Catseye Centring Template
Friday, 21 February 2014 | Jake
Whilst it's possible to produce your own centring template, the Catseye template is very nicely printed on durable clear acetate film and accurately printed/marked. It came supplied with hotspot and clear instructions in a cardboard mailing tube. I was initially concerned that it might be curled and require flattening before use, but the acetate unrolled out flat with no observable distortion.
As I have multiple mirrors to spot, FLO were very helpful in supplying 3 additional hotspots with the template at nominal cost.
I spotted two 8" mirrors single handed and spent longer removing the old spots than applying the new.
Very simple, precise and quick to use - though you may require another hand for the bigger template and larger mirrors.
As an aside, the previous centre ring on my skywatcher mirror was 2mm off, which @ F5 is not accurate enought (2.8mm sweetspot with a radius of 1.4mm)