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stevepenny

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About stevepenny

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    Nebula

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    Grampian
  1. Hi, I'm having an odd problem when imaging Jupiter. I'm using a Canon 1200d piggy-backed onto an EQ2 mount with 75-300mm lens. I have tried various setting but I'm finding it difficult to capture the moons without Jupiter blurring due to its brightness. Short exposure Images where Jupiter is clearly defined tend to miss the moons and longer durations bring the moons into play but Jupiter loses clarity. The mount is driven (small battery operated motor) so I'm limited to about 45 seconds per exposure at 300mm at which point it starts to trail. Any guidance would be appreciated. Steve
  2. Hi All, To be fair to SW the 130p is suitable for astrophotography; but maybe not with a DSLR. A web-cam can achieve focus with the sensor 5-10mm outside of the focuser tube. I guess that a DSLR with an adaptor etc will end up with the sensor much further out and thus too far away from the FP. .
  3. Hi Happy-Kat, I'd read that somewhere else but couldn't understand the logic behind it. Now it makes sense. Thanks
  4. Hi all, Very many thanks for all your valuable advice; I'm glad that mirror lockup (or a lack of it) isn't going to be an issue, so I will be able to get the most out of what is an expensive gift. With regards Tinker1947's advice, I've ordered one; at £12 it's a real bargain so that was a great steer. Thanks again and clear skies
  5. Hi, My wife has bought me a Canon EOS 1200D for Christmas (although I'm not supposed to know) which I plan to use for general photography as well as some planetary imaging; maybe even some DSO's once I get the hang of it. However, having done some general research into the whole astrophotography subject; the perceived wisdom is that mirror lockup is a 'must have' in order to prevent camera shake. Sadly the Canon 1200D seems to lack this feature directly (i.e. there is no mirror lock up function) but there is a reference to a "2 second exposure delay - with mirror lockup". I have also found a review that says "Canon's tabbed menu system is very well designed and easy to use. Absent on the T5 (and T3) menu is the mirror lockup function. While Live View can instead be used to get this function, I do miss mirror lockup as it is one of my most-used features". My understanding is that even in live-view; the mechanics of the camera are such that the mirror still drops and rises again before the shutter opens!! Therefore if anyone can shed light on this; or whether mirror lockup is an absolute must, it would be very much appreciated.
  6. I think I know the answer; Image if you will three intrepid aliens from Tau Ceti, traveling to our planet using one of NASA's Space Shuttles with a 100 Litre water tank (I did say use your imagination so I have no idea how they got hold of one in the first instance). in the time it would take to travel to Earth the 100 litres of water would need to be recycled around 8.4 million times. Now that would certainly put me off. Assuming that these travellers could survive on a single pizza per day (nothing spicy please) then where do you put the 140,000 tonnes of pizza dough? IF one of these travellers has a likening for spicy pizza then the 26,000,000 litres of gaviscon (other rafting agents are available) might also cause a storage embarrassment.
  7. Hi, Does anyone have an opinion on using a Canon 1200D piggybacked on an EQ2 (Skywatcher 130 Newtonion) for astrophography. the plan would be to use a 300mm lens with as long an exposure as possible given the limitations of the mount which is RA driven. If anyone has any idea of what could be achieved I would be very grateful. DSO's would be my choice targets!!! Thanks
  8. For me the answer is very simple; Its reasonable to assume that life on other planets is evolving at around the same rate that we are. But assuming that there is a very advanced civilisation in the Tau Ceti system; and assuming they have a space vehicle that can achieve a near-light speed (assuming Einstein wasn't wrong) then why on earth (no pun intended) would they want to spend 14 to 15 years in space just to find out if there is life on this planet; particularly when there are a further 4 potentials within Tau Ceti itself. It never fails to amuse me that the human race is arrogant enough to believe that an intelligent being on another planet would want to travel 78 Trillion Miles (distance from Tau Ceti) to visit us; particularly if they have been monitoring our TV transmissions and think that Eastenders and Coronation Street are a true reflection of life on earth lol. Lets face it, how many aliens would mess with Tracy Barlow???
  9. Hi Qualia, Many thanks; it was my miss-understanding not your kind explanation. I ran it through Stellarium last night on 'fast-forward' and you are right; in june/july Lyra is much higher in the sky. I need to learn more about the celestial sphere !! Thanks again.
  10. Hi Qualia, Very many thanks for your comments (and also thanks to everyone else who commented ); how do you know that it will be better next year? I would have though that the position of the stars on the celestial sphere were fairly similar year on year; or will we be relatively nearer etc.
  11. Hi, Tonight and very much on a whim I decided to go and hunt for the Ring Nebula in Lyra......but I can't find it. Seeing was not fantastic due to the moon but with around 160 degrees of separation I didn't think that it would be that noticeable. I was using my Skywatcher 130mm reflector with a 25mm EP. I aimed right between the two lower stars in Lyra (almost managed to fit them both in the FOV) but could find the Ring Nebula. I tried a 6mm wide angle at the point where I thought I would find it but the resulting image was too dim to be of any use. Any guidance would be appreciated. I'm comtemplating a 10" Dob; would make finding it any easier or is this just too small/dim for my current setup? Thanks
  12. Hi Louise, This might help if you have time to reconsider; "Lenovo's X200 ThinkPad series is synonymous with portable productivity, and the X240 lets you get more done than ever without rushing to the nearest outlet. This lightweight laptop's built-in battery provides a good 7 hours and 40 minutes of juice, which stretches to a whopping 20 hours and 28 minutes when you upgrade from its 3-cell to its 6-cell battery. This endurance is the most we've ever gotten from a laptop without a sheet battery attached to the bottom, and makes the X240 the perfect productivity companion." Steve
  13. Hi Charic, That is a very kind offer thank you. As tempting as it is I'm not sure that my wife would agree lol. I should really join AAS but sometimes after along day at work a 20 mile x-country trip to Newtonhill is not always a welcome challenge; particularly when it's 'dreich' and there is little chance of observing.
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