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About david_taurus83

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    Birmingham South
  1. That diagram means absolutely nothing in my experience. I get better results if I interpret it the other way..
  2. I feel the same. Gmail for example infuriates the hell out of me!
  3. I dont understand how an increase of x2 SNR is not beneficial? Unless theres another practical method that Pixinsight doesn't possess, that's a hell of a lot of subs to manually open up and bin. I collected 1200 x 30s subs on a target this year! Has anyone captured binned data and compared that to the same data, captured at the same time at full resolution but binned in software? I appreciate the maths might not stack up but isn't the whole idea of the hobby about creating pleasing images to the eye?! What I mean is how does one image look compared to the other?
  4. It's the Panasonic sensor itself that suffers from the microlensing so yes.
  5. Based on what vlaiv has explained above and what I've read elsewhere, the SNR on a CMOS is increased x 2 so I might just give "on camera" binning a go with my 102mm. I'll still have 2.78" pp resolution.
  6. Sharpcap lol Both times I tried the ekos version the final alignment star went off the screen so I gave in and brought my laptop out for Sharpcap with my guide scope. It takes me a few minutes to PA that way. That said, the Ekos version does use the main camera and scope. So might prove very useful if you were guiding via OAG and dont have a separate guide scope. Or if you dont have a laptop to bring to the mount.
  7. I use VNCViewer on my phone to control everything. I've had a go at the Ekos PA but found it a bit fiddly compared to Sharpcap.
  8. Thanks. I will have a look at IntegerResample. Would this be best applied to subs prior to stacking? I dont suppose it offers a batch method..
  9. Thanks vlaiv. I kind of get the first bit. CMOS binning does increase signal but it also increases noise by the same amount. Youd still need the same number of subs to overcome the read noise. So no real benifit apart from smaller files. In your example, the software binned image is on the left and the simple resample (50% down sample?) is on the right, yes? What process did you use to software bin? I resampled an image last night by 50% as the data wasnt good but I was mistaken by thinking this is what you refer to as software binning.
  10. Hoping someone can explain this in a bit more detail without my humble brain crashing. I've seen it mentioned a few times that the ASI1600 CMOS sensor doesn't bin in the same sense as a "traditional" CCD chip where the CCD gives the added increase of SNR. I've always assumed that when I select 2x2 with the ASI1600 that the capture software was "binning" the downloaded image. To my eye, the sub does look brighter and appears to have more detail. But I assume that the noise is also increased so all I've achieved is to make the image smaller with no real increase in SNR. I've seen @vlaiv mention on a few occasions that the subs could be processed as normal at full resolution and then could be resampled later in processing. Are there any steps on how to do this? Any comparison pictures out there? I've seen plenty of chatter about software binning but does anyone regularly use this approach? Currently, my image scale is 2.33"pp at 336mm and 1.39"pp at 564mm with my 2 refractors so no need to bin there. But I've been thinking about a longer focal length for small targets, galaxies etc. Something along the lines of a 6" RC at 1370mm but with an image scale of 0.57"pp. My guiding would surely be tested at that plus it would be massively over sampling with my rubbish skies. Hence the question at hand.
  11. The FITS header contains information like the exposure length, CCD temp, camera gain, your location, RA and DEC information, pixel size etc. Its pretty comprehensive. Each capture software has slightly different formats. I'm wondering if Artemis has put anything in there to indicate the rotation? I use Ekos for capture and Pixinsight for processing and both can display the FITS header. Do you want to post up a sub and I will look to see if Artemis has wrote anything into the header?
  12. Bryan, you say there is nothing in the file information. Do you mean the FITS header?
  13. I have never used Artemis but it appears you can tick a box so the software will output the file rotated 180°.
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