Takumar 50mm f1.4 is one of the very best vintage lenses. Here's a review of the four M42 versions.
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Super-Takumar 50mm f1.4. Is the famous 8 elements lens measurably better than the 7 elements lens?
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Takumar 55mm lenses. A guide to one of the best - and most eclectic - series of vintage M42 lenses.
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Pentax Super-Takumar 50mm f/1.4 (8-element version) Lens Review
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The most underrated vintage lenses | Pentax Super Takumar
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8 Element VS 7 Element - TAKUMAR 50mm F/1.4
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Pentax Super-Takumar 50mm f/1.4: Do I have the 'Zeiss Planar Killer'?
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these vintage lenses are a DREAM - Pentax Super Takumars
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