British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

Home Forums Spectroscopy
Terms of use

Lowspec3 development

1 post / 0 new
Anthony Rodda's picture
Last seen: 1 month 1 day ago
Joined: 01/09/2014 - 14:15
Lowspec3 development

Just a quickie to show the most recent incarnation.

A commercial 55mm lens in place of the 'standard' 30mm diameter doublet.  (Upper and lower covers removed for clarity).

Much better end-to-end focusing across the visible range.  This looks to be a marked improvement.

Look how much space it frees up inside the body of the spectrograph and underneath the body for additional automation fixtures.  The new SAS developed calibration 'injector' & lamp controls, focusers, grating motor, etc can now be added.