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About c3po

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    Odiham, Hampshire

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  1. Ahh, yes indeed! The camera's own lens needs to be removed also for it to reach focus on the'scope, didn't think of that myself, good shout Pat!
  2. hi Fazerdenzil, and welcome to SGL. Firstly, as you may have gathered already, the BigBoss isn't the best of scopes, but as they say, any 'scope is better than no 'scope! Yes, you should be able to use a webcam with it, any should do but CCD are best, although a CMOS will work fine, dependent on its low-light sensitivity. Either way, the Registax software will be your best friend here in enabling you to stack individual frames from your webcam footage and provide a reasonable image as a result. Webcams are generally only used for planetary imaging due to their limited sensitivity and exposure
  3. Very good point, didn't think about that. I've just checked though and the week we're going (22-29Aug) is around the new moon - great news! Sent from my GT-I9305 using Tapatalk
  4. I'd agree with this to a point, 240mW is a substantial load for a Carbon pot to dissipate, although most sold should take the load well, but as you note, for how long is another thing entirely.A wire wound pot like this one would certainly fit the bill better.
  5. Spurred on by Gina and others experiences with 3D printers, I've set about searching out the cheapest one available for my basic requirements... and I think I might have found it! The PrintrBot Simple runs in at just £300 inc. VAT. It does, however, have a maximum print size of just 4 inches in each dimension... pretty small I agree, but more than enough for my very basic needs. Here's what RoboSavvy have to say about it: Could be worth a look. What do we think?
  6. Having tried widefield piggy-back AP with the Celestron the RA tracking motor, i know what you're attempting, albeit at a higher zoon with the 300mm lens. However, the theory is the same, and I quickly became tired of the restrictively short exposures i could expect with the DC motor - i use a Sony A200 with a CCD at a 1.5x crop factor and i was getting 30-50 seconds at best, no thanks to the DEC error and Polar Alignment tweaking needed and Periodic Error in the mount coupled with the faff of getting the tracking rate of the DC motor correct. After some disheartening results with the piggy-b
  7. Thanks Alan. My unit is finally fully functional and ready for its first use in anger. Just bought a T-ring for my dslr and sky glow filter... Just need some clear skies and a night off work (I've been on nights for the past few weeks :-( ) to try it out. Sent from my GT-I9305 using Tapatalk
  8. May I throw a spanner in the works? I have the Celestron 130 and accompanying motor drive, and sadly, it's not as easy as attaching the drive to the RA shaft and switching it on. The MD has, in addition to its North/South switch, a speed control knob that you turn to adjust the tracking rate of the motor. Getting this set perfectly took me far too long, and as the battery voltage wore down, so the speed decreased and further adjustment to the speed controller was required....
  9. There are a couple of options I think for this, but the most basic would be to introduce a simple voltage divider I the guise of a variable resitor (also called a linear potentiometer) between the battery and fan... By turning the dial on the potentiometer you increase/decrease the resistance in the circuit and therfore reduce the voltage output to the fan, essentially giving you a variable speed controller for the fan.
  10. Hi all and thanks for the suggestions. Over the past few weeks we've been researching places in the area and finally settled on a lovely place near Bellingham, less than 9 miles from Keilder. It's on the site of Hesleyside Hall and advertised as Reivers Rest. With landscapes like those above designed by Capability Brown surrounding the cottage, finding a dark sky shouldn't be difficult at all! Sent from my GT-I9305 using Tapatalk
  11. I used the original PCB as supplied by AstroTux for my project, and updated the code to include micro stepping and brightness controls from files supplied recently by AstroTux via email. The only extra components needed for my unit were the project box, a selection of gears and shafts to match, push button switches (3 of), solder tags (not mandatory but makes things easier) and, finally, the stepper motor. The motor is the crucial item, it MUST be Unipolar, run from a 12v source and must have enough torque to move the scope on the mount - read the documentation and the rest of this thread for
  12. Cornelius, many thanks for your help. I had thought this was the case, but most of the documentation for both applications refer to pressing the "E" or "W" buttons, i assume this means causing the mount to slew Est or West respectively? If so, i can do this manually with my RA Drive control pad. However the manuals for both also discuss stopping the RA drive completly, the only way i could do this (at present) is to pull the power from it, not ideal i guess, but it will suffice for drift alignment. I note that both say they will work with any WDM compatible webcam, but would the like of an xb
  13. Anyone? ..... Please? Sent from my GT-I9305 using Tapatalk
  14. Not entirely sure if this is the right place for this post, but it is with relation to setting up for basic prime focus AP with a dslr... I have a celestron 130eq on an EQ2/CG3 mount and have been able to drift align, albeit not entirely accurately, as before i lacked an ra motor that tracked at sidereal speeds (it was a basic dc motor). I now have one thanks to AstroTux diy build and have tried again to drift align my scope with it, but still my accuracy could do with some assistance to allow some long exposure AP without the blurring or small star trails I'm still getting. Now, before I ge
  15. Many thanks Steve, this is very similar to what I am doing now and it takes quite a while with my non-live view camera as I've got to manually download the files to view them on my laptop. All the while this is eating away precious exposure time, but as i said before I think I need more live data on screen to help narrow it down much quicker. Hence my thinking that a webcam and one of the softwares above would tell me where i am going wrong sooner. Also, I don't think my case is helped much by my views South being nonexistent and eastwards blocked by a large tree in the neighbours back garden.
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