) I never stopped to think if my lens had any back/front focussing issues. Do let me know if you think it is. Appreciate it.
Cheers.
I was focussing on the gold rim of the coin.
Settings :
ISO 400 f2.8 1/13
Handheld, VC on
IMG_5852 by Norman Selvaraju, on Flickr
IMG_5851 by Norman Selvaraju, on Flickr
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