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| Pentax SLR Lens Discussion Discuss any Pentax K-mount, screwmount, or medium format SLR lens, as well as filters and attachments. |
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| 09-26-2008, 08:55 AM | #1 |
| Site Supporter Location: West Virginia Gallery Photos:
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Posts: 335 | Extender Curiosity I came upon the M42 Helicoid below marked 'VARIABLE CLOSE-UP RING', a marking I had not seen before and which I cannot locate in my old PTX catalogs. Annyone have any info on this? I would guess it is later than the 'Helicoid' nomenclature. They are identical otherwise. Just wonderin'............ |
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