Will be getting the 300mm F2.6 L ens shortly, (been saving very hard!!!) but the Drop in filter is confusing me.
What is a gel filter, is it something that is left over from the 35mm days.
If I buy a Drop in Filters holder :
http://www.warehouseexpress.com …/default.aspx?sku=1002933![]()
can I buy the 52mm hoya ND and UV screw filder and screw to this holder?
Steve

