Jump to content

Stargazers Lounge Uses Cookies

Like most websites, SGL uses cookies in order to deliver a secure, personalised service, to provide social media functions and to analyse our traffic. Continued use of SGL indicates your acceptance of our cookie policy.

stargazine_ep3_banner.thumb.jpg.5533fb830ae914798f4dbbdd2c8a5853.jpg

Johns22

Members
  • Content Count

    31
  • Joined

  • Last visited

Community Reputation

38 Excellent

1 Follower

About Johns22

  • Rank
    Nebula

Profile Information

  • Location
    Shropshire
  1. Hi Simon, Are you syncing Stellarium after you align each star? Once aligned in the eyepiece, you should go back to Stellarium and press CTRL-3 (by default) to align Stellarium to the actual star/object. I also put the laptop in a plastic box with clip on lid to avoid dew issues. Cheers John.
  2. I chose the Canon 600D which has favorable reviews for astro modifying. I haven't modified it yet as with this being my first ever DSLR, I enjoy using it during the day too. I do use a Svbony CCD filter for light pollution - these are cheap at £40 - I would like to try the more expensive ones as a comparison. I picked up the 600D with approx 1000 on the shutter count, in the original box with all the accessories for £140 earlier this year. It's immaculate!
  3. Thanks @Notty @Paul2019 and @geeklee - its great to see different takes on my data. Glad you enjoy working with it
  4. Thanks Tommohawk, I had seen the tip online to take flats in AV mode. I will try again on the next imaging session to just adjust the exposure to see if I can resolve this.
  5. Thank you guys, I have little option but to persevere with it and I will be trying the tips outlined above. I have been letting the cables trail from the scope to the laptop (the guide cam 2m cable makes it difficult) but I have recently acquired a small powered USB hub which I aim to mount on the scope and then have some cable management. Appreciate all the comments, thanks.
  6. Here is my first "successful" attempt at a galaxy! The Whirlpool Galaxy (Messier 51) taken on 25th March 2020 from my garden using a Skywatcher 200P, EQ5 Goto Mount, Canon 600D, ZWO ASI 120mm Guidecam on a Skywatcher 9 x 50mm Finderscope, captured using NINA, guided with PHD2, stacked in Deepskystacker and processed in Photoshop, using GradientXTerminator action and Astronomytools action set. I've found this really difficult to process and will probably spend time reprocessing in the future to find my preference but we have to start somewhere! 289 x 40 sec Lights @ ISO 800 40 x Bias frames @ ISO 800 30 x Dark frames @ ISO 800 20 x Flat frames Stacked file also attached for anyone who would like to show me the error of my ways! Autosave.tif
  7. Thanks, I will try the east heavy balance tonight. I have entered 190mm for the focal length of the guidescope (following advice on others using the standard 50mm finder on here with the camera). If I get chance before setting up tonight, I'll post the guide log file. The imaging camera is a Canon 600D unmodified. Cheers John.
  8. I've done this, this week with Adobe Bridge - free to download and you can select any number of images before rotating. I also use it to check image quality before stacking. https://www.adobe.com/uk/products/bridge.html
  9. I've recently purchased a guidecam (ASI 120mm) from the helpful guys at FLO in the hope of increasing my exposure time. My first night of trying to guide was a nightmare last Sunday night with calibration taking ages and then the correction graph looked like a portrait of the Alps... Monday night I discovered that you really need to nail your polar alignment for guiding to be effective, so I invested in Sharpcap Pro. Wednesday night I got all of this working, SharpCap polar align said it was Excellent, PHD2 caliberated quicker (had an advisory on DEC backlash) and showed far less adjustments when guiding, I set focus with a bahtinov mask and then run my first few 60 sec exposures to find significant star trails. I ended up doing 40 sec exposures which were the absolute maximum before trailing became an issue. Rather disappointed having shelled out a few hundred quid! I'm running a Skywatcher 200P on an EQ5 Goto Mount, guided with a ZWO ASI 120mm fitted to the standard Skywatcher 50mm finderscope. Am I pushing the mount too far with a DSLR and guidecam fitted? Could the guidescope need realigning with the OTA? Have I missed something really fundamental? I plan to image again tonight and am keen to understand the errors of my ways! Any help very much appreciated.
  10. Hi Michael, The camera was directly connected to the scope when the flats were taken so not sure why the photo's say a 50mm lens was attached. Could this be a setting in the camera? I haven't changed anything in the settings in relation to Auto rotate - should that be set? Cheers John.
  11. File info shows 1/2000 sec. 50mm @ ISO800 with 2 layers of t-shirt, then 1/2500 sec. 50mm @ ISO800 with 1 layer of t-shirt. This suggests the AV mode has detected the change in light? Files attached as above, in case there's any clues... IMG_1499.CR2 IMG_1539.CR2
  12. This morning I attempted my first flat calibration frames on my Skywatcher 200P, using a white tshirt and the morning sky at 7.15am. Setting my Canon 600D SLR to AV mode, I took 20 photos but all were completely black. I repeated the process with just one layer of the tshirt over the scope but still they were completely black. At this point, the sunlight was across the tshirt but still the images were completely black. I did check all lens covers were removed! Please can anyone advise what am I doing wrong?
  13. Thank guy's, that's very helpful. I have yet to take Flat's but am planning on doing so during the next session. Do you think that is the main issue with the gradient? I do suffer light pollution before 12am which is why I purchased the Svbony CCD filter. I wonder if it is this filter also causing the issue as I'm aware there are more expensive alternatives available. I really like both images above for different reasons - thanks so much for taking the time to show me how you would process the image.
  14. Here is the original stacked tiff file for the above image. Feel free to process and share tips/tricks with me! Autosave.tif
  15. Wow - thanks Adrian, this is really helpful! I too noticed that the black point was right across but I didn't want to blow the centre out anymore than it already is. Great info in your post that I will have a go at. I'll load the .tif file later tonight for anyone who wants to try their processing skills on it - it would be really valuable to see what others can do with it too. Thanks again.
×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.