Pentax 6 x 7 lenses are cheap on ebay.
The best is the 300mm F4 EDIF lens which goes for about US$1000.
But its like a widefield telescope.
Cheaper is the Pentax 300mm 645 EDIF lens. I have that one and it performs really well.
Other 6 x 7 lenses that are good are:
165 F2.8 6 x 7
75mm F4.5 6 x 7
55mm F4 6x7.
They are fairly cheap.
There is also a 400mm F4 EDIF 6 x 7 but I think that is rarer.
Greg.
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