Here is what I have added to the UV Sticky Part Two.
Please comment on any errors or needed corrections.
ADDED: I have edited this thread to keep it relevant. Thank you for your understanding.
And I have added an important note to the Petri entry for the Sticky.
It is in red below.
The Petri Camera Company was also known as the Kuribayashi Camera Industry.
Early Petri lenses were made mostly by Kyoei in an M42 mount. Next came the Petri breechlock mount lenses which were made by various manufacturers until about 1974. Petri returned to the M42 mount for about 3 years before switching to a Pentax mount for a short time until they got out of the camera business.
PLEASE NOTE: Given the different manufacturers of Petri lenses, we need to be aware of the possibility that not all Petris of the same focal length and speed will test the same for UV-capability. Some manufacturers may have added coatings or slightly altered the construction or design of a Petri. So readers should understand that the following comments apply only to the specific lens tested by that person.
- 35mm f/3.5 Does very well in UV if stopped down to f/8 or more. Focus shift is small. 46mm threads. Breechlock mount. /nfoto/
- 35mm f/3.5 Does very well in UV if stopped down to f/8 or more. Focus shift is small. 46mm threads. M42 mount. May be branded Kyoei Acall or Kuribayashi. /Infraultra/
- 135mm f/3.5 A good all-round UV performer if stopped down to f/8 or more. Focus shift is significant, so use Live View with a UV torch to assist focusing. 52mm threads. Breechlock mount. /nfoto/
- 200mm f/4.0 A good all-round UV performer if stopped down to f/11 or more. Focus shift is significant so use Live View with a UV torch to assist focusing. 55mm threads. Breechlock mount. /nfoto/
- 400mm f/6.3 Can be OK for UV stopped down past f/11. Live View with UV torch. Breechlock mount. /nfoto/