Pupil imaging with N05340 versus N04679

We would like to leave the N04679-4 filter out for the next flight series because we were not scheduled for lineops. However its also been the default choice for pupil viewing. Is N05340 a substitute?

We observed the room, using a 256 row subarray, frame time=1.0s and the customary aperture of slit7 x 35 deg decker.

Pupil taken with N04679 (left) and N05340 (right). The dark line is nothing important (a shiny handle on the rolling cabinet that happened to be in front of the window.) 

Here's a horizontal crosscut :

Average count values per pixel in a horizontal cross cut of the first figure. The 1% non-linearity level is the dotted line. 

The flux levels in the single D are almost too much to manage, but will be much better if we look at the retro mirror or the secondary mirror. In short, this is good enough for alignment and pupil checking purposes, and we have the ability to change the frame time or aperture size.