42mm screw lenses

<h2 data-rte-spaces-before="1" data-rte-spaces-after="1"> <a data-rte-meta="%7B%22type%22%3A%22internal%22%2C%22text%22%3A%22Pentax%22%2C%22link%22%3A%22Pentax%22%2C%22wasblank%22%3Atrue%2C%22noforce%22%3Atrue%2C%22wikitext%22%3A%22%5B%5BPentax%5D%5D%22%7D" data-rte-instance="211208-5692842245f07921be88eb" href="/wiki/Pentax" title="Pentax">Pentax</a> </h2>
<p data-rte-fromparser="true"><a data-rte-meta="%7B%22type%22%3A%22internal%22%2C%22text%22%3A%22Pentax%22%2C%22link%22%3A%22Pentax%22%2C%22wasblank%22%3Atrue%2C%22noforce%22%3Atrue%2C%22wikitext%22%3A%22%5B%5BPentax%5D%5D%22%7D" data-rte-instance="211208-5692842245f07921be88eb" href="/wiki/Pentax" title="Pentax">Pentax</a> made the widest line of M42 lenses under the name of <b>Takumar</b>. There are 4 types of these lenses, listed in chronological order:
</p>
<ul><li data-rte-spaces-before="1">type 0: Takumar (preset: Succeeds the older 37mm version of the Takumar
</li><li data-rte-spaces-before="1">type I: Auto-Takumar: A lever is added to allow for full aperture focusing
</li><li data-rte-spaces-before="1">type II: Super-Takumar: Fully-automatic diaphragm that does not needs to be cocked manually, single layer of coating, however some rare later versions are multi coated
</li><li data-rte-spaces-before="1">type III: Super-Multi-Coated Takumar: Extra pin for open aperture metering with the Spotmatic-F/ES/ES-II, super multi coated, maybe the best coating at the time developed by Asahi Opt. Co. for the small windows of Gemini spacecraft; S.M.C. is the same technology of the T* of Carl Zeiss W.G.
</li><li data-rte-spaces-before="1">type IV: SMC Takumar: newer version that uses a rubberized instead of the metal focusing ring
</li></ul>
<p data-rte-fromparser="true" data-rte-empty-lines-before="1">The lenses are listed, with the types known to exist for sure:
</p>
<table>

<tr valign="top" data-rte-attribs="valign=top" data-rte-empty-lines-before="1">
<td>
<ul><li data-rte-spaces-before="1">15/3.5 (III, IV)
</li><li data-rte-spaces-before="1">17/4 Fisheye (II, III, IV)
</li><li data-rte-spaces-before="1">18/11 Fisheye (II)
</li><li data-rte-spaces-before="1">20/4.5 (II, III)
</li><li data-rte-spaces-before="1">24/3.5 (II, III)
</li><li data-rte-spaces-before="1">28/3.5 (II, III)
</li><li data-rte-spaces-before="1">35/2 (II, III)
</li><li data-rte-spaces-before="1">35/2.3 (I)
</li><li data-rte-spaces-before="1">35/3.5 (I, II, III)
</li><li data-rte-spaces-before="1">35/4 (0)
</li><li data-rte-spaces-before="1">50/1.4 (II, III, IV)
</li></ul>
</td><td>
<ul><li data-rte-spaces-before="1">50/1.8 (I, II, III)
</li><li data-rte-spaces-before="1">50/3.5 (0)
</li><li data-rte-spaces-before="1">50/4 Macro (II, III, IV)
</li><li data-rte-spaces-before="1">55/1.8 (0, I, II, III, IV)
</li><li data-rte-spaces-before="1">55/2 (0, I, II, III, IV)
</li><li data-rte-spaces-before="1">55/2.2 (0, I)
</li><li data-rte-spaces-before="1">58/2 (0)
</li><li data-rte-spaces-before="1">58/2.4 (0)
</li><li data-rte-spaces-before="1">83/1.9 (0)
</li><li data-rte-spaces-before="1">85/1.8 (I, III)
</li><li data-rte-spaces-before="1">85/1.9 (II)
</li></ul>
</td><td>
<ul><li data-rte-spaces-before="1">100/2 (0)
</li><li data-rte-spaces-before="1">100/3.5 (0)
</li><li data-rte-spaces-before="1">100/4 Bellows (0, III)
</li><li data-rte-spaces-before="1">100/4 Macro (IV)
</li><li data-rte-spaces-before="1">105/2.8 (0, I, II, III)
</li><li data-rte-spaces-before="1">108/2.8 Index (III)
</li><li data-rte-spaces-before="1">120/2.8 (III)
</li><li data-rte-spaces-before="1">135/2.5 5 elements/5 groups (II, III)
</li><li data-rte-spaces-before="1">135/2.5 6 elements/6groups (III)
</li><li data-rte-spaces-before="1">135/3.5 (0, I, II, III)
</li><li data-rte-spaces-before="1">150/4 (II, III)
</li><li data-rte-spaces-before="1">200/3.5 (0)
</li></ul>
</td><td>
<ul><li data-rte-spaces-before="1">200/4 (II, III)
</li><li data-rte-spaces-before="1">200/5.6 Tele (II)
</li><li data-rte-spaces-before="1">300/4 (0, II, III)
</li><li data-rte-spaces-before="1">300/6.3 Tele (II)
</li><li data-rte-spaces-before="1">400/5.6 (II, III)
</li><li data-rte-spaces-before="1">500/4.5 (0, II, III)
</li><li data-rte-spaces-before="1">500/5 (0)
</li><li data-rte-spaces-before="1">1000/8 (0, III)
</li></ul>
<ul data-rte-empty-lines-before="1"><li data-rte-spaces-before="1">70-150/4.5 (II, III)
</li><li data-rte-spaces-before="1">85-210 (II, III)
</li></ul>
</td></tr></table>
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