Probably the last from me for the April 2009 project, taken this morning:

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#1.
Attachment 67424
Camera: PENTAX *ist D
Lens: SMC PENTAX-A 50mm F1.7 lens (MF-only)
Other equipment: 49-52mm ring, filter ring
Shutter-speed: 1/400 second
Aperture: F2.0
ISO: 200
Focal length (optical): 50mm

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#2. (No cropping).
Attachment 67421
Camera: PENTAX *ist D
Lens: SMC PENTAX-A 50mm F1.7 lens (MF-only)
Other equipment: 49-52mm ring, filter ring
Shutter-speed: 1/4000 second
Aperture: F1.7
ISO: 200
Focal length (optical): 50mm

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#3. (No cropping).
Attachment 67422
Camera: PENTAX *ist D
Lens: SMC PENTAX-A 50mm F1.7 lens (MF-only)
Other equipment: 49-52mm ring, filter ring
Shutter-speed: 1/160 second
Aperture: F2.8
ISO: 200
Focal length (optical): 50mm

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#4.
Attachment 67423
Camera: PENTAX *ist D
Lens: SMC PENTAX-A 50mm F1.7 lens (MF-only)
Other equipment: 49-52mm ring, filter ring
Shutter-speed: 1/1000 second
Aperture: F2.8
ISO: 200
Focal length (optical): 50mm