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riklaunim

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Everything posted by riklaunim

  1. Neximage is for planetary and lunary images only, so go hunt Saturn and Mars (Jupiter before night also) with it. Also NexStar SE use alt-az mount so you can't use long exposures (planets, Moon are bright so exposure is short).
  2. You want Ir-pass or Ir-cut filter? Standard 1,25" filters that do that are sold by Baader. "IR/UV cut" and "IR-Pass" are available.
  3. They offer large format versions, as well a clip filter - which you put insite the DSLR. Look at their price list: Hutech Filters and Accessories
  4. Hutech makes such filters for DSLR (IDAS LPS).
  5. You can buy hand held spectroscope (3 prism usually) from shool aids stores very cheaply (or make something simillar with a diffraction grating) and check the street lights. I have high pressure sodium lamps all around me, and spectrum I got (spectroscope + telescope pointed on the lamp): Then you can get best ALP filter, and/or check how good those filters are
  6. SkyWatcher should pass like this: Baader Neodinium Both are ALP filters but that skywatcher is a bit rare - not all shops offer that filter. Baader filters are quite common, and their optical quality is very good (polished optical glass with good coatings using new/good technologies).
  7. GSO makes APO barlows from 2x to 5x, and they should be cheaper than common 2x barlows They are also branded by Orion (and probably others).
  8. Astrodon offers NIR Tricolor Filters (description). Does anyone has some experience with such IR imaging? Also Astronomik has two IR-pass filters: ProPlanet 742 nm, ProPlanet 807 nm for luminescence images of planets etc. in LRGB set (+Baader ir-pass here), and, quoting: Anyone did that?
  9. Baader Moon and SkyGlow may also be good, but it's not dedicated ALP filter. Using very cheap chinese filters isn't good too as they may not be made from optical, good quality glass. Quite good for visual and imaging is Hutech IDAS LPS filter (~140$ for 1,25" filter) as it blocks terrestial light (Hg/Na) and try not to change the color of observed objects.
  10. NexImage uses ICX098BQ ccd sensor, which you will find also in: Old webcams are cheaper, I-Tec iCam are sold by few astro shops, and there are tutorials, and 1,25" extensions for Philips webcams. And you can record AVI with software like lucam recorder, krccd etc.This CCD is for lunary and planetary astrophotography. For deep space you need bigger and better CCD - either big color or big/medium monochrome sensor, and 16 bit conversion (those webcams above have 8 bit). And they aren't cheap QHY5 and LPI have CMOS sensor, which isn't good for darker objects. It could be good or better than CCD on moon (you get high resolution big CMOS for the same price as small 1/4 CCD from webcams), but it will lack sensitivity on darker objects (even planets).
  11. Today I started to play with a 3 prism spectroscope (called Double Amici Prism, described here) bought in a local show with shool/education aids/materials cheap. The spectroscope is quite small, small in diameter. To mount it to a 1,25" focuser I glued a 1,25" nose from a old photo film box: Then pointed telescope to a nearby street lamp and got the spectrum quite nicely. I managed to get some pictures of it with my Olympus DSLR, like this: But DMK21 failed (blurry bright something) with imaging the spectrum (AFAIK it shoul be in specific range frome the last prism etc. but currently I can't mount the CCD in any way to the spectroscope). For real astro spectrum photography I'll probably will have to put it in some metal 1,25" extension, and mount some high-resolution CCD/CMOS to it for imaging
  12. Lunary, planetary and other with short exposures. On good aligned mount you can probably get max 1 min exposures (webcam, ccd cam, DSLR may take a bit more exposure time than a planetary ccc/webcam). For Deep Sky you would have to get a better mount (HEQ-5) and invest in some guiding (and the newton will require coma corrector). It isn't cheap
  13. I have that 150/750 SkyWatcher but if you want to take pictures with the eq3-2 mount you need extra at least 1-axis driver for it, and polar finder for eq3-2 would be nice too. And Nicon T2 adapter ring.
  14. The initial list is online on my Polish site. I'll put the English gui version shortly, but the camera name and the CCD sensor name are there.
  15. Does anyone know what CCD devices are in which webcams ? (except those listed in Alternative to SPC900NC) I'm making a list of webcams, industry cams etc. with CCD that could be used in astrophotography (in theory at least) and the ccd device data is rarely available (like in Linux drivers docs )
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