Pentax smc DA 50 mm f/1.8
8. Vignetting
At the maximum relative aperture the lens loses 26% of light in the corners (-0.85 EV) and it is a moderate result. On stopping down the aperture to f/2.0 the situation hardly improves because the vignetting decreases just by about 1%. Only applying f/2.8 makes the problem disappear because that aberration is just 7% (-0.21 EV).
Please Support UsIf you enjoy our reviews and articles, and you want us to continue our work please, support our website by donating through PayPal. The funds are going to be used for paying our editorial team, renting servers, and equipping our testing studio; only that way we will be able to continue providing you interesting content for free. |
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Looking at the data from the chart below you can notice easily that the Pentax compares very favourably with its full frame competitors. The only lens which fares slightly better is the full frame and physically big Canon. Both Nikkors and the Sony are worse hands down.
| |
Pentax 1.8/50 |
Sony 1.8/50 |
Nikkor 1.8/50G |
Nikkor 1.8/50D |
Canon 1.8/50 |
Minolta 1.7/50 |
| f/1.8 |
26% |
38% |
28% |
35% |
26% |
33% |
| f/2.0 |
25% |
31% |
21% |
29% |
20% |
25% |
| f/2.8 |
7% |
13% |
6% |
12% |
6% |
11% |
 |
