Tamron SP Adaptall-2 24-48mm F/3.5-3.8 Model 13A

Model 13A

Compact

Super-Wide

Zoom

24~48mmF/3.5-3.8
Compact Super-Wide Zoom

Tamron SP Adaptall-2 24-48mm F/3.5-3.8 Model 13A Lens

Tamron SP 24-48mm F/3.5-3.8 Model 13A: A very wide angle to normal zoom lens which is notable for being extremely compact yet offering very good optical performance. Overall this lens provides better than average optical performance compared to many similar OEM lenses of the era. Optical performance is somewhat optimized for the wider angle settings, which is the primary reason why you would buy this type of zoom lens. This lens offers better than average optical performance at 24mm across the entire film plane, is very slightly soft across the film plane until F/5.6 at 35mm, and is very slightly soft until F/8 in the corners at 48mm. Optimal aperture is F/8 at 24mm and F/11 between 35mm and 48m. Tamron's SP 24-48 is definitely one of our favorite lenses and is a splendid example of Tamron's frequent genius for compact optical design.

Lens Specifications:

Lens Model	13A
Focal Length	24 — 48mm
Aperture Range	f/3.5~3.8 — 32, AE
Angle of View	84°~48°
Optical Construction (Groups / Elements)	9 / 10
Min. Focus from Film Plane	23.6" (0.6m)
Macro Mag. Ratio	—
Filter Size	77mm in hood
Diameter	2.5" (64.5mm)
Length at [w/Nikon mount]	2.4" (61.0mm) [2.6" (65.5mm)]
Weight	12.2 oz. (346g)
Lens Hood	Bayonet type #27FH (optional extra).
Accessory	Hood accepts 77mm filters.

Tamron SP 24-48 F/3.5-3.8

PERFORMANCE

Modern Photo's
Standard

as Tested

Focal length: ±5%
(22.80-25.20mm) (45.60-50.40mm)	24.41mm 47.29mm

Aperture: ±5%
at 24mm: (f/3.33-3.68) at 48mm: (f/3.61-3.99)	f/3.53 f/3.95

Distortion:
24mm: (±4%) 48mm: (±1.5%)	2.0% (barrel) less than 1% (barrel)

Light falloff: at f/5.6 +1 stop from theoretical limit
24mm: (0-2.64 stops) 48mm: (0-1.51 stops)	0.60 stops 0.35 stops

Minolta Rokkor-X 24-50 F/4.0

PERFORMANCE

Modern Photo's
Standard

as Tested

Focal length: ±5%
(22.8-25.2mm) (47.5-52.5mm)	25.2mm 47.9mm

Aperture: ±5%
at 24mm: (f/3.8-4.2) at 50mm: (f/3.8-4.2)	f/3.8 f/4.2

Distortion:
24mm: (±4%) 50mm: (±1.5%)	2.3% (barrel) less than 0.5% (barrel)

Light falloff: at f/5.6 +1 stop from theoretical limit
24mm: (0-2.5 stops) 50mm: (0-1.5 stops)	2.0 stops 0.38 stops

Tamron SP 24-48 F/3.5-3.8
F/no.	RESOLUTION at 24mm at 1:48 magnification		CONTRAST at 24mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
3.5	54	34	63	31
4	54	34	64	33
5.6	60	38	71	45
8	60	43	71	48
11	54	48	66	46
16	54	48	60	43
22	48	38	48	35
32	48	38	32	29

Minolta Rokkor-X 24-50 F/4.0
F/no.	RESOLUTION at 24mm at 1:47 magnification		CONTRAST at 24mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %

4	59	30	55	38
5.6	66	38	56	47
8	74	42	57	46
11	66	42	45	42
16	59	38	45	32
22	47	38	35	30

Tamron SP 24-48 F/3.5-3.8
F/no.	RESOLUTION at 35mm at 1:48 magnification		CONTRAST at 35mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
3.65	35	28	34	24
4	35	35	64	26
5.6	35	31	74	28
8	39	35	71	35
11	44	39	70	39
16	35	35	60	34
22	35	35	48	30
32	31	28	32	24

Minolta Rokkor-X 24-50 F/4.0
F/no.	RESOLUTION at 35mm at 1:49 magnification		CONTRAST at 35mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %

4	62	31	52	28
5.6	69	35	56	40
8	69	39	56	35
11	62	39	50	43
16	55	35	44	42
22	44	35	32	25

Tamron SP 24-48 F/3.5-3.8
F/no.	RESOLUTION at 48mm at 1:48 magnification		CONTRAST at 48mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
3.8	50	40	50	15
4	50	40	50	15
5.6	50	45	71	18
8	50	50	72	25
11	56	50	68	39
16	50	50	60	39
22	45	45	47	33
32	45	40	34	27

Minolta Rokkor-X 24-50 F/4.0
F/no.	RESOLUTION at 50mm at 1:51 magnification		CONTRAST at 50mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %

4	51	29	44	15
5.6	57	34	48	16
8	57	34	56	22
11	57	36	60	22
16	51	36	48	22
22	45	36	34	19

Copyright ©2005-MEM-TEK. All rights reserved. Site contents, services and terms of use are subject to change without notice. Adaptall-2.com is not is not affiliated with Tamron Co., Ltd. or with any of its subsidiary companies. Tamron Co., Ltd. and its subsidiaries neither endorse, control, nor claim any responsibility for the content and accuracy of this Web site.