<p>Antique cameras dot net says "Current lens sold by leica today. Contrast and resolution similiar to the third version, except performance is better to the edges and flare has been reduced. Close up performance is also improved. Six elements in 4 groups. Vignetting 1.9 stops. Since 1979, the optical deisgn has remained the same, but the barrel has seen a few variations such as a focusing tab. Other variations include black finish, chrome finish, titanium finish and even a limited platinum finish. The latest variation of this model features a built-in lenshood ( from 1994-on ). Close focus to .7 meter. Serial #'s 2,909101-3,xxx,xxx. E39 Filter." $1,400 to $1,975.</strong></p>