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I reimaged NGC7000 recently with two different configurations an compared the result to an earlier wide angle image. This object is fascinating to me because it is a very large and very dim region that is at the limit of human vision under ideal conditions, but easy to image with time exposure.
This is am image taken in 2020. The image details are here.
This image was taken on the night July 12, 2024 with a Nikkor 200 mm focal length F/4 lens at F/5.6, ZWO ASI2600MC Pro, Celestron Advanced VX mount, QHY mini autoguider with QHY-LII guide camera. Controlled with Sequence Generator Pro 4.2.0.955. Camera temperature at 0 C. Processed using PixInsight 1.8.9-3. A total exposure of 10 Lights at 10 minutes exposures = 100 min total exposure. The image is calibrated with 16 Flat and dark frames.
This image suffers from chromatic aberration. The lens was not designed to work under such a wide range of wavelengths and wide sensor dimensions.
This mage was taken with a Stellarvue SV80ST, SFFR80 field corrector and reducer, ZWO ASI2600MC Pro camera cooled to 0C, Celestron AVX mount, QHY mini auto guider and QHY LII camera controlled with Sequence Generator Pro 4.2.0.955 and guided with PHD2 2.6.13. The net focal length was 384 mm at F/4.8. It was controlled with Sequence Generator Pro 4.2.0.955. Camera temperature at 0 C. Processed using PixInsight 1.8.9-3. A total exposure of 14 Lights at 10 minutes exposures = 140 min total exposure. The image is calibrated with 16 Flat and dark frames.
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