Is the Micro Four third image ful image or cropped (like APS-C)?

I believe your Pentax uses an APS-C sensor, which is typically referred to as a 'crop' sensor.

That simply refers to the fact that it has a smaller sensor than a "Full Frame" 35mm camera (the full frame being a 36mm x 24mm sensor, whereas APS-C is 23.6mm x 15.6mm). So, if you used a lens designed for a full frame camera, your sensor would only capture a portion of the image that same lens would have captured on a full frame camera. Thus, your sensor effectively "cropped" the full frame image.

This means to take a picture from the same spot with your Pentax as with a full frame camera, and, get the same "field of view" (frame the same exact amount of the scene in each image), you would need a "shorter" lens. To get the same scene as a full frame gets with a 43mm lens, you'd need a 28mm lens on your Pentax.

Well, the MFT sensor is even smaller, 17.3mm x 13mm, so to get the same image as the full frame and APS-C sensors described above, you'd need to use a 21.5mm lens.

To calculate the full frame equivalence of an APS-C lens, you multiply the focal length by 1.5. For MFT, you multiply by 2.

So, MFT lenses will seem a little "longer" than the same focal length would on your Pentax. No negative implied, just something to keep in mind when looking at lenses.

The other difference is that the MFT aspect ratio (W/H of the image) is different than full frame or APS-C. Both of those are 3/2 format, whereas MFT is a 4/3 format, so, if you send your images to Costco (or other mass market printers) for 4x6 prints, they will come back missing some of the top and bottom of each image, or, you'll have white space on the sides.

Hope this helps more than confuses.

I think you'll find you MFT camera very capable and be happy with the results.