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Everything posted by Laurin 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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Skywatcher AZ-EQ5GT DEC wobble/play
Laurin Dave replied to Coastliner's topic in Discussions - Mounts
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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From the album: Esprit 150ED
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From the album: Esprit 150ED
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M27_NBRGBComb_522_DBE_ACDNR_ps_crop.jpg
Laurin Dave commented on Laurin Dave's gallery image in Member's Album
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M27 Blue Gold_RGB Stars DBE.jpg
Laurin Dave commented on Laurin Dave's gallery image in Member's Album
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Fireworks_NBRGBCombination_mltbgnd_mlt15_crop_ps.jpg
Laurin Dave commented on Laurin Dave's gallery image in Member's Album
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Fireworks_LRGB2_mltbgnd_mlt15_crop_ps.jpg
Laurin Dave commented on Laurin Dave's gallery image in Member's Album
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Crescent_Ha_Oiii_RGB_Stars.jpg
Laurin Dave commented on Laurin Dave's gallery image in Member's Album
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From the album: Esprit 150ED
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From the album: Esprit 150ED
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Fireworks_NBRGBCombination_mltbgnd_mlt15_crop_ps.jpg
Laurin Dave posted a gallery image in Member's Album
From the album: Esprit 150ED
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From the album: Esprit 150ED
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From the album: Esprit 150ED
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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