Hi Mum (on behalf of MITM)
I agree with Astro744, - anything in the Tlevue plossl range is great quality, and the TV barlow I have myself and can vouch for it.
I mainly wanted to mention the binocs. Your post mentions "fully coated lenses" and "fully coated optics". The way binocular optics are described in terms of the way the reflecting surfaces are coated is not usually done casually, and you should be steering yourself towards a pair that is described as "fully multi coated". These are available for a reasonable cost, and will perform the best for you and your son.
Check out -
www.aoe.com.au
www.bintelshop.com.au and
www.andrewscom.com.au
Best wishes,
