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Icesheet

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Everything posted by Icesheet

  1. I'm wondering if anyone has any experience with landscape astrophotography with a cooled CMOS? I'm off to Utah later this year and I'm wondering if I should consider pairing my 14mm Samyang lens with my ASI1600mm instead of my DSLR. If anyone has any examples I would love to see them!
  2. I had a pair of these and let them go which I regret now. There was quite some discussion about this on the bird forum. However, at their price point the optics compete with the top of the line compacts binos so I guess they had to cut costs somewhere. For me that is evident in the slightly cheaper housing, lack of accessories and narrower FOV. That is something well worth living with if you don’t want to shell out nearly 3x more on the Zeiss Victory or Swarovski CL compacts. There were a lot of suggestions where to pick up suitable accessories at a reasonable cost. Enjoy them, great little bins!
  3. It probably means it’s been sold already unfortunately.
  4. Check this video posted on Twitter. He claims they would only be visible at dusk and dawn
  5. Do you think the AZ GTi would be able to guide that sort of FL? The main reason for 250-350 range was because it gave me something between 135 and 550 which is the FL’s of my other equipment. Wouldn’t rule it out though.
  6. Thanks all. Yes, I have seen it and I believe it’s the same one. I need to wait until I’m paid so if it’s still available then I’ll have a closer look.
  7. Thanks for the input @Davey-T . Do you have the Star71 too? Any preference for one over the other?
  8. It is a bit of click bait isn’t it The AZ GTi might struggle with a refractor that size! Will edit the title
  9. Thanks, the Star71 was one of my preferred options. Have you used it?
  10. Looking for some recommendations for a compact apo in the 250-350mm focal range. I had been intending to get a WO RedCat but there seems to be mixed reviews. Similarly the 71mm quad APO (WO/ Meade/ TS) seem to get very little or mixed reviews. I would prefer to not have to deal with focal reducers/ flatteners but will for the right scope of course. Plan is to mount it on an AZ GTi and image with an ASI1600mm. Any first hand experience with any of the above or anything you can recommend would be appreciated! Edit: No set budget but the 71mm quad at ~£1200 is probably my top end
  11. Thanks Steve, I’ll keep my eye out for the announcement then.
  12. Any idea how much the ASIpro will retail for and will it be included in the 10% off if it arrives during Dec?
  13. I’ve always wanted to attempt narrowband and in particular the Hubble palette. This is my effort on the heart and soul nebula’s with the Samyang 135 and ASI1600mm. 90x120 Ha 30x120 Sii 30x120 Oiii +calibration frames. I have to be honest, I’m not really sure how I got to this ‘final’ image as there was a lot of fiddling and googling going on! Looking for some honest feedback. My stars aren’t the greatest, mainly due to including an hours worth of Ha which wasn’t framed properly and had poor stars. Actually my corners (and focus) never seem to be great with my Samyang copy, so this is also cropped down. May have overdone it a bit with saturation and contrast and the background sky may be a bit too bluish? Will keep working at it and hopefully use any feedback from here! Edit to add calibrated and stacked Ha, Sii and Oiii channels. Alwys interested to see what people can do with my data. AutosaveHA.tif AutosaveOiii.tif AutosaveSii.tif
  14. I have received some good feedback from the Phd2 group on this. It seems I haven’t set up things properly and that may be exaggerating the backlash issues. Just need to wait for another clear night to see!
  15. Seems to me the HEQ5 would be the best choice for you as it would be a seamless transition. I would get a belt modded one if you do. I have to say personally, I have a draw towards the iOptron offerings just now. Part of me wishes I had gone with my instinct as I now seem to have potential issues with the EQ6-R I just bought
  16. I haven't guided for some time now but I was recently out guiding for the first time with my new EQ6-R. The first night I used an Orion mini guider with Altair GPCAM2 and the guiding I was averaging was 1.7"RMS. I spent most of the night trying to work out why as I had routinely guided sub 1"RMS with this on my old HEQ5. In the end up I only managed 40mins imaging time. However, the stars looked good albeit probably bloated. I had read about the PPEC function on the EQ6-R so the next night I decided to run AutoPEC on EQMOD to generate a PEC curve and load that to the mount so I could use the PPEC function and hopefully improve my guiding. I also used my main imaging set up of Esprit 100ED and ZWO ASI1600mm to give me the highest resolution I could achieve at 1.43"/px. I have loaded the PHD2 graph and log below. As you can see the first hour or so was used to record AutoPEC on EQMOD. This averaged 1.22"RMS error. When I switched to PPEC this dropped down to 1.02"RMS which although better still left me disappointed given that my HEQ5 gave better results and that was just a push the button and go job. I then ran the guiding assistant which I have never used before. Screenshots attached from that below. The main take home from it is that my mount seems to have excessive DEC backlash of over 7sec! I have to admit that I am no expert with this so I'm hoping someone with experience can look into this and advise. Is this backlash the main source of my poor guiding or is there anything else going on here? Can this be solved by optimising guiding parameters and perhaps balancing my set up better to counter it or is this backlash severe enough that it requires some mechanical attention? I'm really reluctant to get the tools out for such a new mount. As always any help or advice appreciated! Edit to add: •Not entirely sure what seeing was but at least average probably better • I believe there was a focus issue with the GPCAM the first night so that probably contributed to the poorer guiding the first night PHD2_GuideLog_2019-11-11_011955.txt
  17. You could always go for the CEM25p at £725. Still guaranteed +/-10 arc sec or less. That should be plenty good for unguided exposures at 135mm. Plus you have your guiding set up anyway .
  18. That looks like a fantastic little set up! How do you find the CEM25 EC? It’s been interesting me for a while as a set up for my ASI1600 and Samyang. Gets tiresome pulling out the EQ6 for that.
  19. Great image Im curious how you focused the lens with the ZWO EAF?
  20. I think most people looking for an astro camera at that price point would normally be a fairly serious astrophotographer and be looking at the CMOS/ CCD offerings. I would have thought there would be more interest in a moderately priced astro APS-C sensor camera for beginners/ intermediates. Having said that they have periodically released Da’s and Nikon had the 810a. Considering the mark up on the regular model no doubt they’ll make money from the ones they do sell.
  21. Officially released now https://www.google.co.uk/amp/s/www.dpreview.com/news/4797098001/canon-unveils-the-eos-ra-a-full-frame-mirrorless-astrophotography-camera.amp
  22. As far as I’m aware you can’t purchase a copy outright anymore. You used to be able to buy the old version but it’s not available anymore at least through official channels. You might be able to find a version somewhere but you’ll still probably pay around two years worth of subscription and not get any support if there are any issues. If you really don’t want to pay a subscription you could consider PixInsight or one of the free processing packages Edit: @Buzzard75 beat me to the post button but as he says basically!
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