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TheMan

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Posts posted by TheMan

  1. Not sure if it's of any worth. But I've bought a 7nm svbony Ha-filter from ebay for around 170AUD (!). contrast and detail improvements are significant and works well for long exposures in my Bortle 8 backyard. The coatings are decent and haven't seen any reflection on really bright objects

  2. I bought a ZWO 294mc cooled camera a year ago and have had some really fun times with it. The other day I noticed though that when I cooled it and took a photo there was what looked like some dew or something on the sensor.  Some images to confirm, 2 flat frames, one at 24C and another at -10C, and 1 image of thors helmet -10C. Is there a desiccant tablet that needs to be replaced, just cleaning? Any help is appreciated.

    -10 C.jpg

    24 C.jpg

    thor' Helmet 120s -10 C.jpg

  3. Just finished figuring my first telescope mirror about a week ago, put it on the star tester and had a look. I took a snap of it and although I think it looks good but I'd like a second opinion. 

    Take into consideration it's not collimated as it should be, but I only had gaps in between the clouds and didn't have time to collimate properly.

    8 inch f/5 8mm eyepiece

    2123178646_startest.thumb.jpg.e6dd5d7df0326b260208c98846b52458.jpg

  4. I bought a ZWO asi 294 mc pro a few months ago. I was really happy with it and my 72 ed. Recently I have been getting this colour blotching artifact which I cannot find a cure on how to fix it. I have tried not using the cooler, using flats, darks, dark flats etc. Unfortunately nothing is working. I'm afraid that it won't be curable as other people have been getting the same or similar artifacts. (https://bbs.astronomy-imaging-camera.com/viewtopic.php?f=21&t=8007) Any help is appreciated.

    rosette copy.png

    Rosette Lights_120sec_1x1__frame34_d.jpg

  5. I am currently making my first 8 inch telescope mirror. 950 - 980 mm focal length. Figuring was going well, until I made a bit of a mistake and did a stroke for a bit too long. Around the centre zone I made a deep zone and I am unsure of how to fix it. I have a full sized & a 3 inch size lap to fix this. What stroke will help get rid of this? Surface texture is not an issue at the moment, I will smooth it out later. Any help is appreciated. 

    DSC_0047.JPG

  6. I have an asi 294 mc pro, az gti and an asi 120mc. This platesolving has not been going to plan lately. I use platesolve 2 in sgp and it finds matches, but every attempt it makes to centre it it just gets worse. I have tried many solautions but none work. star aligment did not help.

    Any help is appreciated

  7. I was reading the zwo forums and some people have been having similar issues. One guy said he found a solution though. "I used SharpCap Pro to do a Sensor Analysis and then used the Smart Histogram tool to suggest an exposure for my sky conditions which are Bortle 4, 21.45 so quite nice. The exposure recommended was 255s at gain 120 with an Offset of 4. The drivers default to 28 and 30 (ASCOM/direct) on my laptop when clean installed. With an offset of 4 I get lovely data."  

    It seems that the 294 mc pro is having a lot of issues with many people, i'm hoping zwo can resolve them if that is the case.

  8. 23 minutes ago, Whirlwind said:

    Have you changed the settings recently on the camera (e.g. gain / cooling etc?)

    I don't believe I have changed anything, but i'll definitely try resetting everything to default and making a new profile. Also is -10 on the camera too low/high for good results?

    23 minutes ago, Whirlwind said:

    It might help if you posted the video here

    I don't quite understand what you mean with that part.

  9. 8 minutes ago, Whirlwind said:

    I think it is better to confirm this first.  Have you blinked the sequence of images without a star correction to see whether there is any movement?

    Are you guiding at all or is it very short subs stacked?

    I did blink the files and there was movement, whether from backlash, dithering or flexure I do not know, but there is significant movement. I used 120s subs guided.

    Funny thing is that I didn't get this issue before, it only started up recently. I might make a new profile in sgp to see if that has something to do with it.

  10. 9 minutes ago, wimvb said:

    What exposure time did you use? Your image looks under exposed.

    I used 120sec exposures. For some reason though that sequence was at gain 10 offset 10. That is a possible issue

    10 minutes ago, wimvb said:

    Have you tried cosmetic correction in PixInsight?

    I'll give that a go.

  11. I own a zwo 294 mc pro, a 72 ed f/5.6 refractor and a skywatcher az gti on eq mode. For the past 3 nights some of my integrated images have walking noise. I have tried different stacking methods in pixinsight and in deep sky stacker yet the same result comes back to haunt me. Does anyone know how I can fix this? I use extreme dithering in sgp for anyone wondering.

    No darks in the integrated image

    Autosave001.jpg

    thingy_120sec_1x1__frame34_RGB_SuperPixel.jpg

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