Tamron SP Adaptall-2 180mm F/2.5 LD-IF Model 63B

Model 63B

Fast-Aperture

Telephoto Lens

180mmF/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)
F/no.	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)
F/no.	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)
F/no.	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)
F/no.	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)
F/no.	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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