I was surprised that these Stylus pens were so competitively priced and was not expecting great quality at this price. For once, I didn't regret buying a cheap item as the quality is excellent. The stylus pens look well made and the rubber tip is not flimsy for the price paid. it works well on my 7" Asus Memo Pad Tablet. A definite buy!!
Although, I read in the reviews that some users have experienced a purple colour cast, I have not noticed this in camera. Looks well made. Note you will need a 72 mm filter cap to protect the filter. The screw in fitting on the other side of the filter to the lens is 67mm as expected. However, I will do further processing with some of the images I took with Photoshop Elements. I will update if I notice any colour cast on the higher ND settings which can be removed in Elements anyway.