James Lennie
30-01-15 The waxing Gibbous Moon at 10.23 days old
The Moon taken with a AZ4 mounted Skywatcher ED100 Refractor with a Canon 60D at prime focus ( 900mm ). The true focal range is in reality 1440mm as the sensor in the 60D is cropped and you must multiply the focal length of any lens or telescope by x1.6 to get the accurate focal length. To answer quite a few questions recently the lunar image only fills about half the sensor/ field of view even at this focal length on a cropped sensor and I crop the the image to only 2300x2200 pixels to get a decent whole disk size, I then usually enlarge this to 3000 pixels for posting here. I also have a 6D which is full frame but the image is so small that by the time it's enlarged it's marginal resolution benefit over the 60D is lost and the lunar images produced by the 6D at this focal range are always inferior to the 60D's, this also applies to solar images as well as the Sun is about the same angular size in the sky as the moon despite being 400 times further away from the Earth.
30-01-15 The waxing Gibbous Moon at 10.23 days old
The Moon taken with a AZ4 mounted Skywatcher ED100 Refractor with a Canon 60D at prime focus ( 900mm ). The true focal range is in reality 1440mm as the sensor in the 60D is cropped and you must multiply the focal length of any lens or telescope by x1.6 to get the accurate focal length. To answer quite a few questions recently the lunar image only fills about half the sensor/ field of view even at this focal length on a cropped sensor and I crop the the image to only 2300x2200 pixels to get a decent whole disk size, I then usually enlarge this to 3000 pixels for posting here. I also have a 6D which is full frame but the image is so small that by the time it's enlarged it's marginal resolution benefit over the 60D is lost and the lunar images produced by the 6D at this focal range are always inferior to the 60D's, this also applies to solar images as well as the Sun is about the same angular size in the sky as the moon despite being 400 times further away from the Earth.