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Actually I've tried collimating with a contrast booster on, it works to an extent as well. I've often tried with the 3 holed mask but this is the first time I've reduced the aperture so far...no assistant, but I'm pretty quick at getting to the primary screws L.
The only thing that's Ps me off is having to re-align the finder if one has to move the primary a fair ways. This is the 1st time I've seen a airy disc so clear before....Just the ticket for splitting Sirius too I reckon!
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