>>3819572>I mostly shoot adaptedSo, bearing in mind that I need to dumb down my sentences to a 4th grade level....
>The huge catalog on Canon matters little unless you're some lens collector.No. The difference is that with Pentax's small lens catalog, you are highly restricted by their lenses. I can give many, many examples, but I'll stick with just the roadbumps I struggled with as a Pentax owner.
>Weather sealingI sold my Pentax kit off in 2017, and at the time, I was shooting a K-3 and getting really frustrated that Pentax's only weather-sealed lenses were either the low end kit zooms (large and plasticky) or the highest end luxury lenses, but some of the best mid range lenses, the DA Limiteds namely, were NOT weather sealed.
>Super telephotoThere is one fundamental, elephant-in-the-room problem here, which is that IBIS is no substitute for OIS. The second problem is that there's really no mid range option. You can either go full-on, balls-deep 560mm unstabilized prime ($5000), you can go enormous 150-450mm zoom ($2000), or you can stick with the lower-end, plasticky 55-300mm zoom, which is going to be just pushing it for acceptable sharpness at 300mm. With Canon, because the secondary market is so robust, you can pick up an excellent EF 70-300L or EF 100-400L for $650 and have a weather sealed, sharp, stabilized lens. There's really nothing like that for K-mount.
>Picking compact, metal quality vs. enormous, plasticky, weather-sealed zoom with soft cornersThis is true of either full frame or APS-C, but if you got into Pentax for compact or metal lenses, then you won't be able to find an acceptable zoom. The better ones are all enormous and the smaller ones are all optically very average. I got into Pentax because the little DA Limited primes are really nice, but I found myself lugging a very large 16-80mm zoom lens most of the time.
