Jump to content

SkySurveyBanner.jpg.21855908fce40597655603b6c9af720d.jpg

lunator

Moderators
  • Posts

    7,950
  • Joined

  • Last visited

Posts posted by lunator

  1. here is an image of Mars I took yesterday. I haven't managed a decent pic using phone afocally so I decided to try something different.

    Scope OMC250

    Eyepiece Pentax 14mm XW. and x2 barlow giving x300 Mag. 

    An old Win7 laptop and SPC880 upgraded to 900nc.

    set at 640x480. 30fps in sharpcap. messed around with gain to see what would happen.

    Used quick capture.

    Stacked in Autostakkert and a bit of wavelet in registax and a final tweak in GIMP2.

    The data was collected by holding the  webcam up to the eyepiece and standing very still :)

    I can see the colour is a bit off but overall I am happy with a 1st go.

    Any feedback appreciated.

    Cheers

    Ian

     

     

    Mars_02-11-20.bmp

    Mars_02-11-20.jpg

    • Like 3
  2. Hi Mark,

    Never under-estimate the power of the ortho :)

    I think it's low number of elements mean you lose less light as it travels through the optical train. Not as issue usually but on something right at the margins it can make all the difference.

    I keep meaning to have a go at this SN but I forget whilst trying to tease out details in Mars.

    Cheers

    Ian

  3. Hi David

    Very good sketch :) It looks very similar to what I could see around 8.30 last night. 

    The details were quite low contrast last night, although there part of the I think it was Aeria appeared quite orange.

    Cheers

    Ian

  4. Hi Mark

    Very nice pics. 

    I put mostvof the mushiness last night down to lack of scope cool down time, But the seeing might have been deteriorating as well. 

    You got some nice detail in there :)

    cheers 

    Ian

    • Thanks 1
  5. I decided to have a go at sketching Mars last night.

    Gut back from work about 10.30pm and the ckouds were clearing. 

    The scope did not really have enough time to cool down but there wasn't much I could do about that.

    The first sketch is the pencil drawing the second on I have added some colour. 

    I might have another go if we have a clear spell next week.

    Scope OMC250

    Eyepiece 6mm ortho.

    Magnification x375

    Seeing 3/5

    Transparency 3/5

    Time 22.55-23.15 UT 23/10

     

    20201024_095629.jpg

    20201024_135455.jpg

    • Like 7
  6. Hi mark

    Very good sketch :)

    The seeing was a bit variable last night but there were periods where it was excellent. 

    What amazed me last night was when the seeing improved the edges of the features were very obvious.

    Cheers

    Ian

    • Thanks 1
  7. Interesting idea. I know from experience increasing magnification allows you to spot fainter objects. When I observe double stars mag 11+ stars which are not visible at x70 magnification start to appear once you get into the x100-150 range. 

    I guess the only way to find out is to test an ethos against an orthoscopic eyepiece :). 

    cheers

    Ian

    • Like 1
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.