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About Buzzard75

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    Proto Star

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    New Bern, NC

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  1. I agree, it shouldn't be that far off. The scope I have is a WO Redcat and the mask is the one that came with it. Sometimes it's just off for some reason. It's integrated into the lens cap. I guess it's possible that when I put it on, I didn't get it flush and perfectly perpendicular to the imaging train which may throw off the Bahtinov pattern. I don't know. I've never actually attempted it or seen anyone else show that to be the case. Might be worth looking into. I've just defaulted to using the Bahtinov to get close and then using the AF routine to guarantee the stars are as small as possib
  2. I will say this for a Bahtinov, it will get you close, but it's not always perfect. I have found a number of times that I can nail focus with a Bahtinov and the stars look good with an auto-stretch in APT. However, when I check the same image in Pixinsight, I find I have holes in my stars meaning my focus is off. I don't trust Bahtinov's any more. I will use them to get close and then run an AF routine. It seems to perform better. As for refocusing throughout the night, it's already been mentioned, but temperature and seeing conditions changing throughout the night will affect your focus and i
  3. I was doing a write up for my club about the Slooh service and thought I would share it here as well, with the images I've processed over the past week and a half. Between all the LRGB frames, there probably isn't much more than an hours worth of data in each image. Some have considerably less. You can of course put as much time as you want into them. The presets discussed below in the write-up are typically binned 3x3 for LRGB, but you can run a mission specifically for 2x2 binned Luminance frames. This was generally what I did in most cases and then just drizzled everything back to 1x1 scale
  4. As far as NASA goes, I'll just leave this right here...
  5. About two months ago I took out my eVscope while my imaging rig was working away. I don't always get it out, but it seemed like a good opportunity. While using it, I noted some issues with image stacking. It would regularly fail to integrate the image. It appeared to be caused by a backlash issue causing the target to drift and not allow proper registration of the star field. While adjusting to recenter the object, it wouldn't appear to move at first and then would all of a sudden jump across the field of view or out of frame. I contacted Unistellar and within a few days I had a return label t
  6. I have the CEM40EC myself. It works really well with my Redcat. I'm really pushing the limits with an 8" RC though, and wish I had gone with the CEM60 now. Even if you don't get the 11" newt mounted, I think you'll be happier with a 60 or a 70 over the 40 if you go with a bigger scope.
  7. Thanks! I wanted to give the wider view so you could see where it would have been in the overall image and then, of course since it's so small, I thought a close-up would be good too.
  8. I learned a long time ago to never post your first edit. After staying up late the night before and working all day, I began processing my data. It wasn't terrible, but I wasn't thrilled with it. After getting a much better night's sleep than the previous night, I decided to give it another go this morning. I am much more pleased with this result. I used my WO Redcat and a set of ZWO narrowband filters. For such a small scope and cheap set of filters, the data turned out exceptionally well. If you include the luminance data, I captured over 9.5 hours of data on this region in a single night. I
  9. It's been a while since I imaged the sun. Finally had the time and a break in the clouds to catch a glimpse of AR2785, AR2786 and AR2790. ZWO ASI183MM Lunt LS80THa iOptron CEM40EC Captured in SharpCap, processed using PIPP, AS3!, RegiStax, and Photoshop
  10. @wimvb, @Laurin Dave, @dodgerroger, Appreciate all the input. I haven't figured it out yet. I took new darks, new flats, and new dark flats the day after I imaged so them being old wasn't really an issue. I have used Pixel Math to fix the symptom rather than the cause per that video series, or so I thought, but the end result didn't really change all that much. I can get a decent individual sub calibrated, but when they're all stacked it just isn't right. I still think there's something wrong with my dark frames which is making it worse. I'll just have to keep at it.
  11. Take a look. As best I can tell everything is identical as far as the imaging properties go. Gain, temp, exposure. I don't see anything for offset specifically beside BZERO. Lights Header: Image #1 SIMPLE = T / file does conform to FITS standard BITPIX = 16 / number of bits per data pixel NAXIS = 2 / number of data axes NAXIS1 = 6088 / length of data axis 1 NAXIS2 = 4052 / length of data axis 2 EXTEND = T / FITS dataset may conta
  12. Darks look fairly similar to the previous ones taken about a month ago. See the notes below about the mean and median values. It may explain why they are slightly different. Mean and median of my darks is around 437 for my last set. Mean and median of my lights is around 334. Ruroh!! For fun (and comparison) I looked at the mean/median of my darks from a session a month ago and they are around 873. The lights were around 985. Based on those two sets of values, it would seem something is amiss with my last set of data. Actually, my last two sets of data as my lights for the pr
  13. See #1 under Darks. Yes, I've tried DSS and the result is the same or at least similar. When I try and stack in DSS it can't integrate the light frames because there aren't enough star pairs because the images are basically all black. That to me suggests it's a file issue and not a program issue. I'm not familiar with Pedestal, but I'll look into it. Thanks!
  14. This was a tough one. I've been having a ton of problems getting my lights to calibrate with flats and darks. I gave up on using flats for this one and just went with the darks. QHY247C w/ IDAS NBX filter Astro-Tech 8" AT8RC w/ Teleskop 1.0x flattener ASI178MC and Astromania 60mm for guiding iOptron CEM40EC mount Processed in Pixinsight and Photoshop 74x180s lights, 20x darks
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