www.astrocafe.hk

由於本身的干涉濾鏡特性，LPS濾鏡是不適用於100mm焦距以下的鏡頭的 (135全片幅)，但IDAS最近會推出鏡後濾鏡，將可照顧廣角鏡甚至魚眼鏡了，敬請密切留意：

http://digiborg.wordpress.com/2011/04/2 ... -filter-2/

Really a good news! It solved full film DSLR problem that 5D or 5D II etc have no filters. But I guess IDAS needs to produce both Nikon & Canon rear filter holders, as many people use Nikon lens on Canon body.