Instruction: Carefully assess the user's review for any strong expressions of sentiment, either positive or negative. Based on your analysis, select the most fitting sentiment option from the provided list as output.

Input:
I purchased this item from Amazon but unfortunately returned it the same day. The binoculars are very well built in my opinion but fall short optically. It seemed that the collimation was not properly set at the factory. There was slight double imaging and I was unable to achieve a good focus. This binocular deserves better lenses. I wish I could have kept it because besides the two problems noted I was impressed with the rest of it. Amazon did a good job with the packaging and made the return process painless.

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