Downsizing my photography inventory and so selling my:
Canon PL-C 52mm Drop-in fitted with Singh Ray warming Circular Polarising Filter, fit Canon 300, 400, 500 and 600 mm lens. Complete with Canon case.
More information on this warming filter here:
https://singh-ray.com/shop/lb-lighter-brighter-warming-polarizer/
Little usage so as new condition.
Dispatch via insured RMSD.