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Rich1980

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Posts posted by Rich1980

  1. Hi,

    I'm after some advice please, my Dad is on about buying a memorable birthday present (not that I'd admit to reaching any milestone nor getting old!), as we share an interest in astronomy it feels an investment into this field would be something that would get used on something we both love and always be a fond memory.

    My question is being into astrophotography (although still learning it will be a consistent passion along with my other photography), what piece of equipment would be a good idea for a present that would be a long term item among my setup? I currently have a NEQ6 with a 200PDS, imaging with my dslr.

    All ideas are welcome regardless of budget.

    Cheers,

    Rich.

  2. On 30/11/2019 at 13:37, davew said:

    It just occurred to me Rich, today is the last day of posting to this challenge so if you did a bit last night then get it in quick :)

    Ah sadly not Dave, had a nightmare and took the wrong cable so I couldn't do any star trails sadly. 

    Running the camera would've been a bonus to be out with the scope so not all was lost. 

    • Sad 1
  3. 4 hours ago, davew said:

    I hope you can get out.

    I tend to do my star trails with the same exposure time as a single exposure. That way I can make a timelapse as well if I want. If you increase exposure times then timelapses are out but you may get more star colour and better foreground. Choices choices :) I then tend to do at least an hour and often more. You can always leave subs out but can't add them afterwards.

    Dave.

    I'm definitely out tonight for a few hours so watch this space. Thanks for the tips. 

    • Like 1
  4. Had a visit to WYAS a couple of Tuesdays ago, can highly recommend it too, we loved it and can't believe it was the first time as I'm only in Ferrybridge. 

    I don't often have much free time on an evening but will get back as and when time does allow. 

    • Like 1
  5. I've little experience of non eq mounted photography but can recommend getting a scope on an eq mount, as soon as you've sussed out polar aligning you're away. Computerised goto, especially from the phone or tablet makes it so easy. Downside there is a cost (£600 with power supply etc) but the best money I ever spent. 

    • Like 1
  6. 4 hours ago, ollypenrice said:

    First point: any deviation from perfect polar alignment will generate field rotation. However, if it amounts to less than half a pixel at the edge of field in the sub length you are using, will you see it? Put it this way, it won't be your biggest problem as an imager!

    Second point: if it were true that brighter objects needed shorter subs you'd be right. However, my own M42 used 15 minute subs and my M31 used 30 minute subs. Yes, both involved short subs blended in to capture the brightest details but very few objects can be done entirely in short subs. When I say 'very few' I should say that I have yet to encounter one.

    Olly

    Ah so like shooting bracketed photos to merge afterwards, how do you work out exposure times when working to 30 minutes etc? 

     

    I'm gonna need to buy that book for sure! 

  7. 4 hours ago, ollypenrice said:

    Yes!  This is the brilliant bit which allows you to guide to a fraction of a pixel, contrary to what might seem reasonable. You don't guide on a star, in reality, you guide on the 'centroid' of a star which is far more accurate.

    Autoguiding involves an exquisite bit of engineering which can turn a mount's natural error of maybe 30 seconds of arc into an error of maybe 0.5 seconds of arc. And this at a cost of a couple of hundred euros. It sets up a virtuous feedback loop of quite fantastic efficiency. Do it!

    Olly

    Edit

     

    You lost me with the numbers haha but fraction of a pixel sounds impressive. 

    And when the time may come to do delve into this, I've a orion 80mm scope I could use? Old laptop laying about, so would just need to buy a guide camera? 

  8. From looking around the forum I gather autoguiding is very popular and bordering on essential for DSO photography but I'm wondering how does it work? 

    Am I right thinking you point it at your chosen subject and it adjusts to any movement from that subject? 

    If that is the case, does a perfect polar alignment matter or will the autoguiding adjust for that too? 

    Forgive me too if this is a daft thread as it's all new to me!

    • Like 1
  9. So I've got my scope and mount sorted, along with a t ring and adapter. Now I'm waiting for the time to get out and use them but where should I kick off? The moon seems an obvious target to begin with, any other ideas for a novice? 

    Also any thing else that would help me to start with? Or stuff to read up on while the weather isn't great?

    Ta, 

    Rich. 

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