Not sure of all the settings at this time and it is taking me a little while to figure things out on this thing. First pictures seem very soft and it very well could be the lens but I have found out a few things in the settings to help sharpen things up a little.
This one is straight from camera. the bottom one was done in Gimp just using unsharp mask.
next is a night shot at iso1600 straight from camera
this last one will show you more of the softness I am seeing.
Here is the Exif data for the last photo.
Standard Information
Make: PENTAX
Model: PENTAX K20D
Software: K20D Ver 1.03
ImageSize: 4672x3104
ComponentsConfiguration: Y, Cb, Cr, -
CreateDate: 2012:12:12 15:19:28
ModifyDate: 2012:12:12 15:19:28
DateTimeOriginal: 2012:12:12 15:19:28
ExposureTime: 1/350"
ExposureProgram: Aperture-priority AE
ExposureBiasValue: 0
MeteringMode: Center-weighted average
Flash: Off, Did not fire
ISO: 100
WhiteBalance: Auto
FocalLength: 0.0 mm
FocalLength35efl: 0.0 mm
SensingMethod: One-chip color area
SceneType: Directly photographed
ColorSpace: sRGB
NoiseReduction: Off
Contrast: High
Saturation: Normal
Sharpness: Hard
ShutterCount: 9539
LensSpec: K or M Lens
GPS Information
Other Information
AEAperture: 0.1
AEBXv: 0
AEExposureTime: 1/372
AELock: Off
AEMaxAperture: 1.2
AEMaxAperture2: 1.2
AEMeteringMode: Center-weighted average
AEMeteringSegments: 8.5 9.4 11.3 11.1 10.0 10.3 7.5 8.5 7.3 8.1 6.5 7.0 6.4 7.8 11.4 6.9
AEMinAperture: 23
AEMinExposureTime: 1/3862
AEProgramMode: Sv or Green Mode
AEXv: 0
AE_ISO: 100
AFAdjustment: 0
AFDefocus: 2
AFIntegrationTime: 0 ms
AFPointMode: Fixed Center
AFPointSelected: Fixed Center
AFPointSelected2: Center
AFPointsInFocus: Center (horizontal)
AFPredictor: -3
ApertureRingUse: Permitted
AutoAperture: Off
AutoBracketing: 0 EV, No Extended Bracket
BatteryADBodyLoad: 178
BatteryADBodyNoLoad: 186
BatteryADGripLoad: 1
BatteryADGripNoLoad: 1
BatteryStates: 4 1
BitsPerSample: 8
BlackPoint: 0 0 0 0
BracketShotNumber: n/a
CPUFirmwareVersion: 1.03.00.10
CameraTemperature: 24 C
ColorComponents: 3
Compression: JPEG (old-style)
CustomRendered: Normal
DSPFirmwareVersion: 1.03.00.10
Date: 2012:12:12
DestinationCity: Miami
DestinationDST: No
Directory: C:\Users\joekelli\Desktop\k20d test
DriveMode: Single-frame; No Timer; Shutter Button; Single Exposure
DriveMode2: Single-frame
DynamicRangeExpansion: Off
E-DialInProgram: P Shift
EVSteps: 1/2 EV steps
EffectiveLV: 0.1
EncodingProcess: Baseline DCT, Huffman coding
ExifByteOrder: Big-endian (Motorola, MM)
ExifImageHeight: 3104
ExifImageWidth: 4672
ExifVersion: 0221
ExposureBracketStepSize: 0.5
ExposureMode: Auto
ExternalFlashBounce: n/a
ExternalFlashExposureComp: n/a
ExternalFlashGuideNumber: n/a
ExternalFlashMode: Off
FNumber: 0.0
FileModifyDate: 2012:12:12 10:19:30-05:00
FileName: JOEM0375.JPG
FileSize: 8.7 MB
FileSource: Digital Camera
FileType: JPEG
FlashExposureComp: 0
FlashExposureCompSet: 0
FlashMeteringSegments: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
FlashMode: Off, Did not fire; Internal
FlashOptions: Normal
FlashStatus: Off
FlashpixVersion: 0100
FocalLengthIn35mmFormat: 0 mm
FocusMode: Manual
FocusMode2: Manual
HighISONoiseReduction: Weak
HometownCity: New York
HometownDST: No
ISOFloor: 100
ImageHeight: 3104
ImageProcessing: Unprocessed
ImageProcessingCount: 0
ImageTone: Bright
ImageWidth: 4672
InternalFlashMode: Off, Normal
InternalFlashStrength: 0
InternalSerialNumber: 142179
InteropIndex: R98 - DCF basic file (sRGB)
InteropVersion: 0100
LensFStops: 8.5
LensID: K or M Lens
LensType: K or M Lens
ManufactureDate: 2008:05:28
MeteringMode2: Multi-segment
MinAperture: 22
MultipleExposureSet: Off
NominalMaxAperture: 1.0
NominalMinAperture: 6
Orientation: Horizontal (normal)
PentaxModelID: K20D
PentaxModelType: 0
PentaxVersion: 4.3.0.0
PictureMode: Aperture Priority, Off-Auto-Aperture; 1/2 EV steps
PictureMode2: Aperture Priority, Off-Auto-Aperture
PowerSource: Body Battery
PreviewImageBorders: 28 28 0 0
PreviewImageLength: 25593
PreviewImageSize: 640x480
PreviewImageStart: 5544
ProductionCode: 2.4
ProgramLine: Normal
Quality: Premium
ResolutionUnit: inches
SRFocalLength: 75 mm
SRHalfPressTime: 4.25 s or longer
SRResult: Not stabilized
SceneCaptureType: Standard
SensitivityAdjust: 0
ShakeReduction: Unknown (12)
ShutterSpeed: 1/350
SlaveFlashMeteringSegments: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
SubjectDistanceRange: Distant
TTL_DA_ADown: 0
TTL_DA_AUp: 0
TTL_DA_BDown: 0
TTL_DA_BUp: 0
ThumbnailLength: 7874
ThumbnailOffset: 54420
Time: 15:19:28
WBShiftAB: 0
WBShiftMG: 0
WB_RGGBLevelsCloudy: 13684 8192 8192 9479
WB_RGGBLevelsDaylight: 12908 8192 8192 10723
WB_RGGBLevelsFlash: 13684 8192 8192 10101
WB_RGGBLevelsFluorescentD: 17081 8192 8192 10101
WB_RGGBLevelsFluorescentN: 14493 8192 8192 11500
WB_RGGBLevelsFluorescentW: 13522 8192 8192 14297
WB_RGGBLevelsShade: 14719 8192 8192 8158
WB_RGGBLevelsTungsten: 8282 8192 8192 19892
WhiteBalanceMode: Auto (Daylight)
WhiteBalanceSet: Auto
WhitePoint: 13088 8192 8192 10752
WorldTimeLocation: Hometown
XResolution: 72
YCbCrPositioning: Co-sited
YCbCrSubSampling: YCbCr4:2:2 (2 1)
YResolution: 72