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Roysten

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About Roysten

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    Hull

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  1. Something like this may be helpful too: http://www.ebay.co.uk/itm/like/172283387733?lpid=122&chn=ps&adgroupid=40176066202&rlsatarget=pla-279594455985&adtype=pla&poi=&googleloc=1006816&device=c&campaignid=738210941&crdt=0
  2. Hi Peter I think to film in 5× mode you want to be pressing the following button once when in video mode. You should see a little image in the bottom right of the LCD screen that then says that you're in 5× mode.
  3. Hey @hornedreaper33, that a Dungeon Keeper reference there? I think a lot of people generally use a polar scope, which you can pick up for ~£30 depending on your mount, FLO and 365Astronomy both sell one for my EQ3 mount. I've heard good things about Polar-Master's but they look very expensive! Before using Sharpcap I was just using my finderscope and aiming about 1º away from Polaris in the direction of Dubhe and Merak in the Plough, admittedly very crude! @The-MathMog, I used my ASI120MC with a 0.5× reducer attached to my Travelscope 70 to get the alignment then switched to my 150P and DSLR to capture the main images. Probably be better if I could mount my smaller scope ontop of my 150P but I don't really have all the necessary attachments. Hi @astrosathya, the light pollution is made near me too! To get many stars at all I was having to use an exposure time of 5 seconds and gain at near 100% to get a lock. Seeing was pretty fair, better than the other time I tried it. Will be interesting to get a little into the country and see if it's any easier.
  4. Good to hear your story Peter! Pictures are great too, quite the catalog of objects!
  5. I know the feeling Mikey, I check Clearoutside several times a day. It's sad that I'm beyond being surprised when the 100% cloud cover stretches off into the future. Sometime I wonder about recommissioning my scope as a coat hanger!
  6. Good effort Ger! My first images were taken using my smartphone, I really struggled to get much of anything in view and the images didn't improve as my hands got colder! Hope you're able to get out and take some more, it's very addictive once you get going!
  7. Over the last few months I've been trying my hand at imaging DSOs, in learning to do this I've found that you really can't get away with exposure times longer than a few seconds without motors and a solid polar alignment. Initially I tried this by eye using Polaris, the best I achieved was around 8 seconds of exposure before the inevitable drift of whatever is in my view. I thought about buying a polar scope or learning the drift technique, then I happened upon the polar alignment facility in Sharpcap 2.9 on this forum and gave it ago. Jut thought I'd write a few things about how that's gone for me. Firstly I tried using the software with my 150P with a field of view of <1/2º, unsurprisingly this didn't work; I just couldn't see enough in the field of view for the software to lock onto anything. I calculated the field of view of my 70mm Travelscope with my cam and still found it to be shy of the 1º requirement. So I bought myself a cheap 0.5× reducer to achieve ~1.8º across field of view. As most people have found the weather has been shocking with weeks of cloud at a time. Since I got the reducer at the beginning of Feb I've only been able to get out three times. It's only on the third time late last week I was able to finally achieve a polar alignment using the software! It took me over an hour; the light pollution in my subburban part of Hull is pretty bad and the software was rarely able to consistently detect the same dozen stars with every refresh of the image. I had to have my gain quite high with an exposure time of 5 seconds to get much out of my images. I was getting quite a bit of noise in the images but increasing the minimum star-size in Sharpcap from 1 to 2 pixels seemed to help. Quite often I'd get a lock for the first RA angle but not on the second, which was very frustrating. The times I got a lock from both angles were then hampered by the lack of the yellow line, which dictates which way to move the Alt-az and altitude on my mount, obviously in those instances I was very far away from the NCP. It isn't an overstatement when I say I was over the moon once it finally locked onto the correct point! I achieved a PA less than 1" from the NCP, I have seen people who have achieved much better than that but this has been an order of magnitude better than anything I've done previously, where I was lucky to get within half a degree. For those who struggle with PA I can definitely recommend the Sharpcap feature, it is fairly intuitive, easy to use and quick. To show the difference it can make I've attached an image of everyone's favourite - M42. Multiple other problems with the image aside I'm pleased with the improvement of the image with good PA compared to the one by eye. Both images were taken as 30 second exposures on a motorised mount. I hope this is helpful for those who have struggled like me and I'd be interested in hearing other people's experiences with PA.
  8. Hi Peter I've not had a shot at Jupiter yet this year but my brief efforts on Venus have shown how much the quality can drop when imaging near the horizon. Like Art Gecko I'm eagerly waiting for April for it to be higher in the sky. I've never imaged it with a DSLR but I have with a ASI120MC and got these kind of results. I found that getting a Bahtinov mask was a big help for focus and lowest exposure rate possible to prevent blurring and over-exposure, though for you taking a video and looking at the image over exposure does not look to be an issue. I used an old Logitech webcam at first which was ok but the low resolution meant that to get any detail I had to use 5× Barlow lenses, which made life difficult, especially before I got my motors! My experience with the ASI120 has been positive, I read plenty of reviews including on here before I bought it and for me it seemed the best choice in terms of costs and what I was looking to get out of it.
  9. Am enjoying following this thread, some great pics being posted! Got some new kit and got out for the first time in weeks last night. A single sub of everyone's favourite - Orion at 15 seconds with contrast as only post-processing. Rough and ready but a nice demo of what the kit can do. +1 for the EQ3 mount for DSOs
  10. Hi guys, it looks like it's going to be a clear night for awhile tonight so hoping to get out and try the polar alignment tool! I know the best solution will be a guide scope or 0.5 reducer but for tonight do people thing that a FOV of 0.69 (0.85 diagonal ) will be ok for the alignment?
  11. Glad to hear you're getting some good images, I've been buying various bits and bobs to improve my images but have had nothing but cloud for the last fortnight, am guessing Hornsea had been the same. You been able to out much?
  12. Cheers guy! Am very grateful for the comments and suggestions, just need a clear night to get out and try them!
  13. New moon, no wind, ideal for observing... but yeah, clouds make it impossible. I whole-heartedly share everyone's frustration!
  14. Thanks for allowing me to put a few numbers to the situation @kens! Definitely gives me a bit more of an idea how to quantify any improvements I make. Just need a clear night to get out and try and do a better job!
  15. Hey Waldemar You had my worried so I went to double check. It's actually almost bang-on 55. I think the angle I took the image at made it look higher. 55 is still obviously higher than 53.75. Would that 1.25 make a big difference to the quality of the PA? If so then either my finderscope (that I was using to track Polaris) isn't aligned properly or what I was looking at wasn't Polaris!