Quote:
Originally Posted by erick
The "Chinese" produced a small spot which sits neatly inside the ring centre spot on my 8" and the triangle centre spot on my 12". The dark spot from the Orion overlaps the ring and triangle considerably and makes it more difficult to accurately overlap them
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This matching of centre spot dimensions to cheshire hole size is an important consideration that doesn't seem to get discussed much.
I have a Synta cheshire and also a cats eye telecat combination tool.
What i have found is the the cats eye triangular spot with 1/4" centre hole is an excellent fit to the hole of the synta tool,and allows extremely small errors to be seen.
My 15" currently has a ring binder spot which doesnt fit either tool very well. My collimation is close, but never great simply because it can be a couple of mm out before a misalignment is visible in the cheshire.
I must get around to upgrading that centre spot.