A possible design option is to combine SHOC and SPRAT into one instrument. The following
describes some testing of this concept on the Liverpool Telescope (LT) version of SPRAT.
=== Wavelength Range ===
On the afternoon of 2017 12 17 the 85mm f/1.8 Nikon camera lens
meets the design requirement to cover one full octave.
=== Optical Quality === Comparisons of the extracted arcs using either lens show essentially identical opticalquality: [[File:sprat-comp-1.png|thumbnail]] [[File:sprat-comp-2.png]] The 50mm lens version looks slightly softer in images, but remember the pixelsampling is half what it would be using the SHOK camera, so its not reallya fair comparison. [[File:image-comp.png]]