The sharpness of the pillars is outstanding, and the stars are tight and round across the field. I have to ask about the background smoothness. Is that a noise reduction filter applied? Seems to have that waxy, too smooth look? Not criticising, just curious. I can only compare the backgrounds to my modest equipment, with which I see much more noise and I guess as a result, accept a more noisy background. Higher end gear must be smoother (and I've noticed that recently on one of Bert's raw images recently), but don't know to what extent.
The sharpness of the pillars is outstanding, and the stars are tight and round across the field. I have to ask about the background smoothness. Is that a noise reduction filter applied? Seems to have that waxy, too smooth look? Not criticising, just curious. I can only compare the backgrounds to my modest equipment, with which I see much more noise and I guess as a result, accept a more noisy background. Higher end gear must be smoother (and I've noticed that recently on one of Bert's raw images recently), but don't know to what extent.
The background smoothness is probably due a number of factors, No diffraction spikes, superb optics (the Honders ( a 12" F3.8 scope ) is fully corrected for all 5 Seidel aberrations spherical, coma, astigmatism, field curvature and distortion), the camera being at -40C, a 3nm filter, plus had a good calibration data set.
Guiding was at a modest 5Hz....hence it's pretty much all signal, no noise.
Quote:
Originally Posted by Joshua Bunn
Wow Peter, Pinpoint tiny stars, contrast and depth.
The background smoothness is probably due a number of factors, No diffraction spikes, superb optics (the Honders ( a 12" F3.8 scope ) is fully corrected for all 5 Seidel aberrations spherical, coma, astigmatism, field curvature and distortion), the camera being at -40C, a 3nm filter, plus had a good calibration data set.
Guiding was at a modest 5Hz....hence it's pretty much all signal, no noise.
Thanks for the reply. That's amazingly smooth background for no noise reduction. Almost doesn't look right and you should throw some noise in there
)
