Can anyone with a TQ1,2,or 3, confirm that the large barrel lens has a diameter of 52.5mm.
You are correct Robert, I've just bought another stepping ring for my B&H, it is 52mm thread to fit the std prime lens for a Kowa 'scope
lens. I have the 1'' lens that is Taylor Hobson f1.9, small barrel, but sleeved for B&H, I have a spare 2'' f1.4 if you need it gratis.
The shorter focal length are harder to come by, I paid about £100.00 for mine years ago, they sometimes have them on ebay USA.
I have just secured a 1" wide barrel lens, so will be nice to view all my films again with more light. I haven't been that impressed with the Taylor Hobson lenses; I thought the standard 2 inch lens gave a sharper image, just needed something to give a larger picture.