Hi Suvendra, with infrared photography you will find that you need to overexpose slightly, from the settings above you would do better using a longer shutter speed - something like 4 seconds. Plus bring your ISO down to 100 otherwise you will get a lot of noise in the darker areas of your image. Did you pre-set your whiebalance or did you use auto, also what filter are you using.

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Nikon User
Beacon Images