Quote:
Originally Posted by jeelan
hey all,
I got my filters yesterday from DGM.
Now waiting for a clear night to use them.
ON the same note, what's the best way to look after these and clean them if i get finger marks, dust etc?
anyone got a preferred "solution" they use to clean/wipe astronomy filters?
cheers
Jeelan
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Hi Jeelan,
The DGM Filters are made by Omega Optical in the USA. They are Surface Coated filters and whilst the coatings are pretty durable you do need to exercise some care in handling them.
Omega Optical have an information page on their website which explains about their filters and how to clean them. They recommend their own cleaning kit and isopropyl alcohol. I don't know that you need their cleaning kit if you have an air blower bulb and some soft lint free cloth. I clean all my optics from rifle scopes to binoculars to camera lenses and eyepieces with an air blower bulb, soft lint free cloth and isopropyl alcohol. Basically blow all the loose dust away, wipe gently with an alcohol soaked patch and then wipe again with a dry patch in a sweeping lifting motion and the optic will dry streak free.
If you go to the wrong place isopropyl alcohol isn't cheap. If you go to the right place it's cheap as chips.
I paid about $18 plus $10 shipping for a 5 litre container of it from Sydney Solvents about 2 years ago.
I had previously sourced a 5 litre container of it gratus 20 years ago from a friend who owned a chemical distribution company but he retired. I did get about 18 years out of 5 litres of it.
Cheers,
John B