Tamron 35th Anniversary limited edition SP180mm F/2.5 LD (IF) Adaptall-2, model 63B lensTamron SP 180mm F/2.5 LD (IF) Lens.
A limited-edition model produced to celebrate Tamron's 35th Anniversary.
Produced ~ 1988-1992
Incorporates two LD (low dispersion) glass elements to provide optimized compensation for chromatic aberrations. Employs an internal focusing (IF) system that enable focussing without changes in overall lens length
Model No. 63B
Focal length: 180mm
Aperture: F/2.5 - F/32
Lens construction: 10 elements in 7 groups
Coating: BBAR MC
Min. focus: 1.2m from the film plane
length: 119mm (~124mm with adaptable-2 mount)