Stan I know Larry said it in a post above but in your response it seems you may have missed it, Paint the inside of the adapter it will eliminate the haze and tape up the holes.
I find that
hand held the Pentax adapter really sharpened up my images. I believe at fast shutter speeds it's because the 1/13th of a second sensor scan time when using the electronic shutter. It does a scan time based microscopic miss-alignment of the image lines and causes some softness. I have no proof of this and no one else has come up with this in any other posts it's just my belief. From what I understand if you set a 1/500 shutter speed each line of the sensor is exposed for 1/500 sec. but it still takes 1/13th of a sec. to scan all of the sensor lines so a time gap between line scans must exist. Someone correct me if I am wrong.
Also I agree with Lowell Goudge that the SR does perform better when a lower value is entered. When using all 3 of my 135's and my ST 150 I found them sharper at 105 and 135 respectively.
Hans
Last edited by hnikesch; 05-07-2013 at 05:26 PM.
Reason: update