William Optics 132 testsAerial about 300 yards distant. Stack of best 14 out of 30. ![]() St Johns church. 2000 feet distant. Best 20 from 50 images in fading light. ![]() Arcturus out of focus. Nice round rings showing optics are not pinched in the cell. ![]() 13 second exposure of Arcturus. The image shows a much enlarged copy of some stars at the end of each arrow. Stars away from the centre are elongated, showing that a field flattener is needed for astrophotography. ![]() Stack of best 8 images of Deneb. 30 seconds exposures with no guiding and very rough and ready polar alignment. Need for field flattener quite obvious at the corners. ![]() Negative of above image ![]() Stretched to show degree of vignetting. The camera was a Canon 350D with a 1 1/4" adapter which probably contributed most of the vignetting.
Bahtinov image on Deneb |