Quote:
Originally Posted by midnight
This has been a project Doug and the results are showing.
For a presentation without darks shows the capability of the camera and it can only get better from here.
I really like it - Great project Doug!!
I noticed you're using the lense at wide open. To me this is more visually appealling than the diffraction spikes from the lense iris. Are you happy with the performance at F4 (wide open)? The results seem to support using wide open in this case and pickup the benefit of round stars.
Darrin...
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Thanks Darrin - I've recently been experimenting with stopping down the lenses with aperture masks in the form of step adapter rings. Can't say that I've noticed dramatic differences from the lenses wide open apart from the increase in exposure time needed to get a bright image at the sensor. So I've given up on that and have gone back to using them wide open... f4 for the 70-200 and f5.6 for the 400mm - that's as slow as I want to go. And as you've stated I too am not a big fan of the lens diffraction spikes.
Re Darks: in this instance I found that calibration of the subs with a temp matched library dark introduced aberrations rather than removing them!
I find that I'm not as precious about all the calibration stuff on some images - probably more laziness than anything else - sometimes it works, sometimes it doesn't!! I think I'll explore the "Bad Pixel" algorithm in Nebulosity to deal with hot sensor pixels.
Did you buy Paul's Astro 40D?
Doug
