wow.. u must know the staff well to let u test for so long? what ifI did not say quick test... but when I buy a lens, I will shoot it for around 30mins to check for various issue.... Usually, when I want to buy, then I do this test....
1. check physical condition
2. Check for dusts
3. Test color and saturation of lens
4. Test sharpness (centre, edge)
5. Test different range... eg. 24 - 105... test at 24, 35, 70, 105mm......
6. Test different aperture...
7. test different focusing point..... :bsmilie::bsmilie:
u end up not satisfied with the product and decided not to get it? :x