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About GUS

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    My boy, knowledge, chess, mountains, astronomy, microscopy, angels, humanity
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    Santiago, Chile

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  1. Anybody used it on jupiter? It says on gerdneumann.net for the UHC-E: Other uses: Observation of Jupiter's clouds. I wonder if the UHC would also enhance jupiter's clouds, and which of the two would be better for this. Come to think of it, has anybody used either on other planets, lunar, solar? Thanks Gus
  2. Big Phil, Could you attach those two pics, for comparison's sake and to get a better picture (haha) of what you mean? Cheers
  3. Thanks guys, Ronin, it's amazing that you say the eye only sees up to 60° without looking from the side, and to think there's even a 120° ep out there!: https://telescopes.net/store/eyepieces/category/eyepieces-by-field-of-view/100-120-fov/explore-scientific-9mm-120-argon-purged-waterproof-eyepiece-2.html Is all that extra real estate lost because the 'horizon' for the human eye ends at 70 or 80° and even for that you have to tilt your head? Good to read a description of what the immersive effect specifically entails, namely no borders, not even in the far away outer edges. Moonshane, I don't have a binoviewer yet but plan on buying the Orion, especially since I've read positive reviews and the fact that it comes with a 2x barlow. On that point, would it make a world of difference if that barlow were a 2x powermate instead of the one included with the bino, all else being equal? Any insight on this anyone? Answering your question I want to look at the moon and planets but mainly at the sun, in white light and Ha, although a sunspot at high mag will be moving out of view much faster than a whole disc view, and if you're using a manual alt azimuth mount, you're going to have to turn those knobs like there's no tomorrow I assume. If you're doing Ha it doesn't matter so much since you'd still be looking at something - fire! But if you're doing white light and all you have is a sunspot to look at in a sea of featureless white, then it'd be more pressing to not lose sight of that sacred sunspot. Why do you prefer up to about 70° degrees afov for mono viewing? ¿For the same reason Ronin says, that the eye can't see much more beyond 70- tish°? It's great that binoviewing and high power go well together, and although more challenging, low power can also be achieved (thanks Stu). I get a nice full disc view occupying the bulk of the fov with my Celestron 8-24 zoom ep at 24mm and 40° afov (in mono). Anything below that and the Ha disc quickly degrades into the universe of dimness and blurryness, mostly the latter. So I guess I could binoview on the cheap with a pair of these for full disc and cough up a few more zeros for some top of the line optics for high power viewing. So Louis D, thanks for the advice but 'simple' ep's don't cut it for high power. Funny to think that for Ha just about any singlet objective lens that isn't plastic is as good as a doublet (or triplet even?) APO, but when that same extreme narrowband monocolor light stream hits the ep, then it suddenly really matters what ep it's traversing. Well, that goes to show that the laws of magnification also apply to monocolor. Has anybody seen CA when looking at white light, or is it, like in Ha, also absent? Or mostly absent, even though it has all the colors (which might not all come to focus at the same sharp point)? I've only looked at white light through my sv60eds which is an APO, so there's none there, but my ep isn't (though it's fully multi-coated mind you), and none either with my 10x70 binoculars, which aren't anything to die for, so I wonder. Stu, there's hardly any secondary market here; I've never found used binoviewers advertised, mostly only whole telescope and tripod setups. Just about any accessory you need you have to import it. Add postage, customs duties, S&H, freight forwarder or import agency profit... and you end up paying about one and a half times the sticker price.
  4. Hi everyone, any thoughts on which is preferable? One wide FOV eyepiece or binoviewing with two eyepieces in the normal field of view range? Thanks, cheers!
  5. Didn't pay attention to the name, just assumed it was a guy, so I hereby make the correction: ...here are some words from the gal herself, the Queen, Jen Winters.
  6. Hey VlaiV, I bought it in September 2015 which is the north's fall, so maybe airplane temperatures played a role, good thinking, but I don't think so. I said it was brand new because I couldn't use it until only recently because the only scope I had was a 120mm and I didn't want to risk burning it on that before buying an ERF, which I never managed to afford. Then I bought a sv60eds and a baader uv-ir cut but didn't have a tripod to put it on, tragicomically, until I'd say two months ago when I bought the Celestron heavy duty alt- azimuth. So when I finally managed to try it out (once I tried just holding it but when I could manage to get the sun in view it would quickly fly off and then the painstaking process of chasing it around would start all over again - frustrating, besides I couldn't assess anything with an unstable view. Anyway, once I put it on the tripod I only had clear detail on prominences and faint detail on the last fifth I'd say of the outer rim, if that, the rest was basically just an orange to red blob; this and the prominences being sharp would hold regardless of the position of the dial, despite allowing for required heating up or tuning times. To be fair Daystar was cooperative and offered to pay for return shipping. I still have to pay for postage both ways though and hopefully not any customs duties on the return. They'd do better verifying each unit before shipping than being congenial later. Ps: The only eyepiece I've tried it on and the only one I have, for now, is the Celestron zoom 8-24mm. I've since sold the 120mm which was the Orion 120mm f5 which I used on the iOptron minitower 2, also gone. I had also sold a few stock eyepieces along with the setup before testing the Quark. Go figure, yesterday I ordered two Orion short tube 80's!! They've just been discontinued and replaced with a cheaper version that isn't fully multi-coated and come a tripod so I'm more than thrilled to have managed to get hold of two, just in case, and that way I can use one with the quark and at the same time the other with Baader Astrosolar film which I fashioned into cardboard to put over a pair of 10x70 Comet binoculars I have, and with the sv60eds. Speaking of which, has anyone experienced ca with white light observing? I don't have any, not with the binoculars and much less with the sv60eds. Tip: It just recently occurred to me to use my moon filter when looking at white light, before I would just put on sunglasses.
  7. I had to send mine back for inspection/repair and it was brand new. All the way from Chile; it's just arrived in the US. Damn Daystar, they couldn't bother to see if something works before selling it. Makes me mad. All the hard work coming up with the Quark going to waste for failing on a simple but crucial step of the process - end of the line quality inspection and field testing. Sloppiness. Well, they're paying the price for it, and so am I, literally.
  8. Wouldn't know, but here are some words from da maan himself, the king. See if you can get an inkling into the unveiling of the mystery: https://www.cloudynights.com/topic/534901-double-stacking-a-daystar-quark/
  9. Sorry!! The comparison is with a Daystar PE 0.5A, not a Quark!
  10. Thanks guys, btw, I had completely forgotten about this video I had seen some time ago of live stream unedited video. On a side note and spoiler alert: the pst mod wins hands down.
  11. I had completely forgotten about this video I had seen some time ago where the pst mod is sharper than the Quark, @ 230mm aperture:
  12. Thanks Merlin 66, I was asking since I use my Quark Chromosphere (anyone out there with the Prominence? Worth it?) on a sv60eds but plan on getting the Orion short tube 80 which is no APO. Maybe as much if not more attention should be placed on the ep that will likely have as much a say in the image that will finally hit you in the back of the eye. The lunts having a single lens definitely says something.
  13. Does anyone have any Ha pictures, especially with Quark or PST taken with a digiscope and cellphone or point and shoot? Just about all you can find are images that are built on thousands upon thousands of stills taken with a dedicated camera sans the ep then processed in Registax or equivalent software to get the cream of the crop. I would like to see exactly what one sees through the ep with variety of apertures and magnifications. Thanks guys (and ...gals maybe?)
  14. Hi, Has anyone noticed any spherical aberration or off axis aberrations (field curvature, astigmatism & coma) in an achromat in h-alpha? Or a better overall image quality in any way (clarity, resolution, sharpness, contrast, brightness etc) using an APO or ED over an achromat? Thanks
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