Afocal stellar spectroscopy setup

Afocal stellar spectroscopy with RO-200 and SA-100 grating filters, Celestron XLT 150 Newton telescope, and Lumix LX3 camera

Afocal setup with Lumix-LX3, extension adapters and Plossl 25mm:

Diffraction grating filters (RO-200 or SA-100) are attached to afocal setup through a set of eyepiece extension rings. Disassembled Barlow unit is used as major extension adapter:

Completely assembled unit (spectroscope grating filter + extension rings + Plossl 25 + camera adapter + photo camera) is inserted into telescope focuser (Celestron XLT 150 Newton). Barlow barrel allows to rotate grating filters independently from camera to adjust appropriate spectrum direction for drift style photography:

Examples of stellar spectra through SA-100 (Aldebaran and Castor):

Examples of stellar spectra through RO-200 (Vega, Sirius and Betelgeuse):

Aldebaran spectrum SA-100 vs RO-200:

Capella spectrum SA-100 vs RO-200:

Pleiades through SA-100: