This is for a 240mm f:9 to f:128 APO-Nikkor in barrel with filter drawer . Mounting flange is permanently mounted and has screws and nuts. Could use a good dust cleaning . Clear lens , no scatches, fungus or mold I could see. Comes with front and rear dust covers. 2" diameter rear threads Covers 8x10 This is a nice smaller light lens and would be great for enlarging or taking . Price $175 Shipping $14 US includes insurance . As with every thing I sell, this is being sold AS IS. I am retiring from photography and am selling off a 25 year old pile .. I will ship overseas but email me for a shipping quote. John Cremati firstname.lastname@example.org My email is my Pay Pal ID.