SMC Pentax Normal Lens Resolution Test Results

---

The following represent the data obtained from lens resolution tests performed on a number of normal Pentax K-mount lenses using high-contrast USAF test targets. For this purpose, normal lenses were considered to be, as defined on Boz Dimitrov's K-mount web site, prime lenses between 40mm and 55mm.

---

Average Center and Corner Resolution (lpm)

Samples	Lens Type	f / 1.2	f / 1.4	1.7/1.8	f / 2	f / 2.4	f / 2.8	f / 4	f / 5.6	f / 8	f / 11	f / 16	f / 22
4 Lenses	40/2.8 M						45 36	52 40	52 45	50 44	48 43	45 42	44 39
2 Lenses	50/1.2 K	39 22		42 25	44 27		49 32	49 35	59 44	66 49	62 47	55 44	50 40
1 Lens	50/1.2 A	39 28		44 28	44 31		44 35	49 44	55 55	62 49	62 49	55 44	44 39
5 Lenses	50/1.4 M		35 21		38 24		42 30	47 35	53 39	58 42	58 44	51 40	46 37
3 Lenses	50/1.4 A		46 32		53 39		55 42	60 46	62 49	62 47	57 49	51 44	46 41
3 Lenses	50/1.7 M			38 30		41 30	43 35	46 44	49 47	55 49	53 46	48 41	44 35
2 Lenses	50/1.7 A			42 31		44 37	47 39	56 42	59 44	62 49	59 47	52 42	47 37
5 Lenses	50/2 M				40 32		44 36	50 40	54 44	55 45	57 45	52 42	43 36
2 Lenses	50/2 A				42 33		47 39	49 44	56 49	62 52	62 49	56 47	49 39
1 Lens	50/2.8 A Macro						49 44	55 49	62 49	55 49	55 49	49 44	44 39
2 Lenses	50/4 M Macro							52 37	55 42	59 47	55 47	52 44	49 42
1 Lens	55/1.8 K			35 28	35 31		39 31	39 31	49 35	62 39	62 44	55 44	55 49
Samples	Lens Type	f / 1.2	f / 1.4	1.7/1.8	f / 2	f / 2.4	f / 2.8	f / 4	f / 5.6	f / 8	f / 11	f / 16	f / 22

---