HERE GOS
filter thread ; 62mm
aperture range ; f4-5.6 to f32-45
minimum focus ; 0.95m
optical construction ; 13 elements in 9 groups
length ; 117mm
weight ; 458g
accessories ; hood
heres what P.M. rated it.
handling ; 21/25
optical performance : 20/25
autofocus ; 18/25
value for money ; 22/25
sigma 70-300mmDL super
h ; 20
o p ; 18
a ; 18
v o m ; 17
sigma 70-300mm APO
h ; 21
o p ; 21
a ; 20
v f m ; 20
nikon 70-300mmD
h ; 23
o p ; 22
a ; 19
v f m ; 18
At jap CAPA camera book, they rated the tamron and sigma(apo) almost the same. forget the sigma DL. nikon also ok but more expensive.
i think the tamron lens is better than sigma. cheaper also.
hope tis help, if u wanta know the prices, when i shop around i can check for u.