Rodenstock 90mm Grandagon-N private labeled for Calumet as the Caltar II-N, multicoated, Copal 1 shutter, 236mm image circle, 105°, NEAR MINT, FLAWLESS glass, perfect working condition, ships with two caps and retaining ring. Note, the image coverage on the Grandagon series is so even, you will rarely (if ever), need center filters.