Astro mod service

[msacco]

Hey, I have a Canon 6D that I bought and was quite badly astro modified by whoever I bought it from, and I'm thinking of perhaps sending it to a proper astro mod service to have it done properly.

The current issues are:
1. The sensor has lots of dust specks.
2. I can't reach focus with some lenses.

The astro mod was done with the Baader BCF2 Astro Conversion Filter For Canon EOS, so I'm not sure whether this filter can be reused and cut some costs or needs to be replaced regardless, in case anyone might know, it would be great.

I'm basically looking for recommendations in all of Europe, I live in the Middle East so I guess there's no specific country, I'll decide by good service recommendations, cost, and shipping costs probably.
Would love to hear some suggestions in case you might know.

Thanks

[wimvb]

Have you seen this?

 

[Vroobel]

Hi. 

I modified my EOS 6D there:

http://www.astronomiser.co.uk/filters.htm

I'm happy and you can see result here: