Wednesday, May 1, 2013

The Sun in H-alpha light

An Opticstar PL-130M, monochrome, 1280 x 1024 CMOS camera was fitted with two ND13 filters to bring the light levels within the sensitivity range of the sensor. The camera has a 1/2" sensor, so, when placed at the prime focus of a Solarmax ll 60 BF15 H-alpha scope, the image of the entire disk falls on the chip. The camera was set to capture 5 minutes of AVI at 8fps. The data were stacked in Registax to produce the final image which has been colourised to represent the wavelength of light being used.


A DMK 21AS camera was placed at the prime focus of the Solarmax scope and 5000 frame AVIs were captured of 4 overlapping regions of the solar disk. The resulting images were stitched together to produce a single image:


The region of the solar disk containing the active regions AR 1732, AR1734 and AR1736 was imaged with a 2.5 x Barlow:


The region containing AR1731 was imaged and colourised:

























Afocal image of a prominence with a hand-held Fuji compact camera


Steve Wainwright

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