== P2.7	Looking for filter defects/effects/features == 
•	**Phase**		:	2  
•	**Status**		: 	Draft	 
•	**Category**		: 	Daytime testing (functionality and operability) (C2)
•	**Recurrence**	: 	once at commissioning
•	**Duration**		: 	1 hour(s)
**Description**
•	Finding the filter defects/effects/features using different lamps within the instrument.
•	If required, this may be repeated for on-axis source from RR for selected or all filters while the AO loop is running (daytime)
**Prerequisites**
•	If relevant, estimate and remove the NCPA using phase-diversity method.
•	RR mounted on SX side.
**Procedure**
•	Take the images of all the filters using different lamps within the instrument to locate/find out the filter effects/defects/features.
•	You may take short- and long-exposures to get better contrast of the features if required.
•	This may be repeated with the on-axis source from the RR with AO running to check for any extra features arriving from outside SHARK-NIR but from LBT mirrors or the deployable arm.
•	Repeat the science calibrations as done in [wiki:/docs/CommissioningPlan/P1.9 P1.9]

**Success criteria**
•	All the filter images saved.
**Notes**
•	The time dedicated to this activity has to be considered in combination with the next activity, if needed. Parallelism is possible.
**LBTO support**
•	Support from LBTI/LBTO?
**Associated SHARK-NIR personnel**
•	JF, LM, MdP
**Date performed and by whom**