I use a Skywatcher 200P which is an 8" reflector focal length 1,000mm giving an f stop of f5, most of my images with it are at prime focus, which can be achieved with this scope, the barlow which I have used isn't great it is the kit barlow. This hill top is about 1km away or more and shows the same issue. I have included another shot just to show again a softness. So you think it could be related to the moon being low on the horizon? I think that could be an issue, but i never manage sharpness so im hoping im missing something like colimation. I wanted to show both as i feel the same problem persisted with lack of sharpness. I agree it was quite moist humid albeit cold when the Baader photo was taken and it is a much better quality barlow than the other one i used. These are two examples that i ha to hand, but all my images tend to be soft in terms of sharpness. If you look at the east of the moons edge (as viewing the image) you can see air convection currents distorting the edge, but they could be within the scope as I said I was only doing a test and the scope hadn't cooled down fully. I would suggest the barlow in the tiff is better than that is the cr2.įor the OP to compare, I shot this the day after the tiff image, so much higher, but about the same as the cr2, 19/11/20 16:54 ISO 200 1/320th Skywatcher P200D f5, only edit is a crop, I only got this because I was doing a series of test shots, but it does show the tiff image is not far away, when you consider the problems of low altitude imaging, nor can I work out the true focal lengths and magnification, my original is 20x as it is shot at prime focus. What my conclusions would be, are to try to shoot in manual mode for the exposure, take several shots at different speeds, and try to shoot the moon at higher altitudes, judging from the differance in C.A. The Tiff, taken 18/11/20 18:06 1/100th ISO 1600 metering pattern, again from my location, at 18:00 was just over 3 degrees, so very difficult at best, Sharpness is quite good given it very low altitude, and high ISO no sign of heavy C.A. upper right of the moon, on that date and time from my location in West Yorkshire would have put it 12 degrees above the horizon, so quite low a lot of atmosphere, the slow shutter will not have helped, but in terms of sharpness, not much worse than I can seem to achieve at the same altitude. I did look at the pictures, but obviously can't repost without permission, the cr2 file from the info, was taken 26/8/20 20:57 1/10th's ISO 100 pattern metering, shows a half moon, alot of blue/cyan C.A. png format so that it can be displayed in the browser. Moon Baader Full 2.tif you upload the image in either .jpg or. i have included another photo using a different barlow with the purple fringing as it more clearly shows the lack of sharpness. I have included an image of the moon i took, it has been sharpened a bit in post but it still shows a softness. so im left with the telescope being the issue. I have a Baader Zoom Barlow and a Canon DSLR, both fairly quality items. is that related to focus? i mean i can see through it ok as it seems sharper to my eye than when i try to take photos but it could just be my eye thinking its sharp. Im fairly new and have never collimated my scope. neither via live mode on the camera nor once the picture is taken. I can focus with plenty of room on either side of where i would expect sharp focus to be, but never find actual crispness. I have 3 barlows varying in quality but all suffer the same problem. I've got a Powerseeker 114eq - with this prime focus isnt possible with a dslr, so im using a barlow to get an image. So using my telescope it seems fairly sharp with my eye, but when taking photos i just cant seem to get it sharp enough! Its not an ideal scope for this but non the less its what i have and i am trying to make the best of it. I've started trying to take photos through my telescope.
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