This lens employs an IF (Internal Focusing) system that maintains the overall length of the lens during focusing. Uses two LD (Low Dispersion) glass elements that effectively compensate for chromatic aberration. Provides high-contrast, outstanding image quality and a soft out-of-focus background effect. Incorporates an AF/MF one touch switchover mechanism built into the focus ring (for Canon & Nikon only). Super performance series provides high performance through outstanding design specifications.
FEC (Filter Effect Control): Features the new FEC (Filter Effect Control) function that enhances operational ease of Polarizing Filter use. The new Filter Effect Control is designed to rotate the filter to the desired position while the hood is attached. This is accomplished by turning the FEC ring that in turn rotates the portion of the filter mount where the filter is mounted.
There is no doubt the Tamron SP AF 180mm f/3.5 Di LD [IF] Macro 1:1 is a superb lens, with many fine features. It is capable of producing excellent pictures in both the close-up and telephoto ranges.
The Tamron AF 180mm f/3.5 SP Di LD [IF] macro offers a near-flawless performance. Optically it doesn’t leave anything to be desired – the resolution is very good to excellent from f/3.5 all the way down to f/16 and vignetting, CAs and distortions are non-issues in field conditions.
Tamron SP AF 180mm f/3.5 Di LD (IF) Macro 1:1: Pros
- Resolution when stopped down to F/5.6 or smaller
- Fantastic control of Colour Aberrations
- FEC is a nice touch
- Good build quality
- Good value for money
Tamron SP AF 180mm f/3.5 Di LD (IF) Macro 1:1: Cons
- Resolution at f/3.5
- Slow auto focus
- No focus limiter switch
The main positive points of the Tamron SP AF 180mm f/3.5 Di are:
- Handles well and feels right.
- Good contrast
- Good control of distortion and aberrations
Negative points are:
- Pure resolving power is disappointing
- Price a little steep for performance