Vivitar 800 mm F:11 Solid Catadioptric Lens

[colinM]

Hi All,

Just acquired this Mirror lens for a reasonably cheap price, I know they are soft and hard to focus but I like the concept of long Focal Length and low price. The Lens has all 4 Filters and original case.

My problem is Fungus on front lens.

Has anyone had experience in pulling one of these down.

These appear to be different from the " Normal " Mirror Lenses as they are Solid Glass with no air gaps in the lens.

I have cleaned the rear and was pretty straight forward but the Front is causing some problems.

I can see what needs to be done it's just a problem of how without doing damage.

I do also have a Makinon 500 mm F:8 and a Tokina 500 mm F:8 both cleaned with no problems.

Any advice would be appreciated.

Colin