Amazon are selling the dreaded screw in eyepiece filter marked “Sun” for £12.99. I haven’t seen these dangerous so called filters since the 1970’s. Spread the word these are highly dangerous, can shatter and cause blindness for any unsuspecting user. If you have a Twitter account/Facebook account, please post a warning. I’ve informed Amazon but whether they will take any notice is another matter. Patrick Moore used to say the best place for this type of filter was in the dustbin and he was absolutely right.