Swansea Astronomical Society Blog

Saturday, August 7, 2010

Solar images from Freshwater East

These images were taken on Monday 02/08/10 from Freshwater East. I used my EQ3 mount, 120mm Skywatcher ED refractor, Baader solar filter and a DMK31 camera. The H-alpha image was taken through a PST with a DBK21 camera and a x3 Barlow. They are images of AR 1092:

Keith Davies

posted by astroimager  # 3:58 AM 0 Comments

Thursday, August 5, 2010

M27 with the modified Samsung SDC-435 video camera and a 5" Newtonian

Last night I captured DVD data on M27 with the Samsung SDC-435 frame-accumulating video camera at the prime focus of a 5" f/5 Newtonian on an AZ mount. The camera was fitted with a light pollution filter. VOB Frame Extractor was used to extract BMPs from the DVD VOB files and Deep Sky Stacker was used to dark-frame correct, de-rotate and stack the images. Andrew Sprott's Dark-Frame Scaler was used to correct the dark-frame for this image:
M27

The colour fidelity was good now that I have made what are probably the final adjustments to the white balance control.

Steve Wainwright

posted by astroimager  # 8:45 AM 1 Comments

Monday, August 2, 2010

A webcam new to Astronomy the Sweex WC060 HD

Today I experimented with a CMOS HD webcam that has a high dynamic range of 71 dB. The price was £29-99 from Maplin. The camera has a standard lens thread so a Mogg adapter can be screwed directly in place of the lens. The camera has a 10bit ADC and it is hoped that it will be suitable for high definition imaging of the Moon with a high dynamic range. Today I was able to test the camera on the Sun through a H-alpha PST. I used an IR/UV cut filter and the lens assembly from a x2 Barlow. This was needed because the image was too bright at the prime focus. I captured 1300 frames at 800 x 600 resolution and this was the result:
AR1092 in H-alpha light

First light for this camera is promising. However, the driver is not fully functional and I have been unable to get it to work at a resolution of higher than 800 x 600. Hopefully Sweex will release improved drivers soon.
Of course, the real test for this camera will be the Moon and the illumination in the region of the terminator.

Steve Wainwright

posted by astroimager  # 2:38 AM 0 Comments

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