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The "No EQ" DSO Challenge!


JGM1971
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On 17/04/2016 at 23:14, Nigel G said:

A good night last night after sorting out dew problem,  started taking lights at 2am after street lights go out, what a difference. 

M27 Dumbbell nebula.  48x20s @ 1600 iso,  40 dark, 50 bias. 150p canon 1200d. DSS & StarTools. 

Nige.

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wow what scope/ mount did you use on this shot ?

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I have a Skywatcher 250 FlexTube GOTO and have used it to good effect imaging.  You have to keep your exposures low ( less than 20 seconds) due to the Alt/Az mount not handling rotation.  You will also have to crop out rotation in long sessions.  But overall, you can get some REALLY good shots, especially of distant and dim objects. 

Tracking isn't the best with that rig, and I haven't found guiding software that is much use, but it is still manageable.  I tend to plate solve the image, let the SynScan app muddle along with its tracking and re-center via plate solving as necessary.  

....and believe me, I have tried every piece of software for every operating system available to try to get consistent, reliable guided tracking, without reliable success for that setup.

 

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  • 2 weeks later...

Captured December 2021 and stacked many times and flats plus dark flats are the current blend with lights for best results. I am still trying different combinations and will likely process the data many times as it is as Pleiades is too far South now for getting more data. Way many flats and dark flats but was experimenting. DSS + Startools. Image is not clipped but I was fairly aggressive with removing background gradients, local street lights bortle 5.

50ED Evoguide | EVEFF-V2 | Canon 1100d | ISO 1600 | Virtuoso V1 | 117 lights | 121 flats | 115 dark flats | 26 minutes 13 seconds | predominantly 15 seconds

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  • 2 weeks later...

Last night the sky was quite murky  but I managed to try out using the evoguide with the ASI462 and sharpcap. I didn't quite finish learning/applying the Brain function to use what that considers the optimum setting for the camera. The sky was too murky to have any success using the Y mask so will try it again when the stars are clear and much brighter so focused manually. 

I set sharpcap to livestack but also save the individual files which I then stacked in DSS, 5 seconds x35 frames with no calibration files using the virtuoso v1 and evoguide with FFv2. Tonight I would have tried again but the sky is so bright I cannot see any stars anywhere and there's no Moon. I used rubber bands to fix a red dot finder to the ASI462 and was able to complete alignment using that in conjunction with the Sharpcap display. The main purpose was to have a go using this camera for DSO galaxy captures as an alternative to the DSLR, nothing lost in having a go with what I have, binned the image 50% in processing in StarTools.

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