afesan Posted July 24, 2015 Report Share Posted July 24, 2015 vdB 136..an orange-yellow reflection nebula.. After a year ..I finally decided to clean the mirrors of the ASA N12 astrograph. Having a remote observatory is a great chance for astrophotography, but the wild forest environment..., dust, insects and pollen... are sure dirty deposits for any telescope mirror. Time to clean with distilled water and an special cleaning liquid soap... . Here is my mate observatory who helped me: http://afesan.es/new-page-4.htm After that, the telescope need a recollimation and this is the first image and test.... I hope you like it: More resolution,target general information and acquisition details: http://afesan.es/Deepspace/slides/vdB%20136%2CLBN%20312%20%28Cygnus%29.html Thanks for looking. Enjoy summer Link to comment Share on other sites More sharing options...
MarkS Posted July 25, 2015 Report Share Posted July 25, 2015 Hi Antonio, Cleaning the mirror I have found a bit scary - but worth it Nice image - what causes the yellow? Mark Link to comment Share on other sites More sharing options...
rbrecher Posted July 25, 2015 Report Share Posted July 25, 2015 Looks like the collimation is perfect! Great image. I will be cleaning and recommitting when the moon becomes full in a few days... Clear skies, Ron Link to comment Share on other sites More sharing options...
ChristerS Posted July 25, 2015 Report Share Posted July 25, 2015 Hi! Nice image Antonio! What special cleaning liquid soap did you use? I need to clean in the near future. And what tools for collimation? I have had problem getting good collimation in one corner of the field, I use the Glatter laser for the secondary mirror and Catseye InfinityX for the primary, placed at the OTA focus plane using 3" extensions rings on the OK3 fokuser. I dont see so much discussion about collimation in the forum, is it not a big issue or is it just me who cant get it perfect Regards, /Christer Link to comment Share on other sites More sharing options...
afesan Posted July 27, 2015 Author Report Share Posted July 27, 2015 (edited) Well... the "special" cleaning soap is a simply liquid dishwasher soap. In Spain is well-known as "Mistol" and very popular in any supermarket. Many of us clean here our mirrors with this one and distilled water. Just clean carefully your hands with this soap...and wet the mirror with a lo of water.Let the mirror wet for some minutes in order to "loose" the dirty. Then add some drops of liquid soap to the water and clean softly with the yolk fingers and circular movements ..veryyy softly from the center to the borders. Repeat this operation 2-3 times...FInally clear with al lot of distilled water.Let dry the mirror into vertical position .. This liquid soap leaves no residue of any class and don´t damage the mirrors.. http://www.mistol.es/es/inicio.cky.html Collimation was simply done with a first approximation using a laser collimator from ASA ( BTW: I did not see this laser into ASA products lately)..Then my observatory mate and me did several coliimation approaches with the Telecat and Infinty tools from Catseye http://www.catseyecollimation.com/ until we were very close to what we consider "perfection". Finally with real stars we made marginal minor adjusting .. Hopes this helps Antonio Edited July 27, 2015 by afesan Link to comment Share on other sites More sharing options...
MarkS Posted July 27, 2015 Report Share Posted July 27, 2015 I have used the procedure recommended by ASA for their RC telescope mirrors. It worked well. You can download the procedure from the ASA website. Before starting I remove loose dut and dirt with a Visible Dust camera sensor brush. I found it is critical to use a 'pure' detergent (ie no perfumes, hand softeners etc) and not too much, otherwise its very difficult to remove all streaking. And to do LOTS of rinses! A spray with superclean (ie no solids) IPA can certainly help remove the rinse water after cleaning, as it breaks down the surface tension. If it is pure it leaves no trace. For collimation, I use the Glatter laser (as supplied by ASA or obtainable direct), and Tublug for initial set-up and checking after travel, and Catseye Infinity for fine tuning. Mark Link to comment Share on other sites More sharing options...
tommy_h Posted July 28, 2015 Report Share Posted July 28, 2015 Hi Antonio Great image! Beautiful colors and nice details Thomas Link to comment Share on other sites More sharing options...
afesan Posted July 29, 2015 Author Report Share Posted July 29, 2015 Hi Antonio Great image! Beautiful colors and nice details Thomas Link to comment Share on other sites More sharing options...
afesan Posted July 29, 2015 Author Report Share Posted July 29, 2015 Many thanks, Thomas ! Link to comment Share on other sites More sharing options...
astrosirius Posted July 30, 2015 Report Share Posted July 30, 2015 Well done Antonio, I liked very much! Superb is a Stunning image! The colour calibration is perfect, as well as the noise reductions is well done. Congratulations. See you soon! Luis Romero https://www.flickr.com/photos/llromero/ http://www.astrosirius.org/ Link to comment Share on other sites More sharing options...
afesan Posted July 30, 2015 Author Report Share Posted July 30, 2015 Glad you like it, Luis !... We´ll see soon...sure. Clear skies ! Antonio Link to comment Share on other sites More sharing options...
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