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About sony500

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  1. Hi, I think, in my limited experience, that a UHC can be used for galaxies. I believe that the light pollution would clog up your image even though it is B&W. This is not a great picture but it was taken with a DSLR and a Baader UHS-S filter. Unfortunately the color sensor combined with this filter turned my M51 blu but it could be converted into grayscale for B&W. Still I think that the contrast between the subject and the sky glow of the city where I live is very good considering the brightness of this galaxy. BTW I got this from my FB page so its a lot smaller than the origina
  2. Found it! Hope this works... http://stargazerslounge.com/topic/225556-m42-ha-rgb/
  3. Thanks to all for the warm welcome. Thanks also to Singlin for complimenting me on my english. My mum was a Londoner & I schooled many years in Tanzania in an english speaking International School. As for the images I have started seeing some great images from some of the guys on this forum. I hope that one day I could just get close to some of them! I have already tried to open some new discussions & posted an Ha RGB image of M42 taken last autumn, so if you manage to find it (I am not yet familiar with the forum) you can see the last attempt I did. At the moment I am revolutionis
  4. A snap from autum 2013. Can't remember much of the details. Celestron C8 with focal reducer f6,3. Ha as luminance. Modified Sony a500, 3min and 6min exposures, to try and cope with the high dynamic range of the subject. ISO??? not too high thogh I try not to go over 800. Guided. Processed in pixinsight. Had a lot of problems...I think I actually created a missing channel from the data that I had!! Not perfect but not bad for a first attempt at this type of exposure.
  5. Thanks, Interesting tutorial. I have tried Ha RGB with my DSLR. I followed a pixinsight tutorial to process the image. I found a stage where the RGB data was put slightly out of focus. I hate the amount of time spent on the RGB part as chances increase that something goes wrong, clouds come, humidity...and leave me with a B&W. I was actually thinking of increasing the ISO sensitivity of this stage to drastically reduce the exposure time. Increasing the ISO will make the image more grainy (so I try to use the best compromise between time and senitivity) but if then I soften it anyway a
  6. I have recently marked my position by placing some tiles in my garden, it makes a big difference to be able to set-up with the daylight and be already very close. I have also used the simple technique of shining a torch on the other side of the polar scope to see the constallations. Turn the RA to more or less their positions and then centre polaris in the circle. A "precice" rough polar alignment. Then I use alignmaster to get it spot on. Recently I started using webcams to avoid fumbling around in the dark and risking to bump my scope. Anyway, I am at my PC so it just makes things a lo
  7. Last year I tried to image M42 with RGB and used the Ha filter as the L. I was pretty pleased with the results. I have read about people adding this kind of filter to their LRGB imaging to reduce the light pollution that, unfortunately, even I have to put up with. I have a Baader UHC-S filter and I was wondering if I could combine it with my Ha RGB method or if the double filter would ruin my Ha snaps. I dont want to remove it just for the Ha as this would create a lot of other problems: rotation of the camera, different spacing, major re-focus. Once I start snapping I just want to turn the
  8. Hi everyone! I bought my Celestron C8 several years ago and have been playing with it during the winter months ever since. Every now and then adding new pieces of equipment. I wanted to get into the imaging from day one but the simple fact of life is that you end up having to learn tons of stuff first and spent time looking down the eyepieces and inserting barlows and stuff to see what would happen. To make things worse my goto hand control went on the blink almost straight away and waited almost a year trying to get it replaced. During this time, desperate to use and learn about my telesco
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