Sigma 24-60mm f/2.8 for Nikon SLR showing error on my Nikon D300

[builderbob]

Guys,
I bought a Sigma 24-60mm f/2.8 from Amazon. When I fix it to my Nikon D300, focus is working. But LCD showing some "error" and not able to change aperture or shutter speed or not able to take any picture.
Is this lens compatible with D300? Please advice

 

[ruvor]

hi, assuming it's got one, make sure the aperture ring is set to the smallest aperture (largest number). other than that, not sure

 

[builderbob]

hi, assuming it's got one, make sure the aperture ring is set to the smallest aperture (largest number). other than that, not sure

Thank you for your reply, I did it fixed to 2.8 before locking to the body.

 

[builderbob]

hi, assuming it's got one, make sure the aperture ring is set to the smallest aperture (largest number). other than that, not sure

It worked. I was opening wide the lens aperture ring. When I put to f/22, it worked. Thank you