karl_beath

<p>I have tried to get information on this, but have found nothing definitive.<br> Are there any sites comparing these lenses in mtf numbers, or has anyone used them and can give me an answer. <br> I have owned and used both the pentax lenses and was always happy with the result (tripod, mirror lockup and cable release). Is the 50mm in the same ballpark as the other two ito sharpness?<br> Thanks</p>