hello community I need your help to identify the characteristics and cost of the device. It cost me 4k. Took away for debts. inside is the inscription esa-nv. I understand that there is FOM 2000+ or 2376+. they also offer me to change to mikron-d ae. should I change 18 mm tubes to 16 mm, -20% by weight? almost all photos are in total darkness. thank you all for your replies, Slava Ukraini, God Bless America
