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Petri Automatic 1:2. f=55 mm 7 elements??
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PostPosted: Wed Sep 11, 2019 12:41 pm    Post subject: Reply with quote

The follow petri lens has the 7 elements formula?

Petri Automatic 1:2. f=55 mm
No. 168246 Petri Camera Co. Ind.

IT cames with a Petriflex V

Thank you


PostPosted: Wed Sep 11, 2019 7:47 pm    Post subject: Reply with quote

Not likely, but likely it is radioactive judging from the yellowing of this sample: https://www.facebook.com/pg/Vintage-lens-lover-Malaysia-1059060870817322/photos/?tab=album&album_id=1573503702706367


PostPosted: Wed Sep 11, 2019 9:24 pm    Post subject: Reply with quote

This website (Japanese) has some excellent information if you use Chromes automatic translation feature, including diagrams of most of their lenses:

https://w.atwiki.jp/petri/

The 55/1.8 which is thought to be basically the same design is here:

https://img.atwikiimg.com/www52.atwiki.jp/petri/attach/308/1705/img206.jpg