As the magnification increases, critical focus gets more important. This was with a 12.5mm eyepiece; 1/15th sec.; ISO-100.
Sunday, October 21, 2018
Amazing how many "failures" clean up nicely after some processing. Pretty sure this was with a 25mm eyepiece projection; 1/80th; ISO 400
1/320th; ISO-400; prime focus
As the magnification increases, critical focus gets more important. This was with a 12.5mm eyepiece; 1/15th sec.; ISO-100.
There are several strategies for improving critical focus: the Hartmann Mask and its variant, the Scheiner Mask. There is also a new device, invented recently, the Bahtinov Mask. This picture will tell you why few amateurs make them.
As the magnification increases, critical focus gets more important. This was with a 12.5mm eyepiece; 1/15th sec.; ISO-100.
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