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astro: ic5070
first light, needs a collimation tweak.....
5x900 seconds Intes-Micro M73 (7" F3 custom astrograph) Celestron CI-700 Mount w/Gemini reduced 50% -- John N. Gretchen III http://www.tisd.net/~jng3 |
#2
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astro: ic5070
I re-stacked this and that helped the field rotation, also brightened it
up some.... John N. Gretchen III wrote: first light, needs a collimation tweak..... 5x900 seconds Intes-Micro M73 (7" F3 custom astrograph) Celestron CI-700 Mount w/Gemini reduced 50% ------------------------------------------------------------------------ -- John N. Gretchen III http://www.tisd.net/~jng3 |
#3
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astro: ic5070
You are a digital wizard!! I was looking at your comment in your first
post and was about to ask you if your comment about collimation was based in general on star shape in the lower left; that seems to be gone in version 2 with the re-stack. Nevertheless - great first light!! btw - glad Gustav missed you, we had it in radar here. Ike has been threatening us big time so I'm pulling the scope and mount off the pier over the next few days and moving them to a secure building till early October. I'm scheduled to be at sea later this month and I just don't see trying to push my luck. - take care - Rod John N. Gretchen III wrote: I re-stacked this and that helped the field rotation, also brightened it up some.... John N. Gretchen III wrote: first light, needs a collimation tweak..... 5x900 seconds Intes-Micro M73 (7" F3 custom astrograph) Celestron CI-700 Mount w/Gemini reduced 50% ------------------------------------------------------------------------ ------------------------------------------------------------------------ |
#4
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astro: ic5070
thanks Rod! looks like Hanna will miss you but Ike could get both of us.....
rod wrote: You are a digital wizard!! I was looking at your comment in your first post and was about to ask you if your comment about collimation was based in general on star shape in the lower left; that seems to be gone in version 2 with the re-stack. Nevertheless - great first light!! btw - glad Gustav missed you, we had it in radar here. Ike has been threatening us big time so I'm pulling the scope and mount off the pier over the next few days and moving them to a secure building till early October. I'm scheduled to be at sea later this month and I just don't see trying to push my luck. - take care - Rod John N. Gretchen III http://www.tisd.net/~jng3 |
#5
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astro: ic5070
It looks like that new telescope is working out very well for you John.
Joe "John N. Gretchen III" wrote in message m... I re-stacked this and that helped the field rotation, also brightened it up some.... John N. Gretchen III wrote: first light, needs a collimation tweak..... 5x900 seconds Intes-Micro M73 (7" F3 custom astrograph) Celestron CI-700 Mount w/Gemini reduced 50% ------------------------------------------------------------------------ -- John N. Gretchen III http://www.tisd.net/~jng3 ---------------------------------------------------------------------------- ---- |
#6
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astro: ic5070
Nice first light target.
I think I see Hanna and Ike in this shot, sure it's nebula? You sure are getting in a lot of imaging for ducking hurricanes. Weather here is lousy and we have no hurricane problem though Gustov is sending moisture up here that makes each night cloudy with tropic humidity. Got up this morning to find it sunny but the water was pouring off the observatory roof. Sun was melting a thick frost layer! Summer is over! A bit of work on polar alignment should eliminate that field rotation problem. I've got this one down to where I see none across the part of the sky I image in (about 45 degrees either side of the Meridian. I can stack without rotation anyplace in that arc. My problem is my image scale changes with temperature. As the night cools the scale gets slightly larger. Enough that the blue image, usually taken last, is slightly larger than the green which is slightly larger than the red with lum the smallest. This can cause some odd blue and green artifacts around stars. So far I've been trying to scale manually in PS but think I need to invest in Registar and do it the easy, more accurate way. Your second image is better on my screen as to visibility of the nebula, beside the better stars, but seems to have too high a background brightness. Rick John N. Gretchen III wrote: I re-stacked this and that helped the field rotation, also brightened it up some.... John N. Gretchen III wrote: first light, needs a collimation tweak..... 5x900 seconds Intes-Micro M73 (7" F3 custom astrograph) Celestron CI-700 Mount w/Gemini reduced 50% ------------------------------------------------------------------------ ------------------------------------------------------------------------ |
#7
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astro: ic5070
John, congratulations to the new scope, it seems to do very well.
As for the brightness of the image my favourite would be the middle between the two versions. Stefan "John N. Gretchen III" schrieb im Newsbeitrag m... I re-stacked this and that helped the field rotation, also brightened it up some.... John N. Gretchen III wrote: first light, needs a collimation tweak..... 5x900 seconds Intes-Micro M73 (7" F3 custom astrograph) Celestron CI-700 Mount w/Gemini reduced 50% ------------------------------------------------------------------------ -- John N. Gretchen III http://www.tisd.net/~jng3 |
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