I assume that your Pentax is point and shoot IQ zoom. Only a few of the very high end and expensive point and shoot compacts had shutter with a top speed of 1/1000 and those came with a fixed wide angle lens. Consumer level point and shoots were designed for color negative film, ISO 200 and 400 with a lens that will stop down to F 22 and slow shutters. For slide film I would step it up to a small body SLR, like the Minolta 600 SI classic. Top shutter speed 1/4000 used Minolta A mount, will work with the vast majority of Minolta AF lens the exception being very late model micro motor lens, will work with any gear driven lens. Meter is good, spot, average and matrix, matrix metering is very good with slide film. Has manual, program, shutter speed and aperture preferred auto exposure, lens AF or turn off the AF and manual focus. You can get a 600 with a short zoom for under $50, a 50mm 1.7 prime for under a $100.