I have a K20d and the following lenses:
- DA15
- DA21
- DA40
- A50/1.4
- DA70
- Tamron 90 AF
- Sigma 100-300/4
As of now, I don't have needs for anything longer than 300mm as I hardly am using the Sigma now (I have it for trips to the zoo, occasional birding, and outdoor sports when my kids are older). Also, the DA15 is plenty wide. I find it too wide, often. My thoughts right now:
- Replace A50/1.4 with DA*55 since I could use a lens that is sealed. This would also eliminate my MF lenses from my bag which would be a positive. DA*55 is $$$ though. I can get the AF for much cheaper by getting the FA50.
- Fill the gap between the DA21 and DA40. I don't think the FA31 is a real option because of price (this gap is not worth spending $900 on). Sigma 30/1.4 or 28/1.8 are options. Also, the FA28/2.8 comes to mind, but I heard it's rendering is rather bland and that I'd probably rather step back with the DA40.
- Wait to see what Pentax has coming, particularly with WR.
- Keep the lens selection as is, and upgrade the body to a K-5.
My biggest wish is for more DA* primes in the wide-normal range....