Instruction: Analyze the user's review text and determine the overall sentiment expressed, then choose the corresponding sentiment option from the provided list (A: very positive, B: positive, C: neutral, D: negative, E: very negative) based on the identified sentiment.

Input:
This filter is basically unusable on my Nikon D90/18-105mm. The polarizing effect is weak, actually lowers contrast, and adds a bit of blur (photos are not sharp). I own other (older) Tiffen filters, and have never been disappointed until now.

Options:
A: very positive
B: positive
C: neutral
D: negative
E: very negative
Answer: E: very negative