Too much!
Started off with manual Minolta (Minolta changed their mount in the move to AF) and then switched to Canon FD (another dead system now with tonnes of cheap and extremely high quality glass around) before moving to Pentax digital. In Minolta, I had 50/1.7 and 28-70/3.5-4.5. In Canon FD, at different times, I had 50/1.8, 50/1.4, 28/2.8, 28/2.0, 100/2.8, 85/1.8, a no brand 80-200mm, A-1, AE-1P and T60. Only one of those Canons broke, necessitating purchase of one of the other ones. How I miss the A-1 and the faster primes - the FD 28/2 is still the most satisfying lens I ever owned.
But I fancied a wider angle, and wanted digital convenience.
I decided to do Pentax only because of the 16-45mm f/4 ED AL. I don't know how things are now, but 18 months ago, there was no equivalent slightly-wider-than-normal zoom at this price point available from any other brand. The Olympus 11-22mm (=22-44mm) is quite a bit dearer, and the f/2.8 zooms from others were bulky professional affairs. So I just waited for a new body (in the shape of the K100D) and bought the zoom at the same time. I have bought and sold a FA 28-70/4 AL mainly on build quality grounds - the lens behaved fine, but just felt flimsy.
I bought the Sigma 24mm 2.8 PKA as a small alternative standard. The performance is surprisingly good, but manual focus is not so easy with modern focusing screens. I am also getting bored of being asked what focal length I am using (for shake reduction) on start up. The DA21 would solve my two problems, save some space but cost me some speed. The Sigma is the size of two pancake lenses back-to-back, so not so big. It is definitely more portable than the 16-45/4! Also, I find that giving the camera+MF lens to people unfamiliar with MF usually results in no photo, and loads of grumbles about how fiddly it is.
I also bought a cheap-as-chips Ricoh 50mm 1.7 but find it a bit disappointing. I can cope with manual focus AND stopped down metering AND the camera asking me for the focal length for SR, but the faff isn't worth the trouble half the time. Very flare prone! It has potential, but I simply haven't managed to exploit it satisfactorily yet.
I'll continue to run my 16-45/4 + 24/2.8 + 50/1.7 for the moment. I just don't take enough snaps to justify the costs of further changes at present. I need to get out more and utilise what I have already, rather than waste time thinking about kit I could have.
But I still really fancy the DA21/3.2 and the forthcoming DA55/1.4, to replace my manual focus lenses. Not more LBA! Maybe if I write to Santa early enough for next Christmas...
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