Hello to all the members who have kindly contributed to this thread.. Thanks Brian for you welcome. I was delighted to find this "nebula of astronomy" recently.
My thanks to all those who have contributed suggestions. I like the idea of the mask and will give this a try to begin. I actually saw one at a colleagues astronomy store recently. It piqued my interest immediately. From my side i have learnt to defocus easy targets like the moon to a certain extent but the technique lacks precision. I look forward to following up with my experiments with masking.
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