Macro lens for my K10D

Well thats funny as i just bought a macro lens with some of the money from selling you the K10D

I bought the Tamron 90mm macro adaptall and there are a couple on ebay at the monent - you should get a decent Tamron f2.5 with the required extension tube to make it 1.1 for around £90 or the later f2.8 version for around the same price - here are a couple on ebay

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A Tamron SP 2,5/90 (Adaptall), with an PKA-Adapter, is the lens what I use most frecuently. You can see lots of photos with it at this site:
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It's an excelent lens. The limit of scale to 1:2 is a bit limiting, but no too much, as there are remedies. To get bigger scale easyest is to use a Teleconverter: you maintain ability to focus to larger distances; I almost all the time use this lens with an Tamron TC 1,4 (Adaptall), so I have an 3,7/120, a very useful focal length for insects. Maximum scale with this TC is about 0,7, enougph for most situations. For big scale, the specific 45mm extensions (it is possible to use more then one, and you can combine with TCs). All these TCs and extension rings go between the lens and the PKA - mount. That's a very flexible system.

The PKA adapter is a bit difficult to get these days. I got two of them in a regular local shop: there were some left at a distributer. Using it with the more common PK or PK-M adapter (same thing) is less comfortable and limiting, as the P-TTL flash control won't work, and metering will be less precise and easy.

The more recent 2.8/90 (specific PKA mount; non Adaptall) won't need specific adapters nor complements to get scale 1:1, but it might be somewhat more expensive. This lens will reduce focal lenght at bigger scales (as all modern macro lenses), the 2,5/90 doesn't.

Regards - Klaus