Just finished a 3 hour scope cleaning session:
- All metal parts were gently scrapped with a microfiber cloth with isopropyl alcohol (IPA 99%). As the scope had been in storage inside a car garage, all grit came out nicely and the whitish ceramic coating now looks practically new. Will fix a couple of tiny dents later with appropriate paint.
- Removed dew shield and vacuumed inside black coating with a long flat brush, gently. All exposed metal cleaned with IPA.
- Front lens element had plenty of scattered spots (dust, grit and fat-type substance) and a 1mm2 fungus was developing near the edge. Fortunately it was all superficial and the glass/coating were perfect. I blowed the lens with dry photo air, brushed all particles away with a very soft lens cleaning camel brush and cleaned the front lens with (1) B+W lens cleaning solution and a soft microfiber lens cleaning cloth, followed by (2) another wet cleaning with the solution that I normally use to clean my Leica lenses, basically the same that the Texas Tak people use, I believe, or quite similar.
- Focuser was carefully cleaned and rack just slightly lubricated with a tiny amount of Lithium paste.
The TOA-150 looks almost like new!!! The last 2 photos show the cleaned lens and scope.
Now follows the mounting on the EM-400 and the ordering of the needed parts to adapt it for visual and imaging, like flattener, tubes and adapters. I am sure that this scope will bring wonderful learning opportunities in this Forum and many years of pleasure.
Clear skies to all!