Task: Sentiment_Analysis
user: 

 You are a helpful assistant. The assistant first thinks about the reasoning process in the mind by using Belief-Desire-Intention (BDI) framework and then provides the user with the answer. The reasoning process and answer are enclosed within <think> </think> and <answer> </answer> tags, respectively.  /nFor the BDI reasoning process, (1) Based on the User Review, starting with "customer believes", list the user's beliefs; then, based on the User Review and the definition of Reiss's 16 basic desires theory, list the user's desires; next, based on the listed beliefs, desires and User Review, starting with "customer intends", list the intentions; (2) Finally, based on the generated beliefs, desires and intentions, construct logically BDI reasoning process, and select the correct answer based on the BDI reasoning process and input. /nThe definition of Reiss's 16 Basic Desires Theory: 1. Acceptance - the need to be appreciated 2. Curiosity, the need to gain knowledge 3. Eating, the need for food 4. Family, the need to take care of one’s offspring 5. Honor, the need to be faithful to the customary values of an individual’s ethnic group, family or clan 6. Idealism, the need for social justice 7. Independence, the need to be distinct and self-reliant 8. Order, the need for prepared, established, and conventional environments 9. Physical activity, the need for work out of the body 10. Power, the need for control of will 11. Romance, the need for mating or sex 12. Saving, the need to accumulate something 13. Social contact, the need for relationship with others 14. Social status, the need for social significance 15. Tranquility, the need to be secure and protected 16. Vengeance, the need to strike back against another person/nNow the user gives an instruction that describes a task and ask you write a response that appropriately completes the request. After thinking, when you finally reach a conclusion, clearly state the BDI thinking process within <think> </think> firstly and then the answer (i.e., answer only letters in options) within <answer> </answer> tags.
Instruction: Given the user's review, identify the user's sentiment from the listed options. Answer using one of the options.

Input:
User Review: You spent a lot of money for your SLR or digital SLR camera, and then you plunked down another large chunk of cash for a quality lens.  Do you really want to blow another heavy chunk of change for a basic, thread on UV filter?  Well, I would normally advise that you don't skimp on quality when it comes to filters.  After all, would you pay a premium price for a high performance automobile, only to fill it with watered down fuel?  I should nope not!  So is it such a bright idea to buy such a low cost UV filter for your high-end SLR lens?  Well, maybe it is if you are considering the Tiffen 77mm UV Protection Filter.

This filter does NOT offer the highest level of UV filtration, but it is rather sufficient for most conditions, and the build quality and materials used in this filter are very good.  For most digital SLR users, a UV filter is a must have for protecting your lens optics, and it helps to clear up the hazy and washed out look in many of your outdoor photos.  This filter has proven to clean up many of my digital photographs, and I have found almost no internal reflection artifacts.  Notice I said ALMOST no internal reflection.  I leave my UV filters on all of my lenses almost all of the time, and this filter has produced some minor reflection when shooting indoor photos with my Sigma 10-20mm ultra-wide angle lens.  This seems to only happen when shooting in dim lighting conditions, and when aiming the lens in the direction of a strong light source, such as a table lamp.  Since my Canon EOS 40D has a "Live View" feature that lets me see what the picture is going to look like (displayed on the 3" LCD), I can see the reflection artifacts before I shoot the picture, and therefore have found ways to reframe my shots to avoid the reflections.  However, I recommend that you simply remove the UV filter when shooting in these conditions.

As I said before, I typically do not recommend buying low cost filters for your high quality lenses, but I prefer to invest my money on creative filters and not pour too much into a filter that is primarily used to simply protect the front of the lens.  Many manufacturers, including Tiffen, offer higher quality UV/Haze filters for SLR lenses, and you may wish to spend the extra money if you are looking for deeper UV removal from your pictures.  However, if you are looking for great lens protection and a decent level of UV filtration for a modest investment, you honestly can't go wrong with this filter.  Just remember to remove the filter, or frame your shots carefully when shooting in situations where direct light reflection may be an issue.

Quality = **** (4)
UV Filtration = **** (4)
Value = ***** (5)

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


<think>
Answer: B: positive