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Post by Deleted on Mar 30, 2019 23:28:18 GMT
That is good to know ,Ken. So you still use the UV/IR on the ED. If I want to observe galaxies with a cmos on my c6 for instance,then I should use the IR cut.Is that how you see it?
I find I get a fair bit of star bloat particularly with the 224 and 290 with fast scopes while trying to capture galaxies. It would be good to get a solution.
As far as the weather is concerned. There is a lot of wind and cloud but only spitting rain. I wish it would just get on with it and give the farmers some relief cheers Paul
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Post by Dragon Man on Mar 31, 2019 5:18:14 GMT
Paul, for viewing or imaging Galaxies, having no filters at all is best, but that causes bloated stars. Out of the 2 filters, IR cut and UV/IR cut, use only the IR cut filter. It does reduce some wanted IR light from Galaxies but it is far better than the UV/IR filter that cuts almost all the UV and IR. Galaxies emit a lot of UV and we want it on our camera sensors.
Many times I will remove all filters from my ED80 so Galaxies look far better, but when I get fed up seeing bloated stars I put an IR cut filter on it. For all other objects I leave the UV/IR filter on it.
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Post by vondragonnoggin on Apr 20, 2019 4:42:05 GMT
Going to change out the focuser on my Skywatcher Startravel 150 tomorrow. I had that linear bearing dual speed focuser sitting in the drawer and ordered the low profile adapter for it. I gain another 50mm back focus using the low profile adapter and linear bearing. Drawtube retracted is flush with end of the focuser on the inside. I think if I’m doing afocal use with my Night Vision and 56mm Meade plossl, I’m going to have to use extension tubes or the reducer will actually work before the diagonal and give me true .5x reduction. Won’t be able to test until possibly Sunday evening. This Startravel 150 is very lightweight for a 6” refractor! I’m really happy with the optics too. Just doing narrowband or longpass filtering over 640nm. CA is no issue with filtering I’m using. 12 lbs difference to my AT152 F/5.9 refractor and it is a huge difference in mounting it and bringing back in after observing. 3 major back injuries in the past have me really appreciating a lightweight 6” refractor. I think it’s going to be a new favorite for me. My mount weighs a lot, but I’ve figured out a way to carry it now resting on my shoulder and use the handle it has on one of the tripod legs to comfortably carry it the short distance down 4 stairs to my back deck where I observe. Tripod is 17 lbs (T-Pod 130) and mount head is 22 lbs (T-Rex with slo mo handles and DSC), but capacity for tripod is 136 lbs and capacity for the mount head is 35 lbs. It’s an alt az manual mount so working the slo mo handles for tracking is a bit like working an Etch-A-Sketch trying to get a curved line. It’s rock solid while viewing with my biggest two 6” scopes now. My iOptron mak 150 OTA is 13.4 lbs and the Startravel 150 is around the same. I know people always say for AP or video astronomy, the mount is very important and overmounting is preferred, but applying that to my Night Vision eyepiece visual use also is good. Nothing like having damping times of 1 or 2 seconds even if it gets a good bump. I mount my other scopes the same way also. 120ST is less than 10 lbs, but I have it on a 20 lb capacity head and 40 lb capacity tripod. Even my AT72ED goes on a 17 lb capacity head and 40 lb capacity tripod.
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Post by Dragon Man on Apr 20, 2019 11:56:47 GMT
Von, good to hear you got yourself the Skywatcher 150mm f/5 Achro. They are great! I won't part with mine. I use it all the time in conjunction with my ED80. I have been using mine for many years and it gives great views. It is perfect for Video Astronomy. Here's my permanent setup. The 150mm f/5 is on the bottom. The Focuser is an Astro-Physics 2.7" LINK HERE with matching Astro-Physics 2.7" 0.75x Telecompressor LINK HERE.
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