Free Access

Table 2

NAC and WAC filter names and wheel positions.

Position Wheel 1 Wheel 2 Wheel 1 Wheel 2

1 FFP_UV FFP_IR empty empty
2 FFP_Vis Orange Green Red
3 NFP_Vis Green UV 245 UV 375
4 Near-IR Blue CS CN
5 Ortho Far-UV UV 295 NH2
6 Fe2O3 Near-UV OH Na
7 IR Hydra UV 325 OI
8 Neutral Red NH Vis 610

Notes. Position of the two filter wheels of all filters for NAC and WAC. In principle, every combination is possible, but only some of them are useful for scientific purposes.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.