Nothing wrong with 2nd hand lenses. But I'd be cautious buying 2nd hand stuff online without seeing it first hand.

3rd party gear like Sigma/Tokina etc are fine as long as you get a good copy (has to be sharp!)

If you can get a sharp Sigma lens than there is nothing wrong with it. There is probably a 85% chance the Sigma will be sharp from the box, whereas the Nikon will be sharp 99.5% of the time.

Sigma isn't a small, cheap ass company either.

But if you have the cash to splash, definitely hit the Nikon up.

This i

I have a few questions about that too...

#1. How do you go about finding out if your sigma is sharp or not? I have a sigma 10-20mm

#2. What can you do if you got a dull one?

Nah, definitely not the same out of the box, especially the cheaper (not implying shit) lenses.

When an item is mass produced, it is impossible to get it 100% correct to exact specifications, that's why there are always tolerances in manufacturing.

When you purchase an expensive lens, such as the Canon 400mm 2.8L IS, you are guaranteed quality as they are hand assembled, calibrated to tight tolerances and thoroughly checked before leaving the door.

Photography is the worst industry when it comes to getting what you pay for



Well, post a picure on here with 100% centre crop and 100% corner crops and we can see what the Sigma is up to.

If you get a dull one it's a simple process of sending it back to Sigma for proper calibration.

This post was edited by lithfkn on Apr 15 2010 10:32pm

Oh okay. How do I do a 100% crop? I am curious now.

There is probably many ways, but just cropping a picture without any rescaling gives a 100% crop

ffs double post
sorry

This post was edited by Futurama on Apr 16 2010 01:29am