N.J. Opsahl
Street address: Holbergsg. 4
3722 Skien

Mailing address: Postboks 120, 3701 Skien
Phone: 35 52 25 31
Fax: 35 52 25 53
Email: salg@njopsahl.no
Webpage: http://www.njopsahl.no/

Teno Astro AS

Main office:
Industriveien 8 B
6501 Kristiansund N
Phone: 71 56 57 10
Fax: 71 56 57 11

Exhibition, demo and sales office:
Munkedamsveien 65 B
0270 Oslo
Phone: 22 83 85 20
Fax: 71 56 57 10

Webpage: http://www.tenoastro.no/

Email: teno@tenoastro.no

Celesta Optikk AS
Kemiveien 3,
9011 Tromsø

Email: salg@celesta.no
Phone: 971 61173

Webpage: http://www.celesta.no/

Sunspotters (for optical use)
Information about sunspotters:
http://www.planetarium.se/Sunspotter.htm
http://www.starlab.com/ltiprod.html
Scandinavian store: Per Broman
Email: pbr@planetarium.se