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Aenima

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Posts posted by Aenima


  1. Yeah, i have read quite a number of reports online of persistent halo's with the baader AND astronomik after the apparent time period where they recalled products and resolved the problem.

    Anyhow, i bought the baader 2" OIII 8.5  and it seems to be almost halo-free - i've noticed one or two larger brighter stars with mild halo (see image).

    m27 bi colour

    the bright star near the center top shows what might be a halo - (its only in the OIII subs)

    On 6/5/2016 at 18:24, ChrisLX200 said:

    You're intending using this with a DSLR? OIII signals are notoriously weak - weaker than Ha anyway, is there precidence for using one with a DSLR?

    ChrisH

     I do have an old CCD - a meade DSI with the grid passive cooling on the back. But also i have been using my filter-removed 350D with some success doing narrowband imaging, mostly Ha and OIII as i've yet to get a SII filter. eXi63B 

    Here are some examples from the 350D and astronomik 12nm ha clip and skywatcher visual OIII filters (ED80 scope)

    20624030922_fb7986ecc9_o.jpg21312217966_b7fcc56450_o.png

    Rosette nebula Bi-colour

     

     

    NGC2244 & Rosette

     

     

     They aren't CCD quality but I personally like them enough to think it IS worth trying with a DSLR ;) 

     

    Thank you for the replies to the original post. :)

    • Like 1

  2. 12 minutes ago, swag72 said:

    As far as I know, the issues are with the the older Baaders. I'd be buying from a reputable detailer such as FLO, who offer excellent customer service, and then test it at the earliest opportunity. If there's an issue, FLO are sure to help.

    Yeah, i'm definitely liking the baader OIII - they look good on paper, and plenty of decent images around. 

     

    Thanks for your feedback, :)


  3. Hi there,

     

    I'm hoping to buy an OIII filter for astro-imaging and i've read a lot of halo related posts and am unsure which to go for.

     

    Are the Baader OIII now halo-free? it sounds like OIII are notorious in general for halos and i want to be reasonably sure before i hand any money over.  

     

    My astronomik ha 1.25" shows bad haloes, but the clip version doesn't although that one is newer. Will the astronomik OIII clip be halo-free?

     

    I am unable to reach the budget necessary for Astrodon, so i'm thinking the next best will be either Baader or Astronomik, is this pretty accurate or am i missing a manufacturer?

     

    Many thanks for any assistance in advance!   


  4. Was looking for info on a decent OIII filter for imaging and found this thread - the title says oiii for imaging, but seems mostly related to DSLR so i thought i'd post my own results using a DSLR for narrowband. As a rough idea to anyone thinking of doing it. :)

     

    Here is a Ha + OIII bi-colour image of the VEIL NEBULA

    veil-nebula-bi-colour

    taken with an ED80 and a modded 350D (filter removed, not mono though) using astronomik 12nm h-alpha clip, and a cheap skywatcher visual OIII 2" filter. 

     

    and a h-alpha only mosaic of the north america nebula - 2 panes, with just the red channel extracted, using ED80/350D astronomik ha clip. NGC1499 pngm.png

     

    and a mix of OSC RGB data from the 350D and a h-alpha stacked and layered as luminosity in photoshop to add contrast and improve detail. Rosette and Bubble nebula.  

     

    rosette hargb 1

     

    Bubble nebula-dslr-crop

     

    • Like 1

  5.  Got these crater shots a few weeks before that, quite pleased with the detail despite the soft appearance from mediocre seeing conditions.

     

    If i recall rightly it was using a 5xpowermate as well which pushed the scope past its useful limit. I could be wrong and it was just my 3 x barlow. So dont quote me on it - i did however manage to get a useable image that way at one point, so its always worth trying if the conditions allow. :)

     

    nuloooner_Capture-30_09_2015-00_25_53_g4_b3_ap10-dd.jpg

     

     

     3rd crater.tif

    • Like 1

  6. Found an old (apparently USA model) celestron C8 SCT a while back,  its a bit hit n miss with collimation and the optics - (some very strange star test shapes :P) but when it works it works well :)

    Here is a couple images from a couple months back.

     

    Thanks for looking. 

     

    This particular night seeing was reasonably good, and collimation wasn't too bad either. angled w astra.pngjupiter sct layer 2.png  Celestron C8 / ASI120MC / 2X barlow - captured in sharpcap2, stacked in autostakkert!2, wavelets in registax6 :)

    • Like 10

  7. Definitely yeah, the seeing and other issues all get magnified as well. You'll find that has a great deal of influence over how well you can view planets or image them - along with collimation and quality of optics, the astronomical seeing is what determines the amount of detail in an image of a planet, and i think of the view in the eyepiece as well.

     

    Sometimes when the seeing is bad, you might end up getting a better view with less magnification for the same reason, and with smaller scopes - aperture in particular - too much power will have a negative effect if you push past the max. useful magnification.   


  8. 2 hours ago, hornedreaper33 said:

    Just a quick one. Would a Barlow or Powermate be used when imaging a small target such as a planet and is this purely to increase the size of the target on the sensor?

     

    Thanks,

    Chris.

    Yes, a barlow will increase the focal length of your scope - visually or photographically - effectively raising magnification and making the object look bigger, or appear bigger onscreen (if using a camera).

     


  9. Wow!

    Those are very good pictures from the entry level CCD.

    Very impressed especially with the whirlpool Galaxy - I think using the monochrome camera will help a lot as it was the software debayer process as well as the weird colour tones that made the G3 difficult to get good results from :/ with the mono + filters you avoid debayering and have control over colour balance in the final image.

    But well done getting those images posted above, really good to see nice results from the G3.

    Hope more are to come :)

    • Like 1

  10. I think you are right Lucky, the Nikon will really wipe the floor with the G3 and perform better for planets/lunar imaging and be worth trying on deep sky objects also even unmodified.

    The main advantage the G3 has is the lack of IR block filter in front of the sensor and 'possibly' noise levels when cooling is on - this last one might be untrue actually because the horizontal lines are way worse than speckles of read-noise and i see them in mine as well so its unlikely to be caused by a filter or other accessory in the light path. :(

    unfortunately it seems Orion are abandoning this camera as they can't even bring themselves to update the dodgy software let alone tweak the defects out of the camera design :(

    Try the nikon for deep sky, or with a barlow in video mode for lunar and planets - you'll be pleasantly surprised by how versatile and easy it is compared to the current camera :) 


  11. post-18772-0-49838100-1431890396_thumb.j

    i have had limited - (ie 'some') success with the colour G3 using deepskystacker 

    that may be the 4 the above poster was referring to - the bayer matrix pattern in DSS is CYMG 04 for the orion?

    But yeah, i captured in nebulosity and stacked in DSS under cymg 04 in the dropdown camera bayer menu.

    Need very long exposures to 'detect' enough stars in DSS as it comes out darker than i'm accustomed to with my dslr  

    I would  be interested as an Orion g3 owner to see how the thread develops, if or when it does :p   :)

    Thank you to the OP for the info and any other ppl who add to it :)

    image - quick test on m42 - 30 x 2min exp's ,  ED80/ reducer x0.5 / G3  (i think the CA and Egg stars are the cheap 0.5x reducer 1.25" )

    • Like 2

  12. Many thanks for the kind comments and likes :) i was pleased and a little surprised with the image from a 5x but thats mostly due to it not being successful in the past, its always worth trying though when seeing seems good :)

    There is likely more to be processed from the AVI'S i captured but the first few results are encouraging :)

    thank you for the comment/likes

    regards


  13. The maths are not difficult. The C8 is an F/10.

    With a 5x powermate it becomes an F/50. And with a 3x barlow it becomes an F/30.

    No its pretty simple i just have trouble doing it :) lol

    I still not sure whether the optimal pixel/focal length is the 'maximum' or  just the best match results wise..?

    Something like that. i'm figuring out if the actual scope is performing properly (and collimated), regarding C8's in general.


  14. My camera is a toss-up between the ASI120MC and the Lu070m (icx424al)

    The scopes are those in my signature if its any use :)

    I knew for visual purposes the magnification is way too high, esp for the SCT -  but for imaging its not quite so extreme.

    There are formulas and such that apply but my maths is awful :p


  15. Hi, 

    Can anyone tell me whether a C8 will accept a 5xpowermate for planetary imaging?

    I have seen a number of great images with similar combinations to the above, and recently tried 3x barlow with the C8 and it seemed to be pushing the scope a bit, but ive no idea whether the scope can handle 5x easily or whether its depending on seeing conditions being good. etc.

    The actual scope is in need of better colimation so that might be a factor affecting the test using 3x barlow. :p

    Any ideas hugely welcome 

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