Goodman spectrograph typical focus values

See how to perform a spectroscopic focus measurement.

See how to perform an imaging focus measurement.

The folowing values are approximate and can change up to 500 units from run to run.
We recomend that you perform a focus sequence at the start of your run or even every afternoon.

Red Camera spectroscopic focus values:

Grating Mode Camera
Temp (C)
Focus
400 M1 16 -600
400 (+GG455) M2 16 -1200
600 UV 18 -400
600 Blue 18 -300
600 (+GG385) Mid 18 -1100
600 (+GG495) Red 18 -400
1200 M2 17 -700
       
       

 

Blue Camera spectroscopic focus values:

Grating Mode Camera
Temp (C)
Focus
400 M1    
400 (+GG455) M2    
600 UV 17 1650
600 Blue 17 1650
600 (+GG385) Mid 17 820
600 (+GG495) Red 17 1650