Derogy aplanat n7 - 680mm f8

Here a pretty rare lens : a derogy aplanat number 7.

With its 680mm focal lenght it was designed to cover up to 40x50cm at infinity … so even more for close focus works.

Lens is in beautiful condition. Please note peripherical balsam separation on rear group. Could be repaired but lens is perfectly usable as is.

With original flange, ready to use.

Please note you’re buying 100 to 150 years old items. Patina, scratches on barell etc. are signs of their previous lifes. I try to be as precise as possible so feel free to ask more picture (daylight pictures for example) via messenger or mail