ThanksYou have a number of options:
You can get 3. and 4. second hand at reasonable prices. I haven't seen 2. much on the market (except new)
- Macro extension as above, I use it with the 28 P and am rather happy with it
- XCD 3.5/120 Macro - has a reputation for being slow
- XV Lens Adapter with Makro-Planar f/4 120 mm CF
- XH Lens Adapter with HC Macro 4/120 II (make sure you get the II version)