Does anyone know if the Nikon DK-20C Correction Eyepiece for Rectangular-Style Viewfinder which B and H lists as compatible with: D750, D610, D600, D5300, D5200, D5100, D5000, D7100, D7000, D3300, D3200, D3100, D3000, D300, D300S, D200, D100, D90, D80, D70, D60, D50, D40, N80, N75, N70, N65, N60, N55, N50, Pronea, N2-4-5-6000 Series & FM/FE10 Cameras is the same as the old model that was for the Nikon FG/EM and fits the OM 1 and OM 2 viewfinder perfectly? From the photos it looks the same but I can't tell if the size matches. I need another one (for another body) and the sellers seem to be out of my power (-3).