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Posts posted by Laurin Dave
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Wow Gav, that is absolutely brilliant... well done! ...more like a Cosmic Masterpiece!
Dave
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Looks good and looking forward to seeing more of your French adventure.
Dave
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Maybe try swapping out the usb cables.. bad cables have been known to cause this issue.
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Hi Tom.. try going into PHD connect tab click on camera and it’ll show a list of cameras, does it just show ZWO ASI Camera? If so then maybe you need to have the AScom drivers installed for ZWO so that you have a choice of two.. that’s what I have and it works for me. Same in SGPro
Dave
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Hi Steve... did you figure out what was causing the embossing?
Dave
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That’s great news Tom..
Dave
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2 minutes ago, giorgio_ne said:
I’m interested to know if it is possible to use 1.25” filters with this camera.
It will be.. its only slightly larger (at 14mm by 10mm) than the 694/814/834 chips (12mm by 10mm) and smaller than the ASI1600 (17.7mm by13.4mm) which works with 1.25" so long as they're close enough
Dave
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Hi Steve... very strange, somethings moving, I'd work out how close to the sensor they are using CCD Ware dust donut calculator (my rough guess is 7mm which puts them on the sensor protective glass so maybe that's come loose)
Dave
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Are you using the ZWO filter wheel? If so vignetteing with either 1.25 or 31mm easily correctable with flats.. I've used both and saw very little difference.. 31mm just slightly better
Dave
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Fabulous image, how good is he going to be when he grows up !
Dave
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Turn the gain down .. it’s in the camera control tab
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11 minutes ago, AbsolutelyN said:
I'm curious on the spacing. I have just acquired very similar setup - esprit 100 + zwo 1600mm (pro version). I tested it last night and stars looked reasonably ok to me but I'm very new to this. Opinions if it's good/bad spacing much appreciated. I think I can see some elongation in corners. The setup is flattener, zwo 16.5mm spacer, zwo 21mm spacer, mini filter wheel, camera. Quick exposure attached.
After contacting Skywatcher they can apparently provide thicker felt for the rings. I have exact same issue - the tube just slides through the rings no matter how tight. The washers are in correct place. Not impressed with that at all as rings are basically not ft for purpose as supplied.
With ASI1600 to get 55mm backfocus its flattener then 11mm and 16.5mm spacers FW then camera ie take the 11mm spacer off the front of the camera and connect camera direct to FW. There are diagrams on their website showing how its done. At the moment you have 65mm.
Dave
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Canon lenses have 44mm backfocus and the distance from the front face of the camera to the sensor is 6.5mm so the camera adapter plus spacer should total 44-6.5mm i.e. 37.5mm to obtain focus. Have you measured it? Looks like the zwo diagram for the 183 is incorrect in that you do need to use the 11mm female to female spacer as it shows in the diagram for the 1600.
For what it worth I have the 1600mono and filter wheel and the appropriate version for Nikon lenses and it focuses fine.
Dave
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Surely Darkframe should have sorted that out as part of their Stellardrive mod. I'd get in contact with them and ask them to fix it.
Dave
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Thanks Steve for your excellent write up, I shall add it to my copy of your Dark Art or Magic Bullet book which arrived yesterday .. I did notice that in this post Deconvolution now starts on page 51 rather than 45 as in the book.. What other gems are you working on?
Dave
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Hi Nigel,
Nice image, I had a look at your data last night whilst waiting patiently for my power supply to fail as I imaged the Fireworks galaxy in Ha. To me Dynamic psf in Pixinsight seems to show that the minor elongation gets worse on the Red from top left to bottom right and on the Green and Blue in the opposite direction, also the Blue and Green are generally more elongated. Also when combining RGB and after background neutralisation there is a pronounced red to green gradient left to right... So these make me wonder whether you did a meridian flip between red and green/blue and whether you have balance and polar alignment/field rotation issues, I don't know whether you are using an OAG or guidescope or are on a on a permanent pier.
Hope this helps
Dave
Subs after Meridian Flip - Flats don't work properly
in Imaging - Discussion
Posted
Hi Steve... came across this recent thread on Cloudy Nights.. uneven illumination of the OPs flats panel causing a very similar embossed dust bunny to those you had...
Dave
https://www.cloudynights.com/topic/661557-flats-not-correcting/