-The LPS-V4 utilizes the IDAS's own technology called MBT (Multi Band-pass Technology), and is a high performance, semi-narrow-band pass filter intended for for nebulae observations.
-The LPS-V4 has succeeded the most of the visible spectrum characteristics of its predecessor LPS-V3, and further enhanced the suppression of the IR region. LPS-V4's IR suppression characteristics are almost on par with UIBAR-III's.
-When used in combination with either R-60 or R-64, the LPS-V4 can be used as an H-alpha band pass filter having a half-value bandwidth of 20 to 25nm.
The conventional narrow-band nebula filters have been designed in taking into consideration, O-III and H-beta factors only. The LPS-V4, however, is designed with somewhat a little wider bandwidth in order to pass C2 coma, H-alpha and N-II as much as possible.
With the use of the LPS-V4 in combination regardless with cooled CCD's, DSLR's, silver salt film cameras or naked-eye observations, you can shoot and observe blue-green coma of planetary nebulae, diffuse emission nebulae and comets at a high contrast.