My Sigma Lens for my Contax

akane · 30th December 2003

Hi,

Bought a cheap Sigma lens (70-300mm C/Y mount) off the web quite some time ago.
I noticed that during my nite shoot. At 300mm, the focus is totally off.
However during my day shoot (bright sunlight), the focus at 300mm is very sharp.

I know it has got something to do with the lights getting into the lens but maybe someone can explain further?

Thanks.

30th December 2003	#1
akane Member Join Date: Jun 2003 Location: Sydney Posts: 181	My Sigma Lens for my Contax Hi, Bought a cheap Sigma lens (70-300mm C/Y mount) off the web quite some time ago. I noticed that during my nite shoot. At 300mm, the focus is totally off. However during my day shoot (bright sunlight), the focus at 300mm is very sharp. I know it has got something to do with the lights getting into the lens but maybe someone can explain further? Thanks. __________________ Confidence is thinking you'll be Champions, arrogance is stating it.