I bought my first Pentax,
THE first Pentax ever made (series, not serial number) with a Takumar 55mm f/2.2 lens, in a pawn shop in Vancouver BC, Canada, in 1961. I met some very nice people who loved taking pictures, and they helped me learn how to use this fancy advanced camera. I added a Takumar 135/3.5 later the same year, and years later finally got around to buying a wide angle, a 28/3.5 Takumar SMC.
The old Pentax' shutters wore out and a collector who owned a camera shop swapped me a used KX with an SMC 55/1.8 and an M42 to K mount adapter for it with its 55/2.2 original lens, and proudly put it on his display rail. Imagine that: my light meter was right in the finder, and I could see the f/stop in the periscope and the shutter speed I had set and what my meter thought it should be, all without taking my eye from the viewfinder. The new camera even stopped the lens down all by itself to what I had set; I no longer had to flick the second aperture ring to close the lens down to taking aperture. he wonders of technology!
I swapped the 135 and 28 for K mount versions (both M as it happens). I started working as the accountant at a newspaper and took photos of my kids in sports, and decided I just had to have a winder. I was sticking my thumb into my eye too often. I bought a brand new SF-1 (I couldn't afford the LX with winder I really wanted), foolishly trading in the KX. Later I bought the A 70-210 rather than the F 70-210 that was right beside it because it was a stop faster at the long end, and replaced the 135. I bought a 1.4X-S to make my 70-210 longer sometimes.
I came across the M 400/5.6 for $330 in the mid 80's. I bought a used ME and a new FA 28-80 for my wife to take in her backpack for a two month cycling vacation in Europe September and October 1991. A nice light, compact and flexible combination.
When my wife's eyes started to get a bit blurry, she started using the SF-1 rather than the ME, with the 28-80. She could let the camera focus. I bought the MZ-S and FA 24-90 for my use. I tried a couple of other brands of lens along the way, and was not happy with the results, so they were retired. I bought a Pentax 28/3.5 shift lens while I was living in Chicago, and a Sigma 170-500. I did some trading when I came back, and ended up with the 100 macro and a few dollars and a couple of other goodies. The ME and 28/3.5 no longer show in my signature because my daughter in law is using them on permanent loan. A small legacy from my father allowed me to buy the k10D with grip and 12-24, the DA* 16-50 and the DA* 50-135. I have recently purchased the Pentax AF 1.7X converter in the forum market place.
That's how my kit grew, slowly and piece by piece. A little wider here, a little longer there, a little automation on the back end of the lens, and finally digital. Isn't it nice that I can still use everything I own? Isn't it nice that I don't have to run out and replace everything, just because I bought an autofocus Pentax body, as happened to those poor Canon and Minolta owners back in the 1980's?
The K10D focuses a bit slower than the D3, but still a lot faster than me. The M lenses are a bit of a hassle to expose with, but I'm learning how. One of these years, I just might trade the M's for DA versions, but maybe not the macro - I like snap-in-focus for flowers and bugs, I do. There is no rush. I use Pentax gear, I can take my time to go through the changes.
Pentax is perfect? No. But neither is anyone else. I would like a few changes to the K10. I would like it to still accept an f/stop ring and expose as well as it does on the MZ-S, but it ain't going to happen. It would be wonderful if it had a noise free ISO 6,400. It ain't going to happen. It will never be able to use my AF500FTZ flash, either, darn it.
I used to maintain my cars myself. On my new truck, I can't even find the spark plugs. Technology advances. We old Pentax users are very, very lucky. We can still use the old gear, with a bit of adjustment on our parts. Our gear is not better, nor any worse, than the others out there. We fail here, they fail there, we cost less, they cost more, ....
I warned you about the length.