Replacement Donut

[widow18 (Pete)]

Could someone please advise me where to purchase a replacement donut for a 200 mm primary mirror?
Thanks in advance
Peter

[doppler (Rick)]

If you mean centre spot, try Office Works or your local newsagent. (ringbinder re-enforcing rings)

[widow18 (Pete)]

Thanks Rick, tried that, they are too chunky.

[brian nordstrom (As avatar)]

That does not matter at all , its hidden by the secondary shadow , just be sure to get it as central as possible , google it and you will find quite a few pages on fitting it correctly .
Brian.