|
Zumka, work out the size carefully. Cut out coloured paper the size of various mirrors and hold it in front of your binoculars, at various angles, and see what you can see. It doesn't take much tilt before your big objectives will start collecting light from above and below the mirror's edge, if the mirror is too small. If you are in the dark, then that just means you lose some light in the view - but if the will pick up light or something of a light colour above or below the edge, that will interfere with your viewing. But with that design on a tripod, you can tilt the base plate and therefore keep the mirror from an extreme angled position.
I only found overseas suppliers and the one I used was a good price and shipped very quickly and securely.
Why don't you contact Mark (Satchmo) and get a quote for a nicely ground flat piece of glass. He can also recommend someone to coat it in Australia, I would expect. You might get a top quality local mirror for a very respctable price.
Also your mount will have to be very robust for that size and weight of binoculars.
|