TAMRON
Model 63B
Fast-Aperture
Telephoto Lens
SP Symbol180mmF/2.5
Fast-Aperture Telephoto Lens
Tamron SP Adaptall-2 180mm F/2.5 LD-IF Model 63B Lens

Tamron SP 180mm LD-IF F/2.5 Model 63B: This is one of Tamron's 35th Anniversary Series lenses and was produced in limited numbers, just 3,000 being manufactured. It is the ideal portrait lens which many professional photographers have criticized for being too sharp! You should always use the accessory lens hood for maximum contrast since the front elements are barely recessed. Nevertheless, lens flare is well controlled within this optical design. This lens also uses internal focusing. Look closely at the optical design for this lens. You will note that Tamron uses two LD elements in the front focus group for near perfect apochromatic performance, and that Tamron uses their unique "spherical aberration compensator group" (the doublet in the middle of the lens) which maintains sharpness even at closer focus distances. The SP 180 remains razor sharp throughout its focus range. Optimal aperture is F/8 although any aperture from F/4 to F/22 is sharp to razor sharp with high to very high contrast. Optical performance is virtually identical to the Nikkor ED 180mm F/2.8 (see comparisons against the Nikkor and other OEM lenses, below).

Lens Specifications:

Lens Model 63B
Focal Length 180mm
Aperture Range f/2.5 — 32, AE
Angle of View 13°
Optical Construction
(Groups / Elements)
7 / 10
Min. Focus from Film Plane 47.2" (1.2m)
Macro Mag. Ratio
Filter Size 77mm
Diameter 3.2" (81.5mm)
Length at
[w/Nikon mount]
4.7" (119.5mm)
[4.9" (124mm)]
Weight 28.2 oz. (800g)
Lens Hood Bayonet type #73FH, reversible.
Accessory Accepts SP 2X tele-converter #01F and SP 1.4X tele-converter #140F. Supplied wth lens hood.
Tamron SP 180mm F/2.5
PERFORMANCE
Modern Photo's
Standard
as Tested
Focal length: ±5%
(171.00-189.00mm) 177.21mm
Aperture: ±5%
(f/2.38-2.63) f/2.56
Distortion:
(±2.5%) 0.93% (pincush.)
Light falloff: at f/5.6
+1 stop from theoretical limit
(0-1.0 stops) 0.4 stops
Nikkor ED 180mm F/2.8
PERFORMANCE
Modern Photo's
Standard
as Tested
Focal length: ±5%
(171.00-189.00mm) 181.02mm
Aperture: ±5%
(f/2.66-2.94) f/2.83
Distortion:
(±2.5%) under 1% (pincush.)
Light falloff: at f/5.6
+1 stop from theoretical limit
(0-1.0 stops) 0.3 stops
Tamron SP 180mm F/2.5
F/no. RESOLUTION
at 1:51 magnification
CONTRAST
(30 lines/mm)
Center
Lines/mm
Corner
Lines/mm
Center % Corner %
2.5 51 45 43 38
4 57 51 50 40
5.6 64 57 65 53
8 64 57 66 55
11 57 51 61 55
16 57 51 52 49
22 51 45 48 39
32 51 45 46 35
Nikkor ED 180mm F/2.8
F/no. RESOLUTION
at 1:50 magnification
CONTRAST
(30 lines/mm)
Center
Lines/mm
Corner
Lines/mm
Center % Corner %
2.8 50 45 44 40
4 56 50 50 42
5.6 56 50 57 46
8 63 56 60 50
11 63 56 56 44
16 56 50 48 41
22 56 50 40 32
32 50 45 34 28
Olympus Zuiko180mm F/2.8
PERFORMANCE
Modern Photo's
Standard
as Tested
Focal length: ±5%
(171.00-189.00mm) 183.2mm
Aperture: ±5%
(f/2.66-2.94) f/2.90
Distortion:
(±2.5%) 0.45% (pincush.)
Light falloff: at f/5.6
+1 stop from theoretical limit
(0-1.04 stops) 0.48 stops
Olympus Zuiko180mm F/2
PERFORMANCE
Modern Photo's
Standard
as Tested
Focal length: ±5%
(171.00-189.00mm) 180.57mm
Aperture: ±5%
(f/1.90-2.10) f/2.01
Distortion:
(±2.5%) less than 1% (pincush.)
Light falloff: at f/5.6
+1 stop from theoretical limit
(0-1.0 stops) 0.2 stops
Olympus 180mm F/2.8
F/no. RESOLUTION
at 1:49 magnification
CONTRAST
(30 lines/mm)
Center
Lines/mm
Corner
Lines/mm
Center % Corner %
         
2.8 44 39 28 30
4 49 44 46 25
5.6 55 49 50 22
8 55 49 53 21
11 62 49 52 21
16 55 44 52 20
22 49 39 50 20
32 39 35 48 21
Olympus Zuiko180mm F/2
F/no. RESOLUTION
at 1:49 magnification
CONTRAST
(30 lines/mm)
Center
Lines/mm
Corner
Lines/mm
Center % Corner %
2 55 49 51 40
2.8 62 55 58 43
4 69 62 60 48
5.6 69 62 63 53
8 69 62 67 55
11 62 55 58 50
16 62 55 50 41
22 55 49 47 36
         
Minolta Rokkor 200mm F/2.8
PERFORMANCE
Modern Photo's
Standard
as Tested
Focal length: ±5%
(190-210mm) 191.4mm
Aperture: ±5%
(f/2.66-2.94) f/2.90
Distortion:
(±3%) 1.1% (pincush.)
Light falloff: at f/5.6
+1 stop from theoretical limit
(0-1.01 stops) 0.77 stops
Minolta Rokkor 200mm F/2.8
F/no. RESOLUTION
at 1:50 magnification
CONTRAST
(30 lines/mm)
Center
Lines/mm
Corner
Lines/mm
Center % Corner %
2.8 45 40 28 19
4 50 45 36 24
5.6 56 45 40 28
8 56 50 44 30
11 56 50 44 32
16 56 50 40 32
22 50 45 36 32
32 40 35 30 24
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