Tag : powermate

Jupiter November 2011

It’s been a while since I imaged Jupiter, and I have never imaged it since I got my Skywatcher 120mm ED refractor.

This was taken with a mono DMK21 camera and stacked in Registax 6. It was taken using a Televue 2.5x Powermate. I did try a 5x Powermate but the image was too blurry even once stacked and sharpened using wavelets.

It’s a small Jupiter, but perfectly formed!

Coronado PST Images

Well I went out and purchased a Coronado PST from ScopesNSkies the other week and was itching to try it out, but it seems since I have bought it, it’s now cloudy every day – typical! I did get to put it on my NEQ6 mount and do some imaging one Sunday morning though.

I used my Televue Powermate 2.5x with my DMK21 camera for these shots. The video was stacked using Registax 6.

These images show the Sun in Hydrogen Alpha or Ha. I think for the price of the scope it does not do a bad job. This a basic entry level version of the Coronado PST which can be purchased for just over £450 new.

I was not so happy with the first image, I took two images for this shot and then layered them in Photoshop, but to me they still look a bit fake, perhaps because I added the false colour first to each and then layered them, next time I will layer them first and then flatten the image and add the false colour.

Coronado PST Image 2.5x Powermate and DMK21

Coronado PST with Televue Powermate 2.5x and DMK21 Camera

But overall I am quite happy with my first efforts, I have also subsequently learnt how to take flats against the Sun, so I need to subtract the flats next time to remove the dust bunnies. Then I just need more Sun and more free time!

Moon Images with 5x Powermate

I decided to try and push my Skywatcher ED80 Pro to it’s limit on the moon. I am really impressed with my Skywatcher ED80 Pro telescope, as it gives me some nice widefield views, and I also use a Williams Optics version 3 flattener 0.8 which gives me even more view.

The Skywatcher gives me nice views of the Sun, Moon and Deep Sky Objects. I think the only thing that an 80mm type scope is not good at is planetary imaging and small Deep Sky Objects, like the Ring Nebula or Eskimo Nebula.

I was a bit worried that my 80mm scope would not cope well at imaging the lunar surface close-up. But I was pleasantly surprised that I managed these images with the scope.

The setup included the 0.8 William Optics flattener/reducer together with my Televue 5x Powermate and the DMK21 CCD camera.

Focusing was tricky, as the moon looked liked it was underwater from the atmospheric turbulence. But once I had stacked the images using Registax (version 6 is now out) they looked a lot better.

This time I also took a flat image, by using my EL panel which I have encased between 2 A4 acrylic sheets. I took a 1 second snapshot in the IC Capture software in order to get the flat image. I then opened it up in Photoshop and checked the histogram, and it was about nearly dead centre.

For the first time I then used Registax to stack the frames of the AVI videos with a flat frame selected. The results were good, as my DMK21 camera seems to have lots of dust bunnies in it, but I think most DMK cameras must suffer from this problem.

Moon with Televue Powermate

Theophilius and Cyrillus lunar craters