Tag Archives: ASI120MM

High Resolution Near IR Lunar Imaging – 22nd Jan 2016

We’ve had some poor weather this winter so far for astronomy, but we’ve had some clearer nights in the last week, but with the moon at a fairly full phase. So I’ve been working with the 14″ SPX350 in honing my high resolution lunar work a bit.

I had two fairly average sessions working with the ZWO camera in unfiltered mode, but suffered a lot from poor seeing (potentially due to thermals from houses I image over) especially with stacks coming out with “ghost craters”. However, for this run of images, I used an Astronomik ProPlanet 742 filter I have just purchased (this is a near IR filter passing wavelengths longer than 742nm).

This has given a very good set of results – with three images surpassing the resolution I’d previously been able to get – and working at a focal length around 3200mm too by using a Meade series 4000 barlow lens in front of the camera and filter (giving a resolution of about 0.24″/pixel). Previously, I’ve only got good results at prime focus.  From a first time using it, it certainly appears that this filter does help with larger apertures where seeing is not perfect. Images, while not totally unaffected by seeing, seemed a lot more stable in terms of high speed jitter or double vision on craters.

Images were taken around 98% illumination so all the images are from areas around the eastern limb of the moon – with limited targets available and with cloud rapidly rolling in, the session was somewhat curtailed!

Pythagoras:Pythagoras - 22/01/2016

Grimaldi, Hevelius, Cavalerius:

Grimaldi, Hevelius, Cavalerius - 22/01/2016

Phocylides, Nasmyth, Wargentin and Schickard:

Phocylides, Nasmyth, Wargentin, Schickard - 22/01/2016


Lunar Imaging – 20th Dec 2015

A long time since the last post (and still needing to properly process the lunar eclipse images I took at the end of September) I finally got the 14″ re-mounted and collimated for some lunar work.

Images were taken through an Orion Optics SPX350 at f4.52 (prime focus) using a ZWO ASI120MM. Images were stacked with Autostakkert, processed in Registax 6 and Photoshop.

First up: The South Pole region (including Tycho, Clavius and Moretus)

Lunar South Pole - inc. Tycho, Clavius, Moretus

Copernicus and surrounds:

Copernicus and Surrounds

Rupes Recta in Mare Nubium (also showing Rima Birt and the lunar dome Kies Pi):

Mare Nubium, Rupes Recta, Rima Birt, Kies Pi

Mare Imbrium and Plato:

Mare Imbrium and Plato