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riklaunim

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About riklaunim

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    Abathur

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    http://www.rkblog.rk.edu.pl

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    Male
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    Poland
  1. I have few questions about the Panasonic and IMX294 big DS cameras. First of all - is anyone using Touptek/Rising Cam/Altair cameras with those two sensors? How do they perform and is the software/driver side stable? Do they work with FireCapture aside of ASCOM imaging apps? As for mono ASI1600 and alike cameras - do you get any pattern when trying to do a flat frame or lunar/solar imaging at very short exposure with high gain? (like 10-20ms with very high gain and then moving it lower)
  2. Long overdue telescope presentation: https://rk.edu.pl/en/showcasing-my-planetary-dall-kirkham-telescope/ Also note that I moved my site from rkblog.rk.edu.pl to just rk.edu.pl - with SSL and other improvements. Old links redirect to the new ones.
  3. If it works then ok. I prefer a laptop - with fast storage, not limited to Linux only and in fully working case and in EU the price will be higher too from vendor US price.
  4. Dedicated planetary telescopes aren't produced on such scales as your average fast Newtonian so the price gets higher. Add a low volume high quality small company and the price goes even high. f/12 is still good although the aperture could be bit bigger. f/20 can be problematic as planetary cameras get smaller and smaller pixels. There are some Sony big pixel sensors, but those are only in PGR cameras at the moment.
  5. Just note that GigE won't work at GigE throughput as it's limited by chip internal throughput (which is shared with USB and USB based WiF/BT). For a board to have USB3 or other desired connectors - the chip must implement it. Most of ARM chips is made for low power mobile or embedded use and things like USB3, SATA3, high throughput interfaces, PCIe aren't implemented. It's better to just use a simple x86 based PC with a low power CPU. It will cost bit more but it will provide desired features. Raspberry capable of handling USB3 planetary cameras with fast storage connector to a SSD with unhindered networking will require much newer and more expensive chip - and that's not the goal of this project. Recently I got two boards from Aliexpress: Blue one is $86 and green one was $90. Both have low power Intel "tablet" chips. Blue is ready to use with on-board RAM and eMMC, while green needs one DIMM of RAM and some storage - in this case mSATA SSD. But still a better option may to but a nettop (barebone) PC in a nice package.
  6. When you combine measurements into RGB you can also pick fourth measurement as luminescence (no matter what "channel" it was assigned).
  7. You can check QHY5R-II as well as ASI034 for the cheapest dedicated cameras. Way better than old webcams.
  8. In general they got to old - low availability, drivers problems with modern Windows as well as dedicated cameras showing up even at entry level prices.
  9. There aren't any webcams for DS astrophotography. To do that you need way better cameras or a DSLR body and usually a guided telescope on an EQ mount. Cheap cameras/some webcams allow only to photograph Moon and planets.
  10. To fit it reasonably on a balcony DK build will likely fail and my other options are either Newtonians or second hand GSO RC. I don't want to go back to SCT as their closed OTA doesn't handle local night temperature drops efficiently.
  11. I'm looking at a f/4 12" Newtonian, mostly for Solar System imaging. Skywatcher has Quattro, while GSO has their own much cheaper f/4. The question is - which one is better, more rigid, that do not flex/bend? Older GSO like the 8" did commonly flex.
  12. All the 65/420 quadruples are from the same fab. They may differ in paint and accessories. Without any corner cases each should perform the same. WO66 dublet/triplet isn't the same thing and will require also a field flattener.
  13. riklaunim

    Neximage5

    It works, but it's not as good as newer cameras (like ZWO/QHY/Altair 224 based cameras)
  14. If you stack enough frames there is no difference between 12/14 and 16 bit. Even 8-bit planetary images from big sets produce 16 bit stack without problems. As for CCD vs CMOS - the CMOS are the current and future technology. CCD are slowly going out of the market as they can't go as far as CMOS technology.
  15. For imaging there is in general no difference which design you pick. The key element is aperture - more is better. What the design may affect is the thermal stability, ease of collimation (and it stability) and alike. For 6" Mak is getting to big while SCT is almost big enough to be optimal I would pick SCT, but likely trying to find a 8" OTA.
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