first timer

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  • Member since
    August, 2013
first timer
Posted by Brucey on Thursday, November 14, 2013 6:42 PM
I have a celestron 130 and a canon 600d with T ring ect. Iv had a few shots at our moon now i want a crack at the orion neb. Once im polar aligned and on orion will i need a barlow to focus on it? Also what length exposures can i get away with as i dont have a motor on my eq mount yet.
  • Member since
    November, 2009
Posted by Poppa Chris on Friday, November 15, 2013 8:28 AM

No Barlow needed.   In fact, a focal reducer may be more in order.  M42 can be a larger target than most pople realize from the visual view they get in thier scopes.  Going with a wider field will allow longer shots than otherwise possible without tracking. 

I would suggest maybe ISO 800 or 1600 and try 30 seconds.  If the stars start to trail, shorten the exposure to say 20 seconds or even 15.  If not, see if you can go to 45 seconds. (I really doubt you will get any longer shots than that.)  That's the beauty of digital photos.  If you don't like them just delete them and try something else.  FYI:  ISO speeds higher than 1600 will introduce a substantial amount of digital noise into the image.  You can try it, but just be prepared for the grainy results.

---Poppa Chris---

Denham Springs, Louisiana USA

"Second star to the right - Then straight on until morning!" - Peter Pan

Celestron CPC1100GPS (XLT) - 279mm aperature, 2800mm Focal length. (f10) Celestron Ultima LX (70deg AFOV) Eyepieces 32mm thru 5mm, Canon EOS Rebel T2i DSLR, Backyard EOS imaging software, Orion Star Shoot Planetary Imager IV, Celestron Skymaster 15x70 binoculars

 

  • Member since
    August, 2013
Posted by Brucey on Friday, November 15, 2013 6:17 PM
Thanks pops. Iv been meaning to do this for a while but with the weather and all i never seem to get the time. I will let u know how i got on hopefully with a pic.

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