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Sigma 150-500mm f/5-6.3 AF APO DG OS

Review Date: May 24, 2008 Recommend? yes | Price paid: Not Indicated | Rating: 9 

Pros: Optical Stabilisation, HSM, Price, weight (handholdable), works OK with 1.4 TC, lock
At the high end of the zoom it is significantly better stopped down to F8, especially on a full size DSLR like the 5D

I have just purchased this 'toy' this morning and do now believe to own one of the first copies in The Netherlands. It is important to realize I bought this baby to replace my old 170-500, which worked well for me. The OS and HSM were however great excuses to make the switch and put the 170-500 on sale.

I am definitely not disappointed. Although heavier, this one is still easily handholdable weighing less than 2kg. The OS works great, as does the HSM. It really is a step up from the old one and I believe it can hold its own against the Canon 100-400 IS. I bought the 1.4 EX TC from Sigma to go with it. This means MF, but still good image quality and an effective 700mm for somewehere around 1000 euro's.

Compared to my 170-500 the lock button is much appreciated: the old one would slide down and come to an abrupt halt whenever pointed down. Although the zoom of the 150-500 already is better and prevents thsi sliding down, the lock is there as an extra help and assurance.

I'll be posting again after about a week to give you an update based on real field testing.