Filter characteristics

# Filter Slide / Pos	Filter		Size / Thickness [mm]	Type	λC / FWHM [nm](*)	Curve	Comments
#1 /p1	Johnson U		50x50/4	shortpass	365/60	--	UG1/1mm + BG40/3mm; short W/L/ cutoff defined by CCD
#1 /p2	Johnson B		50x50/4	bandpass	430/80	--	GG395/1mm + BG25/1mm + BG39/2mm
#1 /p3	Johnson V		50x50/4	bandpass	541.6/67.6	Plot	GG495/2mm + BG39/2mm, Roeser V
#1 /p4	Johnson R		50x50/4	bandpass	648.3/139.8	Plot	OG570/2mm + KG3/2mm, Cousins R
#1 /p5	Johnson I		50x50/3	longpass	846.1/241.7	Plot	RG9/3mm; long W/L cutoff defined by CCD

#2 /p1	H α (wide)		50x50/	interference	657.7/6.7	Plot
#2 /p2	SII continuum		50x50/	interference	700 / 40
#2 /p3	SII		50x50/	interference	673 / 8
#2 /p4	OIII		50x50/	interference	501 / 14
#2 /p5	OII		50x50/	interference	372 / 8		#two substrate composite
#3 /p1	H beta		50x50/	interference	486 / 6		not installed
#3 /p2
#4 /p1	G300		50x50/	transm. grating	-		grating only, not a grism, 300 grooves/mm, blazed for 600nm
--	Roeser BV		50x50/	bandpass	497.7/155.9	Plot	BG39/xmm ; long W/L cutoff defined by CCD
--	H α (wide)		50x50/	interference	656.7/8.4	Plot
--	Gunn z		50x50/	longpass	836.3	Plot	RG830/3mm ; long W/L cutoff defined by CCD
--	Gunn z		50x50/	longpass	840.8	Plot	RG830/3mm ; long W/L cutoff defined by CCD

(*) Given as Central Wavelength/Full? Width Half Maximum or cut-on wavelength only for longpass filters or cutoff for shortpass filters.

Long wavelength cut-off defined by CCD properties (~1050nm). Derived from actual measurements where transmission curve is linked, otherwise design values are given.