Question about EF 100mm f2.8 Macro USM

[whoope3]

Hi all,

I've recently purchased a EF 100mm f2.8 Macro USM lens from a fellow CS'er, and now using it on a 60D.

However, i can't seem to get sharp images with a large aperture. The images get sharper as the aperture gets smaller.

Is this normal? Can anybody shed some light on this?

Any help would be appreciated, thanks!

I did a test with the following setup:
Canon 60D
EF 100mm f2.8 Macro USM
Aperture-Priority (f2.8 ~ f7.1)
ISO100
Tripod mount

Results:

 

[Snoweagle]

Hi all,

I've recently purchased a EF 100mm f2.8 Macro USM lens from a fellow CS'er, and now using it on a 60D.

However, i can't seem to get sharp images with a large aperture. The images get sharper as the aperture gets smaller.

Is this normal? Can anybody shed some light on this?

Any help would be appreciated, thanks!

I did a test with the following setup:
Canon 60D
EF 100mm f2.8 Macro USM
Aperture-Priority (f2.8 ~ f7.1)
ISO100
Tripod mount

Results:

It should be sharp at f/2.8 too.

 

[fitlies]

Have you tried using MF?

 

[raydio]

The Canon 100mm f/2.8 macro should be sharp at all apertures. Your copy appears to be back/front focused. I would suggest that you take it to CSC for calibration.

 

[engrmariano]

as they've said, it's sharp even at f/2.8... did you MF or AF during those test shots?... btw, i had 2 copies of this lens before, both performed great...

 

[troyx79]

I have the same setup and I don't have any issues with 100mm 2.8 wide open. It's sharp wide open. I would suggest trying manual focus using live view mode though I use AF most of the time.

 

[Snoweagle]

TS, take yr lens to CSC for calibration as suggested by raydio. Yr lens is not performing as it's intended for.

 

[whoope3]

The shots were taken in AF, but i have tried MF many times before as well. Results were same

Time for a trip to CSC then.

Thank you all!

 

[Snoweagle]

The shots were taken in AF, but i have tried MF many times before as well. Results were same

Time for a trip to CSC then.

Thank you all!

Make sure after calibration and before u leave CSC, better check if it's still sharp at all apertures. If not keep nagging at them.

 

[mightybod]

I didn't have problems with mine.
As they mentioned earlier, take it down to CSC..

 

[Tyrov]

Is your tripod stable and are you using a shutter release cable? When I got my 100 I noticed the DOF is so small that even the smallest movement from me when shooting will throw off the focus.