Tamron Adaptall-2 35-135mm F/3.5-4.5 Model 40A

Model 40A

High Ratio

Macro

Zoom

35~135mmF/3.5-4.5
High Ratio Macro Zoom

Tamron Adaptall-2 35-135mm F/3.5-4.5 Model 40A Lens

Tamron Adaptall-2 35-135mm F/3.5-4.5 Model 40A: A moderate wide angle to moderate telephoto zoom lens with above average optical performance. This lens is more compact than the earlier model 22A and features a completely new optical design which retains a floating front focus group as used in the earlier model 22A optical design. This lens trades off the earlier model's CF macro ability at 135mm in favor of a significantly more compact overall design. Maximum macro magnification is achieved at 35mm by using the built-in macro button and turning the macro helicoid ring, an operation which is similar in function to Tamron's SP 28-135. Although the macro function is less convenient compared to the earlier model 22A design, this lens is more compact and uses smaller filters.

Lens Specifications:

Lens Model	40A
Focal Length	35 — 135mm
Aperture Range	f/3.5~4.2 — 32, AE
Angle of View	63°~18°
Optical Construction (Groups / Elements)	13 / 15
Min. Focus from Film Plane	31.5" (0.8m) at f=135mm 11" (0.28m) at 35mm in macro mode
Macro Mag. Ratio [w/2X Converter]	1:4 [1:2] at f=35mm
Filter Size	58mm
Diameter	2.6" (65mm)
Length at [w/Nikon mount]	3.8" (96mm) [4.0" (100.5mm)]
Weight	19.3 oz. (547g)
Lens Hood	Bayonet type #79FH, (optional extra).
Accessory	Accepts SP 2X tele-converter.

Tamron 35-135 F/3.5-4.5
F/no.	RESOLUTION at 35mm at 1:50 magnification		CONTRAST at 35mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
3.5	50	45	45	33
5.6	56	50	55	41
8	63	56	66	54
11	63	56	67	50
16	56	50	56	44
22	56	50	46	37
32	50	45	34	38

Tamron 35-135 F/3.5-4.5
F/no.	RESOLUTION at 80mm at 1:50 magnification		CONTRAST at 80mm (30 lines/mm)
F/no.	Center Lines/mm	Corner Lines/mm	Center %	Corner %
4.3	50	45	47	34
5.6	56	50	57	44
8	56	50	68	54
11	63	56	64	51
16	63	56	54	42
22	56	50	46	38
32	50	45	35	29

Tamron 35-135 F/3.5-4.5
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 %
4.5	56	50	46	33
5.6	56	50	56	42
8	63	56	69	55
11	63	56	63	52
16	56	50	54	44
22	56	50	46	36
32	50	45	34	28

Tamron 35-135 F/3.5-4.5
F/no.	MACRO RESOLUTION at 35mm/ 1:4
F/no.	Center Lines/mm	Corner Lines/mm
3.5	32	29
5.6	36	29
8	36	29
11	40	32
16	40	32
22	45	36
32	40	32

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