lfaltz's blog

Full Sun disk in H-alpha

Here's a full-disk image (not a mosaic) of the Sun on Saturday morning, April 19th, in the hydrogen alpha band (656.28 nanometers) with a double-stacked Lunt 60mm scope (bandwith <0.5 nm) and a 0.5x focal reducer. QHY-5M-II CMOS camera. Best 25% of 3100 frames stacked in Autostakkaert2, very slight wavelets in Registax 6, a few passes with the Photoshop unsharp mask function.

Mars & Jupiter: First light with new camera

I picked up a monochrome QHY-5M-II CMOS planetary/guide camera at NEAF, intending it for lunar and solar work. The tiny camera, the size of a small eyepiece and weighing much less, has 74% quantum efficiency in the green part of the spectrum, and a respectable 50% QE at the red Ha line. I took it out last night for "first light" using my Orion Apex 127mm Maksutov on an iOptron Minitower mount.

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