Image:Open-cluster-Messier-7.jpeg

维基百科，自由的百科全书

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Description	Open star cluster Messier 7 also called Ptolemy Cluster, photographed at La Palma, Roque de los Muchachos (Degollada de los Franceses). Photo taken the following equipement: Camera/Telecope: Pentax SDHF 500 6.7/500 on GP/DX, tracing ST4 at 600mm (Sonnar 4/300 with 2x tele converter) Exposure: 40 min Film: Kodak E200 35mm (Push to 600 ASA) Scanner: Scan service Processing: Removed vignetting, colour and contrast correction. additional remark: faintest object visible at 6.5 mag Deutsch: Der offene Sternhaufen Messier 7
Source	Homepage of Oliver Stein http://www.estelar.de/deepsky/kb_300_800mm/m7.htm
Date	Sept. 2004
Author	Oliver Stein
Permission	Quotation of the permission Oliver Stein gave me in a mail after my call at forum.astronomie.de for a GFDL-free release of astro photos: de (original): ich habe mich entschieden. Bitte die Bilder unter der GFDL einstellen. en (translated): I have decided. Please upload them under the GFDL. Full quote at User:Arnomane/Requests#Anfrage in forum.astronomie.de

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

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维基百科，自由的百科全书

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