无意中看了一个对PENTAX镜头的解像度测试，感觉FA43/1.9的表现应该是非常不错的，锐度虽然不是很非常高，但从数据可以看出从中心到四周变化很小，尤其是在F1.9时。在F8-F16时可以说是几近完美。

另附上FA35/2AL的数据，据说这是P的FA系列镜头中最锐的一只。
(刚看了XI老的贴图大法，试试)

Testing Procedure

The body used :  Ricoh XR-8 super (KR-5 III in US market) mounted on a tripod  
The film used :  Kodak T-MAX 100  
The focal distance tested :  x55 of focal length  
The test chart used :  USAF Lens Resolution Test Chart  
The target setup :The test charts were placed as shown above on the wall.
The distances from the center to each test chart on the resulted film are;
target "A" : 0 mm (center), target "B" : 6 mm, target "C" : 12 mm,
target "D" : 15 mm, and target "E" : 18 mm.


The results displayed :  The result of each tested aperture is displayed in a manner below.
(line pairs per mm)

The aperture tested ->  f/5.6  

Resolution on target "A" ->  87  

Sagittal resolution on target "B" ->  87/87  <- Meridional resolution on target "B"  
Sagittal resolution on target "C" ->  87/87  <- Meridional resolution on target "C"  
Sagittal resolution on target "D" ->  78/78  <- Meridional resolution on target "D"  
Sagittal resolution on target "E" ->  78/69  <- Meridional resolution on target "E"  


SMC PENTAX-FA 43mm f/1.9 Limited (FA43/1.9Limited, #0008***)  

f/1.9
55
55/55
55/55
55/55
55/55

f/2.8
69
69/69
69/69
62/62
55/55

f/4
87
87/87
87/87
78/78
69/69

f/5.6
98
98/98
87/87
78/78
78/78

f/8
98
98/98
98/98
98/98
98/87

f/11
98
98/98
98/98
98/98
98/98

f/16
87
87/87
87/87
87/87
87/87

f/22
87
87/87
87/87
78/78
78/69

SMC PENTAX-FA 35mm f/2 AL (FA35/2AL, #5611***)  

f/2
78
78/69
78/69
69/69
69/69

f/2.8
87
78/78
78/78
78/69
69/69

f/4
98
98/98
87/87
87/87
78/78

f/5.6
98
98/98
98/98
98/98
87/87

f/8
98
98/98
98/98
98/98
87/87

f/11
98
98/98
98/98
87/87
87/87

f/16
87
87/87
87/87
78/78
78/69

f/22
78
78/78
69/69
62/62
55/55

没学好，打PP！[此消息已由 xitek 进行编辑(编辑日期 11-07-2000).]

明白啦。多谢XI老！

试一下：

为什么不行？就因为是GIF文件？