Instruction: Assess the user's sentiment in the provided review and select the appropriate sentiment option from the list as the answer.

Input:
A very good lens, gives sharp images. Can focus at a 1:1 magnification, so for a full frame 35mm sensor (like the Canon 5D) a 24x36 field of view fills the frame.

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