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Datalord

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About Datalord

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    Proto Star

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    England
  1. I got interested in the Abell catalog and in August decided to throw some hours after Abell 262. This cluster is relatively small, and relatively close by, with a mere 200M light years to go. Which also makes it achievable with my modest equipment. I love these clusters and will do more of them. Captured from E-Eye using my RC and G3-16200 on an ASA DDM85. R: 46*180s bin2 G: 46*180s bin2 B: 44*180s bin2 L: 38*300s bin1 10 hours of data in total, gathered mid august. I found 53 fuzzies. How many do you see?
  2. Which is exactly why the answer to the question is "No". 2.26 degrees is not at all awesome if you're shooting galaxy clusters 200MLY away. My RASA is good for pleiades and Orion etc, but utterly useless for the Abell Catalog. My RC is doing great as a galaxy hunter, but would require a huge mosaic to get Orion.
  3. it is considerably harder to do when you can't use a flat panel because of the combination of blowing out the ADU and a mechanical shutter. I only have 40 min of light suitable for flats, IF there are no clouds. Last time it took me 20 days to coordinate a full set for all filters...
  4. yes, in an ideal world. My own experience tells me the downsampled flats work great.
  5. The resolution doesn't matter. They are used to calibrate the images and whether you are shooting at 0.1" or 15" is irrelevant. It's the resolution of the image itself, x*y, that needs to match, with the dust bunnies in the right place.
  6. You can go higher, as long as you're not clipping in the top. I start my run at 30k-40k at 0.5s and stop when I can't get it above 10k with 5s exposures.
  7. *raises hand* I have a 12" RC combined with a mechanical shutter. It's a pestilence to acquire flats. I can't use a panel, because it blows out the ADU, because the manual shutter only allows me to go down to 0.5s exposures. I have a grand total of 40 min at dusk to gather flats, so last round took me a month. Btw, I take them bin 1x1 and downsample in PI for other binnings. Works perfectly.
  8. I don't understand the fuss. I shoot at f/8 with my RC. Even at very modest 12" I have to pace my subs from blowing out with a G3-16200, so f/10 can't be that different.
  9. I would argue it is exactly like that, but the choice of changing is a matter of deciding how often you are willing to go through these motions. As someone who went through the motions of cheaper gear and pain, I will advice anyone to buy dedicated equipment for each purpose. Accept limitations, learn strengths and later expand to more setups. The fewer moving parts, the better.
  10. Late to the party, but as DaveS pointed out, I have been a CGX user. Not CGX-L, true, but the difference between those two is a bit of size, not actual mechanic ability. Stay FAR away from Celestron if you want "a lifelong setup". As to what others point out, the difference between long FL DSO and short (I have a RASA as well as a 12" RC) is unbelievably big. Everything is different. Deciding one night to change from hyperstar to long FL means recalibrating balance, new polar alignment, flats have to be done all over again, camera changed, unless you use CMOS colour, image processing is different. I could go on and on. DaveS had the wisest words: As has been said elsewhere in this thread, you seem to have your heart set on this Celestron setup, but lifelong it is not. You will learn a ton of stuff, you will have some good photos and it might be just great. But you will become annoyed over time and you will upgrade. That is my prediction. I can only hope you don't get Post Traumatic Mount Disorder with that CGX.
  11. I had a thread with a cmos and my RASA showing similar issues. I settled on atmospheric dispersion, which moves the red light different from blue. I suspect this effect is increased with aperture, so your 14 will be more susceptible. I had a whole thread on it earlier this year. It you do your collimation in mono or with a filter, and rule out any other mirror related issue, I suspect you will still see this problem on a cmos colour camera. Easy to correct in processing, so no biggie.
  12. I finally got around to finishing a proper take on M27. So far I have only had random shots, but this time I collected 13 hours of NB data on it. 19*1200s Ha bin1 3nm 20*1200s OIII bin1 8nm RC12, ASA DDM85, G3-16200 from E-Eye during July. Processed in PI and PS. Comments and suggestions welcomed.
  13. I think they show exactly why I find the drizzles better. Very notably, the contrast is larger, because the dark areas are darker.
  14. I'll post a +1 to all of what Dave and Waldemar said and say that the software part of the DDM is the weak link. Once I eliminated the horrible Sequence software, I have found this mount to be the closest thing to magic this side of Harry Potter. Like Dave mentioned, they stopped producing 60 and 85, so only hope for one of those is second hand and I since I can't see myself ever selling mine, I would be surprised to see anyone else do it. It is crazy good.
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