Red Valerian

I am using a Nikon 75-150mm f/3.5 series E zoom lens on a Nikon D2Xs, which gives an angle of view quite a bit longer than the range on a full-frame camera. Notwithstanding that it must be focussed manually, it represents a bargain for its optical excellence - mine cost £31. Where else can you get 150mm at f/3.5 for such a small sum? With this lens plus a 35-70mm and a 20mm I should be ready for anything when the sun shines again.
I have substituted a magnifying eyepiece for the original on the D2Xs. It makes what I see 1.2 times bigger. This is very good for focussing. It is called a Nikon DK-17M. I ought to have bought one years ago.