MODS Camera Filters

Updated: 2011 Jan 15 by R. Pogge (OSU Astronomy)

Science Camera Filters are located in the red and blue cameras in 8-position selector wheels. The filters lie between the camera primary mirror and the field-flattener/dewar window.

AGw Guide Camera filters are in front of the guide camera CCD and do not affect light entering the off-axis WFS camera.

Filters may be selected by filterID (preferred) or by position number (deprecated) (e.g., "red filter r_sdss" or "red filter 2").

transmission curves etc. coming soon

MODS1

Blue Science Camera

Pos	filterID	Description	Use Notes
1	Clear	Fused Silica Clear 128x86x6mm Nr1	General Spectroscopic Filter
2	g_sdss	Barr SDSS g 86x86mm	Imaging
3
4
5	UG5	Omega UG5+FS 128x86x6mm Nr1	UV Spectral Flats and Hg(Ar) Comp Lamps
6	u_sdss	Barr SDSS u 86x86mm	Imaging
7	ND1.5	Omega ND1.5 128x86x6mm Nr132111	Spectral Flats and Bright Comparison Lamps
8

Red Science Camera

Pos	filterID	Description	Use Notes
1	Clear	BK7 Clear 128x86x6mm Nr1	General Spectroscopic Filter
2	r_sdss	Barr SDSS r 86x86mm	Imaging
3
4	i_sdss	Barr SDSS i 86x86mm	Imaging
5	GG495	JML GG495 128x86x6mm Nr1	Red-Only Spectral 2nd Order Blocker
6	z_sdss	Barr SDSS z 86x86mm	Imaging
7	ND1.5	Omega ND1.5 128x86x6mm Nr130605	Spectral Flats and Bright Comparison Lamps
8

AGw Guide Camera Filters

Pos	filterID	Description	Use Notes
1	Clear	Edmund Clear Fused Silica 50x5mm	General Guiding
2	F525LP	Edmund 525nm Long-Pass Yellow 50x5mm	Bright Moonlight or very red stars
3	B_Bessel	Optec Bessel B 50x5mm	Blue guide stars or UV spectra in blue-only mode
4	ND1.0	Edmund Neutral Density 1.0 50x5mm	Bright Telescope Pointing Stars

MODS2

Blue Science Camera

Pos	filterID	Description	Use Notes
1	Clear	Fused Silica Clear 128x86x6mm Nr2	General Spectroscopic Filter
2	g_sdss	Asahi SDSS g 86x86mm	Imaging
3
4
5	UG5	Omega UG5+FS 128x86x6mm Nr2	UV Spectral Flats and Hg(Ar) Comp Lamps
6	u_sdss	Asahi SDSS u 86x86mm	Imaging
7	ND1.5	Omega ND1.5 128x86x6mm Nr......	Spectral Flats and Bright Comparison Lamps
8

Red Science Camera

Pos	filterID	Description	Use Note
1	Clear	BK7 Clear 128x86x6mm Nr2	General Spectroscopic Filter
2	r_sdss	Asahi SDSS r 86x86mm	Imaging
3
4	i_sdss	Asahi SDSS i 86x86mm	Imaging
5	GG495	JML GG495 128x86x6mm Nr2	Red-Only Spectral 2nd Order Blocker
6	z_sdss	Asahi SDSS z 86x86mm	Imaging
7	ND1.5	Omega ND1.5 128x86x6mm Nr......	Spectral Flats and Bright Comparison Lamps
8

AGw Guide Camera Filters

Pos	filterID	Description	Use Notes
1	Clear	Edmund Clear Fused Silica 50x5mm	General Guiding
2	F525LP	Edmund 525nm Long-Pass Yellow 50x5mm	Bright Moonlight or very red stars
3	B_Bessel	Optec Bessel B 50x5mm	Blue guide stars or UV spectra in blue-only mode
4	ND1.0	Edmund Neutral Density 1.0 50x5mm	Bright Telescope Pointing Stars

-- RichardPogge - 16 Jan 2011