Links og programmer

Visual Spec
Spectrum software
Get it here: http://www.astrosurf.com/vdesnoux/

IRIS - verdens bedste program til astrofoto og analyse
Get it here: http://www.astrosurf.com/buil/us/iris/iris.htm

Tilting Sun
Get it here: http://www.atoptics.co.uk/tiltsun.htm

WinJUPOS
Get it here: http://www.grischa-hahn.homepage.t-online.de/astro/winjupos/index.htm

Fredrick Veio's 119 pages book "The Spectrohelioscope "
Get it here: http://www.eyes-on-the-skies.org/shs/spectro_helioscope.pdf
Additional pages - Get it here: http://www.spectrohelioscope.net/AdditionalPages.pdf

All about gratings
Get it here: http://gratings.newport.com/library/handbook4/handbook.asp

Robin Leadbeater's great homepage
Go there: http://www.threehillsobservatory.co.uk/astro/astro.htm

Shelayk Instruments  http://www.shelyak.com/

Philippe Rousselle fantastic site about Solar observations, spektroheliograph.
You have to look http://www.astrosurf.com/spectrohelio/index-en.php

Maurice Gavin homepage: http://www.astroman.fsnet.co.uk/