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General :
Observations :

 

Imaging: Filters and Objectives

Filters

  Wheel 1        Wheel 2    
Pos. Name Central wavelength (µm) Width (µm) Width(%) Name Central wavelength (µm)  Width (µm) Width (%)
1  Open        NB 2.28 2.280  0.030  1.4
2   NB 2.19 2.195  0.03  1.37   NB CO  2.336  0.03  1.32 
3  NB 2.09 2.09  0.02  0.96  F ocus wedge       
4   NB 1.19 1.187  0.01  0.84  Open       
5   NB 1.06 1.061  0.01  0.94  NB HeI J 1.083  0.0164  1.48 
6  Closed         NB 1.21 1.215  0.018  1.5 
7  Z  0.9  0.14  16  NB Fe[II] J 1.257  0.019  1.48 
8  GBF  0.925  cut-on       NBPbeta 1.282  0.019  1.5 
9  GRF  1.424  cut-on     NB[FeII]H 1.644  0.025  1.52 
10  Empty         NB1.71 1.71  0.026  1.52 
11   J 1.247  0.290  23  Closed       
12  H 1.653  0.297  18  NB HeI K  2.059  0.028  1.36 
13  Ks  2.162  0.275  13  NB H2 S1 2.124  0.028  1.32 
14          NB Brgamma  2.167  0.028  1.29 
15          NB 2.25 2.248  0.03  1.3 
Table 1. SOFI filters.

 

Objectives

Name Field (arcmin)  Scale (arcsec/pixel) 
Large Field (LF) 4.9 x 4.9 0.288
Small Field (SF) / LF + Focal Elong. (FE) 2.4 x 2.4  0.144 
Spectroscopic Objective (SO) 4.5 x 4.5  0.273 
High Resolution (HR) 1.2 x 1.2 0.072

Table 2. SOFI Imaging modes.

The Image Quality of SOFI can be checked here

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Last Update: April 26, 2002 (Leo Vanzi)		 [ESO][ESO][ESO][Search][Help][News]