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Asahi Super-Takumar 1:1.4/50

Description and Review

Description, Notes & Specifications

Manufactured:	1964—1965
Camera Mount:	M42x1
Lens Elements / Groups:	8 / 7
Diaphragm Type:	automatic / manual
Diaphragm Blades:	6 / hexagonal
Angle of View:	46°
Maximum Aperture:	f/1·4
Minimum Aperture:	f/16
Minimum Focus Distance:	0·45 metres
Magnification Factor:	—
Filter Size:	ø 49 mm (screw)
Length:	38 mm / 45·5 mm
Largest Diameter:	58·5 mm
Weight:	≈245 grams
Product Numbers:	358 / 35800
Serial Number Range:	—
My Serial Number:	1648798

Distance engravings in yellow (metres) and blue (feet).

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Variations: Diaphragm ring with fine or coarse knurls; round or oval lettering.

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Warning: Not to be used on cameras older than the Spotmatic, except the early S1 models, but can be used on the S1a/H1a and the SV/H3v models, if fitted with the later crescent-shaped push plate.

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Depth of Field Guide

	f/1·4		f/2		f/2·5		f/2·8		f/3·5		f/4		f/4·5		f/5·6		f/6·7		f/8		f/9·5		f/11		f/16
0·45	0·45	0·45	0·45	0·45	0·44	0·46	0·44	0·46	0·44	0·46	0·44	0·46	0·44	0·46	0·44	0·46	0·44	0·47	0·43	0·47	0·43	0·47	0·43	0·48	0·42	0·49
0·50	0·50	0·50	0·49	0·51	0·49	0·51	0·49	0·51	0·49	0·51	0·49	0·51	0·49	0·51	0·48	0·52	0·48	0·52	0·48	0·52	0·47	0·53	0·47	0·53	0·46	0·55
0·55	0·55	0·55	0·54	0·56	0·54	0·56	0·54	0·56	0·54	0·56	0·54	0·56	0·53	0·57	0·53	0·57	0·53	0·57	0·52	0·58	0·52	0·59	0·51	0·59	0·50	0·61
0·60	0·59	0·61	0·59	0·61	0·59	0·61	0·59	0·61	0·59	0·62	0·58	0·62	0·58	0·62	0·58	0·62	0·57	0·63	0·57	0·64	0·56	0·64	0·56	0·65	0·54	0·68
0·70	0·69	0·71	0·69	0·71	0·69	0·71	0·68	0·72	0·68	0·72	0·68	0·72	0·67	0·73	0·67	0·73	0·66	0·74	0·66	0·75	0·65	0·76	0·64	0·77	0·62	0·81
0·80	0·79	0·81	0·78	0·82	0·78	0·82	0·78	0·82	0·77	0·83	0·77	0·83	0·77	0·84	0·76	0·85	0·75	0·85	0·74	0·87	0·73	0·88	0·72	0·89	0·69	0·95
0·90	0·89	0·91	0·88	0·92	0·88	0·93	0·87	0·93	0·87	0·94	0·86	0·94	0·86	0·95	0·85	0·96	0·84	0·97	0·83	0·99	0·82	1·00	0·80	1·02	0·77	1·09
1·00	0·98	1·02	0·98	1·02	0·97	1·03	0·97	1·04	0·96	1·04	0·95	1·05	0·95	1·06	0·94	1·07	0·92	1·09	0·91	1·11	0·90	1·13	0·88	1·15	0·84	1·24
1·20	1·18	1·23	1·17	1·24	1·16	1·25	1·15	1·25	1·14	1·27	1·13	1·28	1·13	1·29	1·11	1·31	1·09	1·33	1·07	1·36	1·05	1·40	1·03	1·43	0·97	1·57
1·50	1·46	1·54	1·45	1·56	1·43	1·57	1·43	1·58	1·41	1·60	1·40	1·62	1·38	1·64	1·36	1·67	1·33	1·71	1·31	1·76	1·28	1·82	1·25	1·88	1·16	2·13
2·00	1·93	2·07	1·90	2·11	1·88	2·13	1·87	2·15	1·84	2·19	1·82	2·22	1·80	2·25	1·75	2·32	1·71	2·40	1·67	2·50	1·62	2·62	1·57	2·76	1·43	3·33
3·00	2·85	3·17	2·79	3·25	2·74	3·31	2·71	3·35	2·65	3·46	2·61	3·53	2·56	3·61	2·48	3·80	2·39	4·02	2·30	4·30	2·21	4·68	2·12	5·13	1·87	7·58
5·00	4·59	5·49	4·44	5·73	4·32	5·94	4·25	6·08	4·09	6·42	3·99	6·70	3·89	6·99	3·69	7·75	3·51	8·69	3·32	10·14	3·12	12·56	2·95	16·50	2·48	∞
10·00	8·49	12·17	7·97	13·42	7·58	14·67	7·37	15·54	6·92	18·04	6·62	20·38	6·36	23·43	5·84	34·87	5·40	∞	4·95	∞	4·53	∞	4·17	∞	3·29	∞
∞	35·83	∞	28·10	∞	23·82	∞	21·82	∞	18·26	∞	16·35	∞	14·80	∞	12·25	∞	10·45	∞	8·90	∞	7·60	∞	6·63	∞	4·66	∞

(Distances in metres; Circle of Confusion is taken at 0·032 millimetres.)

Review

Recommended: Not Tested

References

1. van Oosten, G. 1999. The Ultimate Asahi Pentax Screw Mount Guide. Uitgeverij Jansz.

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http://southerncape.co.za/recreation/photography/lenses/asahi/super-takumar_50mm_f14_i.php

23 July 2011