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kecsap

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Everything posted by kecsap

  1. I have a Datyson T7 camera, I used for some time with a QHY miniGuideScope, but I think it is a bad camera. It is very noisy and it is not very sensitive. A mono ASI120MM Mini is lightyears better what I use for the same guidescope now.
  2. Uncooled ZWO ASI178MC camera
  3. Hi, I completed a small 3D printing project yesterday to have a cap for my Star Analyser 100 filter while it is permanently fit on DSLR lenses. Here it is the 3D model if anybody else wants to print such cap for a filter: https://www.thingiverse.com/thing:2834248 Csaba
  4. @happy-kat: I think the Star Discovery is just a "rebranded" or newer revision of "Skywatcher AZ Goto" mount head although the former is black and the latter is silver. The motor resolution means how much arcsec is 1 microstep with the motor. EQ mount heads are around 0.1 arcsec. Errata: My Virtuoso mount reports 1.5 arcsec for motor resolution.
  5. Update if anybody else will face to the same question: Skywatcher Merlin Weight: 1.75 kg Payload: 4 kg Motor resolution: 0.8923 arcsec Skywatcher AZ Goto Weight: 2.20 kg Payload: 5 kg Motor resolution: 0.8923 arcsec Skywatcher AZ GTi Weight: 1.3 kg Payload: 5 kg Motor resolution: 0.625 arcsec Celestron LCM Weight: ? Payload: 3 kg Motor resolution: ? Skywatcher Virtuoso Weight: 3.7 kg Payload: 4 kg Motor resolution: 2.42 arcsec
  6. Thank you for the tip, I did not know about this site!
  7. Hi, I currently have a SW Virtuoso mount, but it is too heavy (4 kg) and I would like to buy an other lighter Alt/Az mount. What I care is the mount head weight and I don't care about the max. payload. Unfortunately, the Celestron/SW specs are lacking in this regard. Can you help me to get only the exact weight of the mount head (without telescope, handset and tripod) if you possess the following? Skywatcher Merlin - ? Skywatcher AZ Goto - ? Skywatcjer AZ GTi - 1.3 kg/2.86 pounds Celestron LCM - ? I googled a lot, but the specs normally unclear about this.
  8. I search for Skywatcher Merlin Alt/Az Mount. Preferably, tabletop version and shipping with Hermes. My location is Tampere in Finland.
  9. The sensors are only there because they were very cheap and easy way to create a small weather station over the allsky webcam function. In a longer run, I will see how I can use them for automating some things with my imaging sessions. Set up alerts based on sudden raining/snowing or similar. And it was fun to make it work!
  10. Old topic, but I was lazy. I finalized my allskycam for now. I added a pressure sensor next to the humidity/temperature sensor. The station's own web page: http://zenallskycam.privatedns.org Wunderground page: https://www.wunderground.com/personal-weather-station/dashboard?ID=ITAMPERE125
  11. Quick googling reveals this post: https://larrylisky.com/2016/11/24/enabling-raspberry-pi-camera-v2-under-ubuntu-mate/ Does it help?
  12. I renamed the github repository to: https://github.com/kecsap/robot_telescope/tree/master/weather_sensor_dht22
  13. Cool that the divider worked for you. I tried to assembly the cable to a HC-06 bluetooth modul, I have only 10k resistors at home right now, but it did not work with a 10k+10k to halve the voltage from the Virtuoso to 5.5V. The divider worked on the Beagleboard, but the HC-06 did not power up. I order a regulator to make the connection. I also built a normal cable (RJ11 to USB) which works fine. After looking in the software options, I think to write an INDI driver for the Virtuoso because the ASCOM driver is Windows-only and I want to control my scope from my Raspberry Pi.
  14. I tried quite many things today and played with the options. It seems that I can do nothing about this long processing time. Nothing changes the delay, I turned off the white balance settings etc. When I choose a different mode with -md parameter, raspistill returns quicker, the image has far-far less content, unusable. But anyway, it is not a huge problem.
  15. Ok, right now I am quite unsure what happens. I use a NoIR version of the "Camera Module v1" for Raspberry Pi. Specs: https://www.raspberrypi.org/documentation/hardware/camera/README.md According to the documentation I use only 4.5 sec shutter time with the command (and it can do max. 6 sec): raspistill -ISO 800 -n -w 640 -h 384 -ss 4500000 -o test.png ...but this command returns only after 34 seconds. If it uses only 4.5 seconds shutter time, I wonder why it would take 30 seconds to return a simple png file, the Raspberry is in idle. But most likely it is the reality, I mixed the command execution time with the real shutter time. Unfortunately the raspistill is closed-source, I cannot check what it does internally. I also don't have any conventional camera where I could check what I should expect for a 4 seconds-long shutter time and a 30 seconds-long. I am a beginner. I bought an Canon EOS 1000D, but it has not arrived yet.
  16. It took some time this update because my Raspberry Pi was lost during transportation and I had to order a new one. And also laziness. But finally I had a not-so-cold night with clear sky thus I put some hours to assembly the all-sky camera hardware along with a DHT22 weather sensor. I know that the result is not very nice looking. I put some O-rings on the camera and melted the plastic around with my soldering iron to be "waterproof". The clear camera dome also has not arrived yet. I installed WeeWX on the Raspberry Pi and wrote a small extension to read the DHT22 values. I put the code on github: https://github.com/kecsap/allskycamera/tree/master/weather_sensor_dht22 ...and my "weather station" is registered at Wunderground, temperature and humidity data are pushed "live" to that service: https://www.wunderground.com/personal-weather-station/dashboard?ID=ITAMPERE125 I consider to get a pressure sensor to add barometer values. I did test shots with the camera on two more-or-less clear nights, but I need to implement the first version of the all-sky camera software. The weather part was the easiest to do first.
  17. So I started my journey to create a cheap system on my urban balcony. The final target to have an all-sky camera and remotely controlled easy to setup system to try astrophotometry. I created this topic to document the process for the all-sky camera if somebody else wants to create similar thing in the future. At first, I bought a camera for Raspberry Pi without infrared filter (NoIR camera) for ~23 euro to check if it works enough well for all-sky camera. Without proper weather proof box yet, I put out the Pi to take 40 seconds long shots for a half night and here is the result: I was lucky, there were everything that night: clear sky, clouds and Moon. The youtube compression ruins the details, but I think it is obvious that it seems good enough for the purpose. Here it is a quick trial to detect the clear sky with basic image processing. A mask image was created to eliminate the trees from the frames and the following steps were applied for each frame: 1. Gamma correction: 0.3 2. Threshold the pixels at 140. 3. Declare the sky not clear when more than 5% of the pixels are white. The image label says NO!, if non-clear sky is detected. Now I wait until the next components are delivered to continue the experiment.
  18. @happy-kat: Do you know if the Brazilians still make the Bluetooth module? Their website is down. Do you have the email address contact to those people? Can you share with me in private message? Do you put 4 kg payload to the mount? I read that it can handle only 2 kg.
  19. Hi guys! Thank you for all the suggestions. I was reading more in this whole topic, because it was told on one hand that an EQ mount would be nice to have, the manual observation with binoculars work also on the other side. If both ways are okay, an AZ mount also should work in between. Looking more on ebay, I could see that I can get a telescope with motorized EQ2 mount for the same price like that Heritage with Virtuoso mount. In the end, I have chosen the latter because the EQ2 mount is just too big and not so portable. Anyway, the major part will be to start the system building, programming and I can upgrade the mount later if it is worth. I have not told, but I will make the following system: - An all-sky camera from a Raspberry Pi with NoIp camera+humidity sensor. I have seen a video on youtube that this camera works well for all-sky purpose with city sky. - Wedged Virtuoso AZ mount to "simulate" an EQ, controlling via Bluetooth connection. On Windows side, there is ASCOM driver, I can drive the mount remotely. - I am not sure if the mount can carry the Heritage+DSLR together, but the DSLR can be attached alone on the Virtuoso as a second option. I will put this small system to my balcony and controlling from my flat. Csaba
  20. Hi, I use Skywatcher Heritage 130P for stargazing for a year, but I am still a newbie. Now I would like to build a cheap, small setup to contribute something "scientific", e.g variable star observations. Maybe it is not possible with my conditions therefore I need some advise. Are a Skywatcher Heritage 114P (with Virtuoso) or Skywatcher Explorer-130P (with Supatrak) good enough to take shoots on a city sky to measure variable stars (and upload the results) or some other things which has some scientific value? I don't want to go for astrophotography with this setup at home, I use iTelescope network for that purpose. Thanks, Csaba
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