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Aussie Dave

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Posts posted by Aussie Dave

  1. The image below was my second test session with a pre-loved Minolta MD f1.7 lens stopped down to f4 to stop flaring off bright stars which I found to be a problem with my first test with it. Camera used was the Sony a5000 on a tripod with shutter release cable, ISO 3200, f4, 29 x 8 seconds. Aligned and stacked in RegiStar with final editing in PaintDotNet. It was my first good result from a camera lens. Captured on the 14th of November 2017.

    Location: Suburban backyard Mandurah, south west corner of Western Australia.


    • Like 5
  2. I've had some breaks in the clouds and smoke for some nice solar imaging, conditions still not great but I was happy to get these. In a 3 minute video on the laptop screen some good detail comes through a couple of times a minute briefly for a few seconds. The second image is around 2 minutes as cloud covered the sun at the start of the last minute of the video so I had to stop the recording.

    Captured in SharpCap with the ZWO ASI 224MC and Celestron UV/IR cut off filter in the Celestron Nexstar 8i SCT with focal extension tubes. Aligned and stacked in AutoStakkert, wavelets in RegiStax, edited in PaintDot Net.


    15th November 2017



    18th November 2017


    • Like 8
    • Thanks 1
  3. October 29th, my best Mare Imbrium, Plato crater, Vallis Alpe using the Celestron Nexstar 8i SCT with focal extension tubes pushing a focal length of around 2500mm with the diagonal. Camera used was the ZWO ASI224MC with a Celestron UV/IR cut off filter. Captured in SharpCap at full resolution with the 1.2mp astro camera, 3977 total frames captured in a 3 minute video, 10% (397 frames) stacked. Aligned and stacked in AutoStakkert3, wavelets in RegiStax6 and edited in PaintDotNet. The image has been cropped, converted to monochrome with some level adjustment and sharpened with high pass sharpening.

    Captured in coastal suburban backyard, south west corner of Western Australia.

    23_58_59_l5_ap4783_conv T7c Final.png

    • Like 4
  4. My best Pythagoras Crater to date using the Celestron Nexstar 8i SCT with focal extension tubes pushing a focal length of around 2500mm with the diagonal. Camera used was the ZWO ASI224MC with a Celestron UV/IR cut off filter. Captured in SharpCap at 1304x976 resolution, 4788 total frames captured in a 3 minute video, 5% (239 frames) stacked. Aligned and stacked in AutoStakkert3, wavelets in RegiStax6 and edited in PaintDotNet. The image has been cropped, converted to monochrome with some level adjustment and sharpened slightly with high pass sharpening.

    I was quite happy with the result as conditions were not great (when are they ever) and surprised I'd captured some detail on the side of the central mountain in the center of the Pythagoras Crater. All done in the backyard Mandurah, coastal south west corner of Western Australia.



    Camera Settings text file from SharpCap

    [ZWO ASI224MC]
    Debayer Preview=On
    Output Format=AVI files (*.avi)
    Capture Area=1304x976
    Colour Space=RAW8
    Hardware Binning=Off
    High Speed Mode=Off
    Turbo USB=100(Auto)
    Frame Rate Limit=Maximum
    Timestamp Frames=Off
    White Bal (B)=95
    White Bal (R)=52
    Auto Exp Max Gain=300
    Auto Exp Max Exp M S=30000
    Auto Exp Target Brightness=100
    Mono Bin=Off
    Apply Flat=None
    Subtract Dark=None
    Display Brightness=1
    Display Contrast=1
    Display Gamma=1


    • Like 12
  5. The weather has not been kind to us here in the South West of Western Australia and when there has been clear skies, seeing conditions have not been great. But I'm still at it! :)

    Here are a handful of lunar images that I've captured this month.


    October 1st. Hand held afocal, Celestron Nexstar 8i SCT with an Unbranded 40mm Plossl and a Fujifilm 10mp A170 compact digital camera.



    October 4th (I think). Celestron Nexstar 8i SCT with the ZWO ASI224MC with Celestron UV/IR cut off filter. Captured in SharpCap, aligned and stacked in AutoStakkert3, wavelets in RegiStax6 and edited in PaintDotNet.





    October 5th Harvest Moon. This is what the camera spat out, I didn't add colour. We've had some fires further down south so quite fitting I thought.



    October 8th. First light with the Antares 6" refractor. Prime focus with the Sony a5000, ISO 200, 1/200 sec.



    and finally a moonbow. I've captured these before but I they've never seen them this close to the moon. A couple of nights before this it was very noticeable by eye but by the time I went inside to get all the gear out, set it all up, it was all over. I had to wait for 3 hours for it to come back just to get this shot on this particular night. I have edited and enhanced this photo slightly ;) Taken with the Sony a5000 with stock 18-55mm zoom lens at 55mm, ISO 800,  1/8th sec, f5.6.


    • Like 5
  6. Thanks guys. I believe it to be one of my better attempts although conditions are still not great here and I was late getting out there. The sun was probably 50-60 degrees above the horizon and dropping. I don't do as much solar as I would like due to work and the weather hasn't helped either, it's been cruddy for weeks.

    I'm still not sure how far to take it as far as the granulation goes and feel I've overcooked that second image and was on my way to doing the same with the third image but held back on that one.

    @Freddie it would be interesting to see the change if you can get out and image it :)

  7. I managed to get some solar imaging in this afternoon.  Today I used the white light solar film filter not the solar glass filter with better results than my previous attempt. Still battling some wind and passing clouds. Location Mandurah Western Australia.

    First full disc solar image is a single exposure handheld afocal with the Sony Cybershot 14mp compact digital camera near a 40mm Plossl eyepiece in the C8i SCT,

    The second and third image is with the ZWO ASI225MC stacked and aligned in AutoStakkert, 112 frames with the third image a full res crop. Wavelets in Registax, final edit in PaintDotNet.

    The forth image is handheld afocal with the Sony Cybershot 14mp compact digital camera showing an eyepiece view with the 40mm Plossl with passing light cloud over the sun, limited editing for this one.






    • Like 3
  8. Captured this afternoon in Mandurah, Western Australia.

    Taken with the ZWO ASI224MC and the Celestron 8i SCT with focal extension tubes and white light solar film filter. A two minute video was captured with the final image being cropped and having 10%, 112 frames aligned and stacked in Autostakkert 3, wavelets in Registax 6, edited in PaintDotNet.



    • Like 2
  9. I bought the M6 25mm hex bolts or what we call over here in Australia Allen key head bolts which seem to be referred to as the same in the UK going by that site. I was only referring to them as hex screw/bolts in the opening post as that's the results I got from ebay's listings and I wasn't sure what other people knew them as from different countries. If I said Allen key, someone would of said hex. As for bolts that you use a spanner on, we just call them bolts, that's it, simple. I know you all knew what I meant, no biggy.

    I think the 20mm long ones would still be a little short although I'd get a few extra full turns on them and the 25mm I'd say may be too long and I may need to pack it up with a washer or two or grind some off the threaded end. All good, problem solved, thanks everyone :) now the 4 week wait for them...

    This is what I have in it now. A screw bolt both for phillips head and flat head/blade screwdrivers or what we just call here a screwdriver :icon_biggrin: (for flat head or flat blade). These screw bolts are similar looking to those that we use on our fencing here in Australia which is why I don't like the look it on my gear. It's a personal thing, I did fencing on and off for some years and that's why I want them gone.



  10. Cheers Roger, looking at M6 20mm but no there's mention of the length of the threaded part. atm I'm visually sizing them up by eye to get longer ones than what I have. I have round head screwdriver bolts in there now as they are a little longer but I don't like the look of them.

    Thanks LB, I can also see the partially threaded ones, I don't think that would be an issue unless it would affect going through that first hole of the dovetail bar. Mine seem firm getting the threaded part though.

    I'm looking at these but they don't seem to be much longer http://www.ebay.com.au/itm/4pcs-M6-x-20-Titanium-Ti-Screw-Bolt-hex-Socket-Cap-head-Aerospace-Grade-/232406159198?epid=579379141&hash=item361c7c8f5e:g:f74AAOSw4GVYQHQn


  11. Hi all. I'm wondering if anyone can tell me the name for the mounting bolts for a standard dovetail to OTA rings are called. The only reference I've found so far are M3 and M4 hex head screw/bolts and I'm still not sure on these as far as size goes, thread size, width etc.

    I need two longer hex head screw/bolts for a refractor, has the standard dovetail bar and the ones I have from another dovetail bar and rings are too short. I'm only getting at best one complete turn on the thread. I need them about 20mm long.


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