Hi,
I read a bit, and search for more topics, but still didn't get that answer.
How to recognize a Petzval B&L ?
Have you any advices?
Hi,
I read a bit, and search for more topics, but still didn't get that answer.
How to recognize a Petzval B&L ?
Have you any advices?
Hi,
I read a bit, and search for more topics, but still didn't get that answer.
How to recognize a Petzval B&L ?
Have you any advices?
They usually have a black band right behind the hood, as seen here. Some Wollensaks also have that band though. They always have a short hood, and the knurling on the knobs is usually the same. I'll look for a better picture of the knob.
Garrett
flickr galleries
Thanks for that answer
How many lenses to compose a Petzval? Four right?
And if any lenses are missing? But sell as a Petzval
Generally a B&L Petzval can be demounted, not cimented, and all lenses can be clean separately?
The same way you recognizee any Petzval. Cemented pair up front. Two elements air spaced in the rear. Read http://antiquecameras.net/petzvallens.html
Good luck
Dan
Antique & Classic Camera Blog
www.antiquecameras.net/blog.html
A petzval has two separate lenses in the rear, and two cemented (glued) together in the front.
Garrett
flickr galleries
Garrett's advice is a good starting point, but I have a 15" Bausch & Lomb projection Petzval that is all black (with a serial number around the 1,000,000 mark). I bought it online and had no way of knowing what the configuration was until it arrived. Fortunately, it turned out to be as advertised:
I also have a number of B&L "Cinephor" projection lenses that are Petzvals, as well as a few labeled "Cinephor" that are not. It can be very confusing.
Jonathan
But you can't open what you buy.
That's why i asked if there was a way to know, externally.
Dates, First part like this, knob like that, etc etc...
Yes, i don't know how to recognize the B&L projection lenses petzval or not;
And the black ones seems to be petzval most of the time, but how to be sure...
This is Petzval?
http://www.ebay.com/itm/Antique-pate...vip=true&rt=nc
http://www.ebay.com/itm/Antique-pate...p2047675.l2557
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