Hi
I have found some lenses and really don't know much about them.
One is with the engraving Darlot Opticien Paris (it is huge and heavy).
The other one is a portrait lens, possibly by Darlot, since it was made in France.
And a B+W Schneider filter with a brass filter claim/holder ring (what mounting is this?).

I don't know anything about large format camera lenses, so if you know anything about those lenses and filter, please tell me.

Here is the link to the photo: http://www.flickr.com/photos/34415912@N08/

Thank you so much!