Tamron SP Adaptall-2 60-300mm F/3.8-5.4 Model 23A

Model 23A

5x Powerful

Telephoto

Zoom

60~300mmF/3.8-5.4
5x Powerful Telephoto Zoom

Tamron SP Adaptall-2 60-300mm F/3.8-5.4 Model 23A Lens

Tamron SP 60-300mm F/3.8-5.4 Model 23A: A somewhat above average performer compared to after market and OEM lenses within its class. Very good sharpness and contrast for a 5:1 zoom lens. Features macro at 60mm down to 1:1.55 with very good central image quality at moderate apertures combined with mediocre corner image quality. If you seek a normal to long telephoto zoom for general purpose sports and nature photography, then this is the lens to buy. If you desire better overall optical performance, better and more versatile macro performance, and are willing to sacrifice the longer 200mm to 300mm telephoto portion of the zoom range, then the SP 70-210 model 19AH is a much better choice. Nevertheless, this lens is a very good performer for those who need a near normal to long telephoto zoom lens.

Lens Specifications:

Lens Model	23A
Focal Length	60 — 300mm
Aperture Range	f/3.8~5.4 — 32, AE
Angle of View	40°~8°
Optical Construction (Groups / Elements)	11 / 15
Min. Focus from Film Plane (normal mode)	74.8" (1.9m)
Min. Focus from Film Plane (macro mode)	11.8" (0.3m) at f=60mm
Macro Mag. Ratio [w/2X Converter]	1:1.55 [1:0.775] at f=60mm
Filter Size	62mm
Diameter	2.7" (68mm)
Length at [w/Nikon mount]	6.3" (161.5mm) [6.5" (166mm)]
Weight	30.7 oz. (870g)
Lens Hood	Bayonet type #48FH (included).
Accessory	Accepts SP 2X tele-converter #01F.

Tamron SP 60-300 F/3.8-5.4

PERFORMANCE

Modern Photo's
Standard

as Tested

Focal length: ±5%
(57.00-63.00mm) (285.00-315.00mm)	62.68mm 290.37mm

Aperture: ±5%
at 60mm: (f/3.61-3.99) at 300mm: (f/5.13-5.67)	f/3.98 f/5.46

Distortion:
60mm: (±1.5%) 300mm: (±3.5%)	1.5% (barrel) 2.3% (pincush.)

Light falloff: at f/5.6 +1 stop from theoretical limit
60mm: (0-1.4 stops) 300mm: (0-1.0 stops)	0.8 stops 0.9 stops

Tamron SP 60-300 F/3.8-5.4
F/no.	RESOLUTION at 60mm at 1:51 magnification		CONTRAST at 60mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
3.8	57	45	45	39
5.6	57	45	48	40
8	64	51	54	42
11	57	51	53	44
16	57	51	49	32
22	51	45	45	29
32	51	40	34	27

Tamron SP 60-300 F/3.8-5.4
F/no.	RESOLUTION at 135mm at 1:50 magnification		CONTRAST at 135mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
4.7	56	45	49	39
5.6	63	50	51	40
8	63	50	55	41
11	56	50	57	40
16	50	50	46	30
22	50	45	43	29
32	45	45	36	26

Tamron SP 60-300 F/3.8-5.4
F/no.	RESOLUTION at 300mm at 1:50 magnification		CONTRAST at 210mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
5.4	50	45	49	35
8	56	50	53	36
11	50	45	55	34
16	45	45	48	30
22	45	40	42	29
32	45	40	34	28

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