elpajare
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home town/country: Girona-Spain
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Post by elpajare on Nov 5, 2019 7:55:29 GMT
RISINGCAM Monochrome Hi-sensitivity USB3.0 1.7mp 1.1" SONY imx432 TE cooling deepsky astronomical telescope camera cool astronomy camera
This chip could be interesting for shots in B / N with narrow band filter type H alpha, with this sensitivity so high we would be within the range of 30 seconds of Video Astronomy and we could have access to weak nebula type objects. At this price and according to my data it would be the most sensitive chip on the market at a reasonably low price, "only" 1094.40 €
Model No Sensor& Size(mm) Pixel(um) = 1.1 inch (14.4x9.9mm)
Model No Sensor& Size(mm) Pixel(um) =ATR3-1700KMA 1.7MP / IMX432(M,GS) 9.0x9.0 G Sensitivity Dark Signal= 8100mv with 1/30s -- 0.15mv with 1/30s FPS/Resolution =94fps/1600x1100
Binning= 1x1
FPS/Resolution Exposure= 0.15ms~3600s
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Post by jimthompson on Nov 12, 2019 18:41:53 GMT
Since August 2019 I have been using the version of this camera sold by Mallincam, called the SkyRaider DS432 TEC. It is thermoelectrically cooled. I have the monochrome version and like if very much. My exposure times with a 7nm Halpha filter are very short, on the order of 20 to 30 seconds. With an Optolong L-eNhance filter my exposures were 10s per sub. This sensor is indeed very sensitive! You can see some of my captures with this camera at the links below. flic.kr/s/aHsmHBL7wdflic.kr/s/aHsmH2UnUGflic.kr/s/aHsmGRGMLXCheers, Jim T.
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Post by davy on Nov 12, 2019 23:35:35 GMT
Since August 2019 I have been using the version of this camera sold by Mallincam, called the SkyRaider DS432 TEC. It is thermoelectrically cooled. I have the monochrome version and like if very much. My exposure times with a 7nm Halpha filter are very short, on the order of 20 to 30 seconds. With an Optolong L-eNhance filter my exposures were 10s per sub. This sensor is indeed very sensitive! You can see some of my captures with this camera at the links below. flic.kr/s/aHsmHBL7wdflic.kr/s/aHsmH2UnUGflic.kr/s/aHsmGRGMLXCheers, Jim T. Nice hearing from you again jim
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Deleted
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Post by Deleted on Nov 13, 2019 3:21:55 GMT
Since August 2019 I have been using the version of this camera sold by Mallincam, called the SkyRaider DS432 TEC. It is thermoelectrically cooled. I have the monochrome version and like if very much. My exposure times with a 7nm Halpha filter are very short, on the order of 20 to 30 seconds. With an Optolong L-eNhance filter my exposures were 10s per sub. This sensor is indeed very sensitive! You can see some of my captures with this camera at the links below. flic.kr/s/aHsmHBL7wdflic.kr/s/aHsmH2UnUGflic.kr/s/aHsmGRGMLXCheers, Jim T. Hello Jim Does the DS432 need to be cooled and does Sharpcap recognize the camera ? Also, what filter would you use for dim galaxies at home ? And, how does it compare to the DS287 for sensitivity? cheers Paul
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elpajare
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Posts: 438
home town/country: Girona-Spain
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Post by elpajare on Nov 13, 2019 10:46:21 GMT
Hi Jim, I'm glad to read your opinions always well appreciated here.
From my purely practical point of view because my technical knowledge is scarce, this chip may be the best option for those who like the narrow band of H alpha and practice video astronomy.
10-second exposures for weak objects like most bright nebulae are perfect.
I understand that the photographs you post on the links have been taken with the IMX432 Mono + H alpha filter and the color ones taken with IMX294 color + Optolong L-eNance ??
Thank you for sharing your tests.
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Post by jimthompson on Nov 13, 2019 14:25:48 GMT
Hi Jim, I'm glad to read your opinions always well appreciated here. From my purely practical point of view because my technical knowledge is scarce, this chip may be the best option for those who like the narrow band of H alpha and practice video astronomy. 10-second exposures for weak objects like most bright nebulae are perfect. I understand that the photographs you post on the links have been taken with the IMX432 Mono + H alpha filter and the color ones taken with IMX294 color + Optolong L-eNance ?? Thank you for sharing your tests. I agree with the practical nature of this camera. I don't want to bother with expensive mounts or guiding, so the short exposure times offered by this sensor fit perfectly with my preferred mode of observing.
You are correct that the monochrome deepsky images in the Flickr links I posted are from the DS432M, but only those from the night of October 10th use an Halpha filter. The other evenings were with a tri-band filter; the Optolong L-eNhance. All the colour images are from my ASI294MC Pro.
Cheers,
Jim T.
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Post by jimthompson on Nov 13, 2019 14:35:58 GMT
Hello Jim Does the DS432 need to be cooled and does Sharpcap recognize the camera ? Also, what filter would you use for dim galaxies at home ? And, how does it compare to the DS287 for sensitivity? cheers Paul Hi Paul,
To be honest I have not tried the DS432 without cooling on. I have only had a handful of times to use it since I got it back in August. It really does shine though with the cooling on. This sensor, because of its sensitivity, also has a fair amount of amp glow. This is dealt with very well by the dark field correction feature in the MallincamSky software. I have not tried the camera yet with Sharpcap, again just a matter of getting enough clear nights here! My guess though is that the camera should work in Sharpcap using either the Directshow driver or the ASCOM driver.
When I am observing galaxies from my urban backyard I normally use something that provides good response to infrared, such as the Astronomik UHC or older Meade O-III. The Optolong brand UHC is also a good performer and more affordable than the Astronomik brand. With this new camera, the DS432, I think I will start to explore the use of IR hi-pass filters. Years ago I did a lot of experiments using IR pass filters with my classic Xtreme camera, and found that IR pass filters provide the biggest improvement in contrast on galaxies when in light polluted environments. The down side is you require much more exposure time when you use them, which is why I am thinking the DS432 will be a good pairing with these filters.
I also have a DS287, and I feel that the DS432 is significantly more sensitive.
Cheers,
Jim T.
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Post by Deleted on Nov 14, 2019 23:20:01 GMT
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Post by Dragon Man on Nov 15, 2019 10:13:56 GMT
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Post by jimthompson on Nov 15, 2019 14:54:41 GMT
Hi Paul,
I'm not sure what Adun is implying from his post, maybe the limits on what can be achieved using a focal reducer on a large sensor? I've summarized a few sensor dimensions below:
diagonal aspect ratio
IMX432 17.6mm ~3:2 (1.46)
IMX183 15.86mm 3:2 (1.50) IMX294 21.63mm ~3:2 (1.47) Panasonic 16MP 21.9mm ~4:3 (1.32)
I think many people are familiar now with what it is like to work with the IMX294 or the Panasonic 16MP sensor. Using conventional focal reducers we are limited probably to reductions on the order of 0.7x with these two sensors without getting noticeable coma and vignetting. The IMX432 is smaller than these two sensors though, so we can perhaps go to 0.6x or maybe 0.5x and still have a reasonable looking image corner to corner. I have not performed any specific testing with my DS432 looking at focal reduction, but I have used it certainly at 0.7x without any issues.
Cheers,
Jim T.
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Post by Deleted on Nov 16, 2019 1:53:18 GMT
Thanks Jim. I was getting confused between aggressive focal reducers and fast scopes. In that case,the IMX432 should be about the right size sensor for the Starizona Night Owl and should be ok with a RASA 8. cheers Paul
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