Kitsunegari

Here is some vital information that was provided by televue.com. These formulas are essential to make this "a-focal relay" work the way I desire. There really is no "difference" between eyepiece and objective lens other than the greater focal lengths used. In the world of optics, a lens is a lens. As long as you know the focal length, and diameter you can achieve great magnifications by simply "mating" the focal points together. You can then calculate distances, to achieve an expected amount of mangnficaition/ or reduction.. http://televue.com/engine/TV3b_page.asp?return=Advice&id=85 (4) Focal Length Extended by Using Eyepiece Projection Camera lens must be removed. Focal length extended by eyepiece acting as a relay lens f/# slowed by projection magnification Magnification of focal length determined by Relay Ratio (see diagram left): Relay Ratio = A ÷ B focal length = Telescope Focal Length x (A ÷ B ) Where A and B are determined from the formula: Where F = eyepiece focal length Example with 600mm focal length (TV-85 telescope) using the Tele Vue Eyepiece Projection Adapter with Tele Vue 11mm Plössl eyepiece: if the Plössl is 12mm from Telescope focal plane and 150mm from Film or CCD Plane, the relay ratio is 150/12 = 12.5. 600mm x 12.5 yields 7500mm focal length. (5) Afocal Imaging (Also Called "Digiscoping") Camera lens remains attached. Focal length of camera lens extended by telescope magnification where: magnification of Telescope = objective Focal Length ÷ eyepiece focal length Example: 600mm focal length telescope (TV-85 telescope) with 10mm eyepiece = 600/10 = 60x. If camera uses 50mm lens, above equation yields 3000mm focal length. An alternative way of determining effective focal length considers the camera lens and eyepiece combination acting as a relay system. Using the example above, the 50mm camera lens with the 10mm eyepiece gives 5x relay magnification. 5x600mm telescope objective focal length yields 3000mm focal length.

and for the curious, some close ups of my pump mounts attached to the extensions, camera, mirrors and telescope. This first image shows the Camera , very close to my 127mm objective, with the 2" to 1.25" eyepiece adapter. (52mm to 48mm stepdown camera adapter is attached as well) Second photo here is a close up of the "pump mount" that uses a rubber gasket to retain the 52mm - 58mm extension tubes. It is mounted to my OTA with the top thread of the scope rings via "aluminum window screen framing" This aluminum framing is very cheap extremely light weight and rigid enough to build a great optical rail mount. only $5.00 for an 84" section from homedepot. https://www.homedepot.com/p/Screen-Tight-5-16-in-x-84-in-Aluminum-Screen-Frame-MSCF5167/100069982 Here is the second Coronado pst CaK corrected achromat that I cannibalized from a coronado pst . It is attached to the 52-58mm extension tubes via 52 to 46mm step down camera ring. The front of the dewshield already has 52mm threads so its very easy to integrate without custom made parts. A close up of the aluminum window screen frame, and another pump mount. There are three pump mounts total on this extension assembly, and they are very easy to just bolt on to any flat telescope. It is firmly set in place and does not shake, or sag. The pump mounts are made of aluminum so they are fairly light weight. Here you can see the first Pst CaK achromat, again attached to a 52mm to 46mm step down ring; i am using a self centering 2" eyepiece extension barrel here attached to the mirror. The thumbscrew has been removed from the second mirror so the focuser of the telescope can still operate. The polished chrome barrel on the base of the 2" eyepiece barrel does not snag on the mirror, so the telescope focuser still functions smoothly. There is just enough clearance to allow focusing through this adapter while it is attached to all the pump mounts. The pump mounts are all fixed and do not move, they hold both objectives securely to the top of the explore scientific telescope. I am using a second 2" nosepiece extension threaded onto one of the 52mm extension here (there is a 52mm to 48mm step down ring to allow a standard nosepiece mounting onto the 52mm extension). This allows the Coronado CaK objective lens to integrate with the self centering 2" eyepiece barrel directly into the mirror assembly. Somewhere in here there is also a "reverse thread" adapter . This is commonly called a "gender changer" in the camera world. All industrial standardized parts are used on this. All i had to do was drill holes in the aluminum window trim, so i could bolt it to my OTA..

mosaic pieces zipped up and shared here if anybody wants to show me how to smooth it out so its even. I used "imerge" 0014.zip

I happened to see the crazy big prominence today while doping around with some unconventional optical experiments.. it was very faint today, but was certainly still massive. I am attempting to build an a-focal calcium magnifier using many many many extension tubes. MY first test run actually worked well , and now I am in the process of calculating the required distance to get a high definition solar limb image out of my basler 1920-155um. I want something like 5000mm I built the extension support out of fuel pump mounts. (unconventional doping) https://www.ebay.com/itm/Alloy-60mm-Fuel-Pump-Filter-Mounting-Bracket-Clamp-Cradle-Holder-Silver-USA/174332539016 The extensions were imported from china a few years ago. I bought about 100 of them for $1.00 each , these have a 58mm thread on the front and with a 52mm thread on the back. They fit perfectly inside the fuel pump mount.! https://www.ebay.com/itm/52mm-Metal-Screw-in-Hood-Shade-for-Standard-Lens-with-58mm-Lense-Cap/264635047847 I utilized TWO coronado pst cak objectives, for the a-focal relay optics. The rear of the pst objective has a standard 46mm camera thread, and the front has a standard 52mm camera thread. Perfect for integrating into optical systems with off the shelf parts. I retro-reflected the solar image back toward the objective using TWO , 2" diagonal mirrors. At the objective, is where my camera is mounted, using a 48mm to 52mm stepping ring, attached to a standard 2" to 1.25" telescope eyepiece reducer Why am i doing this? Because my televue powermate 2.5x , and meade 2x barlow are producing newton rings and its very annoying. These PST objective lens optics have completely eliminated my newton rings! So that is worth it. Secondly , i believe if i experiment with filter placement i can squeeze out narrower bandwidth with the crazy long telecentric operation. Again, my final goal is to get something like 5000mm running into my basler 1920-155um camera so I can get a nice high resolution closeup of the spicule layer for everyone! While i am getting amazing results on the little imx 287 chip with its 720x480 resolution at 350 frames per-second. I really want something astoundingly detailed and large. Like this mosaic for instance! This mosaic came out of this first experimental run. (its pretty huge) I used a different filter here. I have not attempted many mosaics, but i am happy with this.

i just learned another user (rigel123) captured this same event in hydrogen alpha,

attached are the zipped raw files for anyone that wishes to process this time-lapse with their own style. calcium limb surge.zip

Gimp .gif animated timelapses are hundreds of megabytes with the amount of frames i am using. They are also display very bad image compression which degrades the image big time.. Currently i use https://gifmaker.org/ to develop my aligned images.

200 frames total. (this one gave me a bit of trouble aligning!)

i figured out that i can use PIPP to do the mass cropping with autosaving. I did not see an mass saving feature in Gimp and each one needed saving individually which took a very long time. Do you know a trick to do a batch process? That would help me out a ton! I am in love with CaK right now, nobody else is doing these 393nm timelapses so it makes these captures incredibly unique. The ES127 first light achromat has proven to be a winner at this wavelength. I am very satisfied with the basler aca720-520um despite its tiny resolution, it is invaluable with the fast capture speed for this. Today i captured at 350 frames per second, with no delay per video. Each video capture is about 4000 frames and I stacked 220 per frame.. FireCapture v2.5 Settings ------------------------------------ Camera= acA720-520um Filter=RGB Profile=Mars Diameter=12.68" Magnitude=-0.74 CM=171.8° (during mid of capture) FocalLength=32850mm Resolution=0.04" Filename=Mars_104517.ser Date=140720 Start=104512.233 Mid=104517.901 End=104523.569 Start(UT)=154512.233 Mid(UT)=154517.901 End(UT)=154523.569 Duration=11.336s Date_format=ddMMyy Time_format=HHmmss LT=UT -6h Frames captured=4000 File type=SER Binning=no ROI=728x544 ROI(Offset)=0x0 FPS (avg.)=352 Shutter=2.786ms Gain=23 (63%) Gamma=100 SoftwareGain=10 (off) AutoHisto=75 (off) BlackLevel=0 Histogramm(min)=1 Histogramm(max)=228 Histogramm=89% Noise(avg.deviation)=n/a Limit=4000 Frames Mars_104431.txt

this little active region put on quite a show and i captured till i ran out of drive space. 160 frames x 40ms delay. (220 frames in each stack) (8 seconds per video capture) (160 captures) Animated with https://gifmaker.org/ Cropped with avidub. Logo applied with avidub . Levels adjusted with avidub. Files converted with PIPP and registax 5.1 Three pass Processing done in ImPPG (.xml files attached) 127mm x 1200mm explore scientific first-light achromat with Meade 2x tele-negative barlow. Basler aca720-520um camera. Baader planetarium 36mm B-BCCD filter for energy rejection 1 angstrom calcium filter from Apollo Lasky @ http://calcium.solar https://explorescientificusa.com/products/fl-ar1271200maz01?_pos=8&_sid=9637d7ccc&_ss=r https://www.meade.com/meade-series-4000-126-2x-short-focus-barlow-lens-1-25.html https://www.baader-planetarium.com/en/baader-b-ccd-filter-(blue).html https://www.baslerweb.com/en/products/cameras/area-scan-cameras/ace/aca720-520um/ http://virtualdub.sourceforge.net/ https://greatattractor.github.io/imppg/ http://www.astronomie.be/registax/download.html https://sites.google.com/site/astropipp/downloads http://www.firecapture.de/ Thanks for watching! 1.xml 2.xml 3.xml

after what ive been seeing in my calcium filter, i doubt i will ever go back to h-alpha i just picked up a 3.5x siebert optics telecentric to get the most out of my setup, hopefully it works out. Great images btw, the convection cells are awesome and i see you grabbed the Calcium spicule layer. Very few are imaging that and you should be happy that it comes in for you, most lunt filters dont show it.

The spiked limb of solar calcium resembles that of a sea urchin! A modest 127mm aperture with a 2.5x televue powermate. A highspeed camera was used, at 250 frames per second. The basler 720-520um IMX287 sensor is a game changer for timelapse imaging the sun.

This turned out interesting. 127mm x 1200mm telescope + meade 2x telenegative + televue powermate 2.5x + basler 720-520um. It appears i have found the limit of my 127mm objective, and now need to upgrade to 150+mm scaled down for best result here. original raw attached. Mars_182732.tif

link to the zip compressed raw aligned frames with no processing. If you want to process this timelapse yourself, you have all my permission here https://drive.google.com/file/d/1GZkxMX9fCatc2pwCEpzhUrjed_Ussb-A/view?usp=sharing

300 frames per stack. 3 second capture time per video. Zero capture delay per video. 142 frames.

here are ultra high resolution surface video captured by the dutch open telescope https://webspace.science.uu.nl/~rutte101/dot/movies/2006-04-24-NW-ca.mpg https://webspace.science.uu.nl/~rutte101/dot/albums/movies/2006-04-24-NW-ca.avi here is an ultra high resolution limb video captured by dutch open telescope https://webspace.science.uu.nl/~rutte101/dot/movies/2003-11-04-AR10486-ca-limb.mpg

@GreatAttractori think i nailed it here with the right processing. There is a slight dotting, but i think i can eliminate this if try a bit more. single pass using 100.xml above double pass below using 100.xml first, then 100b.xml second. (slightly darker, slightly sharper) 100.xml 100b.xml

@GreatAttractor @Montana my imppg files are attached, one pass with anio above second pass below with anio2 (a little sharper but with more noise) anio.xml anio2.xml'

this stuff is really there and cannot be an artifact. Yes i can be greatly "Exaggerated" or "over cooked" but its there in the raw data. just look at this animation of the "Cooking" , its clear when it begins to be too much processing as the little streaks become over exposed. This brightening is some type of "intergranulation connection" between the celluar divides..

okay now i am very confused. Here is a different sample, this time i used PIPP to extract 500 of the best frames . I still cannot tell if they are artefacts from imppg or if this is real. This is only two passes and very light sharpening. Raw file is attached, this was stacked with registax this time around. Mars_134342_pipbp.tif

@Montana The above capture was about two minutes elapse time. The surface in calcium clearly re-develops extremly fast , faster than i imagined in fact; especially when compared to hydrogen alpha. , If you watch my longer timelapse below ; this represents 1 second intervals (5000 frame capture @ 500fps each video x 100 videos). I think zero delay is the optimum choice for this wavelength if you want to clearly capture something on the surface before it boils away. I am anxious to perform proper processing out of high resolution with a 4000mm recording , I may invest in a 4x powermate for this; or have a special barlow developed.

@GreatAttractor here are a couple raw stackistry stacks. i just tried random settings on the first one, set it to "90% best percentage" and the second one is default settings. Mars_134342_pipp.ser_stacked.tif Mars_134352_pipp.ser_stacked.tif

thank you for confirming my suspicion that it is not real. I have great experience resolving white light granulation, so no troubles there. I am just trying to figure out why Valery's and Dutch open telescope and several other users are getting the similar effect; are we all processing wrong? . see this thread here for more information https://solarchatforum.com/viewtopic.php?t=25168