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The Power of F2 : HorseHead Nebula in 90mins


Catanonia

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4 minutes ago, 900SL said:

I've quite fancied a RASA as clear nights here are few and far between, but shied off given some of the horror stories I've read about Celestron QC. How have you RASA 8 owners found them (apologies for the slight side track.. I have ADD :) 

RASA 8  = On trick pony

Cons

  • Can't easily use filters without removing the camera and messing up your rotation / framing
  • Can only use certain size cameras
  • Cables can give bad stars unless you use something like the cable cradle I post above
  • Can't add on reducers etc
  • Can't visual
  • PITA to colimate and very sensitive to collimation / tilt
  • Personally I would not mono shoot due to the filter issue

 

Pros

  • F2 = FAST = Perfect for crappy UK weather with a OSC = nice images quickly
  • Wide FOV 400mm = great for nebulas
  • Relatively cheap (loads on 2nd hand)

 

I have owned many scopes, but the RASA8 is the one I have liked and used the most. The RC10 comes out for galaxy season in the summer.

 

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21 hours ago, Catanonia said:

Then stay clear of F2, this will make this more difficult as F2 is very unforgiving.

If I were you, I would look at getting some guiding sorted and move from there

I've got a guide camera and scope now. It's amazing the difference guiding makes. I have also upgraded to a Star Adventurer 2i, so my next attempt at the horsehead should be much better. 👍

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