Sample Images: Pentax 18-135mm f/3.5-5.6 ED AL [IF] DC SMC DA WRSample Images: Pentax 18-135mm f/3.5-5.6 ED AL [IF] DC SMC DA WR(All images copyright Photography Online, Inc.)
Still Life tests, Pentax K-5 body (sub-frame sensor)
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VFA Target, Pentax K-5 body (sub-frame sensor)
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| 18mm f/3.5 | |
 Upper Left |  Center |
| 18mm f/8 | |
 Upper Left |  Center |
| 50mm f/4.5 | |
 Upper Left |  Center |
| 50mm f/8 | |
 Upper Left |  Center |
| 135mm f/5.6 | |
 Upper Left |  Center |
| 135mm f/8 | |
 Upper Left |  Center |