[Waxing_Gibbous (Peter)]

Originally Posted by DavidU

Marc, these are very nice but rare. They have an 18 blade iris so the diffraction spikes are minimal.
There are many 200mm f/4 Takumar lens's avail aswell.
http://www.ebay.com.au/itm/M42-TAKUM...item4cf75f3501

Blimey!
Just the lens I was going to recommend.
That's a decent price BTW and the seller is a bricks and mortar shop that's quite famous in the UK.

As you don't need EF or IS the world's your Oyster really Marc.
Apart the Takumars there's:

Canon FD 200 or even 300 2.8 FDs

Olympus or Rollei glass - not an expert on the different FLs, but both companies produced excellent, flat - field lenses.

Nikon MF lenses as well but they might be a tich more expensive as they will still fit the digital bodies.

Leica lenses are likely to be pretty dear, but their colour correction is esentially perfect and they are almost too sharp.

That's all that spring to mind here.
G'luck!