I use pixinsight to process my images and it seems every star cluster ive imaged, the diffraction spikes get killed during processing but i would like to keep the diffraction spikes in my final image. The resulting diffraction spikes can be made thicker or thinner by adjusting the exposure. There is a plugin available for photoshop which does this, but its not available for macs. Anyone know of an easy way to make diffraction spikes on bright objects in photoshop.
Dec 02, 2016 i talked to the previous owner of my new setup who has been helping me get it working, he said that the 5th diffraction spike is an oddity of my specific telescope. As long as you leave the rings on the ota and dont spin the scope in the rings between nights, your diffraction spikes will always line up. Critical focusing with a bahtinov mask is a must and the stars are pinpoint with the 4 or 8point diffraction spikes seen on brighter stars. Contrary to pixinsight, we take no stance in what should or should not be allowed by including or excluding these tools in the software. Diffraction spikes show up on pointsources of light like stars because the light is coming from one location, not many. Crystallographic software available via the web software list from the wilson lab at uc santa cruz. Well be regularly adding charts and astro goodies, so signup to be the first to hear of new things from diffractionspike. I talked to the previous owner of my new setup who has been. To focus with my dslr, i simply find a bright star in the live view screen with the focus mask attached. If youre coming from postprocessing in pixinsight, then there are a. Overall, drizzle is an excellent stacking algorithm to use if your images in the stack are dithered and especially if you have a good data set to stack 10 or more images, for example. Pixinsight manual image calibration, registration and stacking. We get six diffraction spikes, but they are less bright than for four vanes. You can achieve the same result with camera lenses if you put fishing.
This slightly wider shot was taken with an smc takumar 5mm f2. Impression of the takahashi mewlon 210 for astroimaging. How to make legit diffraction spikes on stars with a refractor. Diffraction spikes rotation on altaz telescope pixinsight forum. Inspecting with histogramequalization, deconvolution rings, hdrmultiscaletransform, exponentialtransformation, stars reduction. Theyre called diffraction spikes, and the reason they happen is because newtonian telescopes have an xshaped thing inside of them called a spider vane that holds the secondary mirror in place. Contribute to hletrddiffractionspikecreator development by creating an account on github. No spike is seen with the curved spider, the light beeing spread all around the star.
You can if you want also create a range of different diffraction spike brushes so you can have long, fine spikes or shorter ones. Create a diffraction spike brush for photoshop iceinspace. A newtonians diffraction spikes add a much needed sparkle to a group of stars that really elevates them in my mind. I have a copy of the old pixinsight le software which, while undoubtedly. They are so common that many people think stars are supposed to look that way. It compares the diffraction pattern of your sample to a database containing reference patterns in order to identify the phases which are present.
Star spikes pro create and control every aspect of beautiful, realistic effects, based on mathematical simulation of light diffraction, resulting in attractive 3dlooking images. Oct 12, 2018 the diffraction spikes focus mask is a convenient feature youll find in all new william optics refractors. Thanks to the gdrp regulations and the eu, we have to tell you all this information in an annoying popup box. This action works great with fits liberator software from nasa eso. How can an astrophoto shot through a refractor have diffraction spikes on bright stars. They arent limited to 4strut geometry, and the suggestion that refractive systems dont have them is false depending on how general you want to get with spike, cameras that use an iris will show spikelike features in the diffraction. Pixinsight is an image processing software solution for the world of astrophotography created by pleiades astrophoto with the help of a team of worldclass astrophotographers. Star diffraction spikes tiny stars put diffraction spikes around most stars. Just adjust one or the other of each offending pair of supports so that their diffraction spikes overlap. Use pixinsight to enhance a galaxys brightness without affecting stars. If you have ieee floating point fits files, fits liberator v2, and adobe photoshop cs2 to cs6 or cc you can open the image in 32 bit per channel mode, ensuring no loss of data. Beginners to advanced amateurs and pros, polish up your astrophotos for a beautiful, naturallooking presentation. Diffraction spikes occur on all stars in an image, and so the profile will be identical within reason. Rex is a powder diffraction analysis software based on the rietveld method, providing a userfriendly environment to perform quantitative evaluation of powder data.
I would like to add diffraction spikes to one of my images. Our first is an overview of pleiades astrophotos pixinsight with guest expert warren keller of the popular astrophotography tutorial series ip4ap. Pixinsight le allows you to perform some basic image processing and is also an introductory. Normally, star diffraction spikes are the result of spider veins that hold the secondary mirror in place on a newtonian telescope, but i found that this could be recreated on my schmidtcassegrain. These small struts then deflect the light from the stars, and cause spikes to show up on the image. There is no valid softwarebased solution to this problem. Shown to the left in this exposure of the bright star antares, diffraction spikes are artifacts that show themselves on brighter stars in our images when the beams of light entering the objective end the business end of your lens run into an obstacle and are interfered with and bent, causing the light to. By doing so you typically introduce diffraction spikes based on the type and number of aperture blades in your lens. How to make legit diffraction spikes on stars with a. Looking for astronomy tools for adobe photoshop elements.
M 16 eagle nebula by alejandro tombolini introduction. Just like every website has done since the dawn of any advanced functions like using javascript, uses cookies so that we can provide you with the best user experience possible. The doubling of the 4 spider diffraction spikes is easier to remedy. Focusing by diffraction british astronomical association. I am beginning to do imaging and i dont know how to make diffraction spikes around stars as so many images show. The only requirement is that the sides of the rod or dowel are parallel. The attached screenshot is what i got with pixinsight using exactly the same set of files, with standard calibration and stacking workflow without any customized procedure.
I like pretty pictures it would be good to be able to add diffraction spikes to some of my images. Its an interesting process, because the cameras on hubble do. As i progressed into astrophotography, i discovered that a great deal of digital image processing can be needed to get the best out of ones astrophotos. Carbonis actions, a popular, easy to use set of tools for adobe photoshop full version designed for use by astrophotographers in all parts of image processing. Dec 09, 2019 just like every website has done since the dawn of any advanced functions like using javascript, uses cookies so that we can provide you with the best user experience possible. Gradient xterminator is a gradient removal plugin for the windows version of adobe photoshop that is fast and easy to use. This is particularly noticeable on the stars and on the star diffraction spikes the brightest edges in the image. I have a copy of the old pixinsight le software which, while undoubtedly an older version. How does raw data from the hubble space telescope end up to become a finished gorgeous color image, like the one of arp 274, above. Rex offers a flexible parameterbased architecture for the optimization of structural and microstructural related quantities, coupled with an intuitive and modern user interface. A very nice member on astrobin is sharing their raw data files to anyone to use to practice processing with. This article describes how to make your own diffraction spike brush for photoshop, so you can add artificial diffraction spikes to your images. Bright stars, especially with prominent diffraction spikes, in my opinion really. Aug 09, 20 im in the process of buying a skywatcher evostar 80ed dspro ota and though this may or may not freak some people out, i would really like to make something to add star diffraction spikes to my images taken through it.
M42 orion nebula revisit with nikon d500 min xie astrobin. Because the material is made from optical acrylic rather than metal, this mask provides 92% light transmission. Multiscalelineartransformation denoise, pixinsight. The total amount of light inside the diffraction spikes is equal to the ratio between the front surface of. Adobe photoshop cc 2016, astro pixel processor, sequence generator pro, prodigital software starspikes pro 4. When i examine the copy of the image which has been saved to the laptop i can see the bhatinov diffraction spikes on many of the stars, even much smaller ones than you could ever see on the camera lcd. The program allows for manipulation of simulated diffraction patterns in realtime and in an interactive manner by changing and visualizing crystal orientation and adjusting.
Diffraction spreads the light in the direction orthogonal to the vanes. This is how i use the astrophotography nebulosity 4 software to focus my zwo asi1600mmcool mono camera on a star. You can if you want also create a range of different diffraction spike brushes so you can have long, fine spikes or shorter ones its really up to you. Its an interesting process, because the cameras on. Even if shooting through a refractor, you can get diffraction spikes by taping some string or fishing line in a cross pattern across the aperture. Some people like to be able to remove dust donuts or fix ccd blooming issues. On the left are the three bright stars of orions belt. However, this has resulted in large diffraction spikes on the bright stars, for this particular shot id have preferred to use a stepdown ring as a front aperture mask, a cheap and simple way of producing circular stars. Even if part of the spikes are excluded for the target, they are also excluded in the comparison star. This is done easily using software such as nebulosity or sequence generator pro for.
Making refractors produce star diffraction spikes imaging. Do you know of a way to do it in pixinsight or in a freecheap software for mac. The total amount of light inside the diffraction spikes is equal to the ratio between the front surface of the spikes and the aperture surface. Archie services a public service listing of archie gateways in the world wide web hosted by emnet business solutions, nottingham, uk calidris software imaging and electron diffraction cerius2 molecular simulations. You can achieve the same result with camera lenses if you put fishing line in an x in front of your lens. Taken last night apr 21, 2020 as both of these first magnitude stars were setting into my lightpolluted, redorange zone skies. Deep sky astrophotography in city light pollution results. The internal lens iris was used to stop the lens down to f5. Compatible with adobe photoshop full versions on both pc and mac.
Hi guys, is there a way to remove diffraction spikes from an image. Used a fixed tripod and took a series of 3 second subs with a nikkor 50mm ais f1. Sep 02, 2016 normally, star diffraction spikes are the result of spider veins that hold the secondary mirror in place on a newtonian telescope, but i found that this could be recreated on my schmidtcassegrain. Contribute to hletrd diffractionspike creator development by creating an account on github. Some people like diffraction spikes on their stars, some people dont like stars at all. The diffraction spikes focus mask is a convenient feature youll find in all new william optics refractors. Raw files for processing practice general astro pixel. You managed to pull out a lot of detail with 90s subs nice job. Children drawing stars in art works even tend to draw diffraction spikes on their stars. These smaller bits have to be held up in the middle of the telescope tube somehow. Oct 15, 2018 a newtonians diffraction spikes add a much needed sparkle to a group of stars that really elevates them in my mind. Pixinsight has some fantastic tools and there are some nice wrappers around them, like the batchpreprocessing script, that make them easier to use and and more efficient. Nothing quite divides astrophotographers like diffraction spikes but in this particular shot i quite like them they highlight the naked eye visible stars which helps place the scene in context.
Pixinsight, apt, phd2, sharpcap, sgp, stellarium, registax. Star spikes are something that several astrophotography software packages give you an option to add in after the fact, and while they certainly look nice, to me. I never cheat either and use a plugin to add diffraction spikes after the fact. Separate stars from deepsky objects in your astrophotos using the pixinsight software. Diffraction spikes the long sharp lines radiating from bright stars in some astrophotographs are an artifact caused by the vanes suspending the secondary mirror in a newtonian reflector telescope. I process them in pixinsight on a mac, and do not own photoshop.
I think that occasionally they can add something to an image if applied correctly. They are artifacts caused by light diffracting around the support vanes of the secondary mirror in reflecting telescopes, or edges of noncircular camera apertures, and around eyelashes and eyelids in the. Pixinsight limited edition le is a freeware subset of pixinsight standard. Cspot is a computer program for simulation, indexing and analysis of three types of electron diffraction patters. Diffraction spikes are lines radiating from bright light sources, causing what is known as the starburst effect in photographs and in vision.
Im in the process of buying a skywatcher evostar 80ed dspro ota and though this may or may not freak some people out, i would really like to make something to add star diffraction spikes to my images taken through it. Publicated in monthly contest complete description of a r g b image main notes. Im fairly new to pixinsight and i apologize in advance if this has been asked before, but i certainly couldnt find any mention of it i did find one thread talking about adding them. The problem with simplifying is that you also loose access to.
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