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  1. This is what I did with the pictures in the orignal post. I will add more 7min exposures to see if i get something better but so far my 3min no filter stack looks better.
  2. Thanks everyone for the input. I do know that I'm only using 1 out of 4 pixels but it should not matter in my case since it is the same wether I use the Ha filter or not (The Ha is still mapped to the red pixels even without the filter). What I was hoping to achieve was get a better signal to noise ratio without having to expose for ridiculous amounts of time. I will try to add more 7min subs and see if I can get a better result but so far it does not look better than my stack of 3min subs without the filter.
  3. Hello everyone, I recently bought a Svbony 7nm H-alpha filter and I have been playing around with it with my modded DSLR. Since I'm new to narrowband imaging, I have a couple of questions regarding the results I obtained: 1/ Here is a stack of 7x7min exposures ISO800 (red channel only). Is it normal that my background is not dark and very grainy with the filter? Maybe it's because I'm using a DSLR which I know is not the best way to do things but I was hoping there would be more contrast? Here is a stretched version: 2/ How should I stack the images? Just
  4. The Horsehead Nebula - A work in progress About 25 x 3 mins unguided subs because my ASI120MM works 1/10 times with PHD2. Canon 1200Da + 72ED Pro + CLS Filter Will try to add more time if/when my gude cam decides to cooperate. I also bought a SVbony Halpha filter that I have to try out properly and the combine the two to create an HaRGB image
  5. Very nice image! I see you have a C6 in your signature and I have been tempted to buy one to put on my AZ GTi. Do you use it with the mount and how does it perform?
  6. I'm in a similar situation as OP and very interested in this thread. Correct me if I'm wrong but a 1min exposure without an Ha filter should contain the same Ha signal as a 1min exposure with a filter right? As far as I understand it, the point of narrowband filters is to let you expose for longer thereby increasing the useful signal(the DSO) compared to unwanted signal such as light pollution or sky glow. Is that correct?
  7. Yes, you should be able to guide the mount without any issues with the 120MC-S and guide scope you mentioned
  8. I've been enjoying my AZ GTi too. Personally i'd say that you cannot get a better guided setup at this price point. The only issue I have with the mount is the lack of a polar scope but other than that I'm pretty happy with it.
  9. The Great Orion Nebula and the running man nebula - 20 x 120s subs at ISO400
  10. I used that sigma lens this morning to capture the comet and it did pretty fine. However I was using my star adventurer mini too I did 15s exposures.
  11. How about some budget astrophotography for us people who have modest equipment
  12. Thanks! Yes, the weather has been all other the place in France lately. And I'm in the south of France, in the pink city ^^
  13. I got my 72ED pro a couple weeks ago but the weather has not been nice and I have only got 2 sessions out of it so far. The whole setup balances quite well on the AZ-GTi and stars are nice and sharp! There is still CA but much less that any of the lenses I have which is an improvement for me. So far I'm happy with the setup M51 - Whirlpool Galaxy => 150s subs ISO400 from my light polluted sky for a total of about 40min M27 - Dumbbell Nebula => 150s subs ISO400 for a total of around 1h. There was a thin layer of cloud when I imaged this target which took away some details
  14. Be careful though cause the AZ GTi has a weight limit of 5kg. it's a really nice little mount and I'm having a lot of fun with it. Here are a couple more shots taken with my Skymax102 M104 - Sombrero Galaxy M57 - Ring Nebula
  15. Well looks like i'll have to buy a 2in UV/IR filter then. More expenses coming my way
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