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Posts posted by teh_orph

  1. Thanks all :)

    Very nice indeed. I'm curious to know how you managed to capture this. Did you shoot in colour then convert to mono or have you modified your DSLR to only image in mono?
    I've been collecting Ha and O111 the past 2 nights of this with my astro modded 600D and astronomik 12nm clip in filters.
    I seriously need some darks though as it's drowning in noise at the moment

    My camera is unmodified, apart from removing that IR filter directly in front of the sensor. I'm imaging in colour, and then dropping the other three pixels' worth of data. Tbh I'm not happy with the way I do this, what system do you use?

    Really I want to just take my RAW files and drop the GG and B leaving R, but there's no software which I can find does this nicely. I can't do it reliably in dcraw: it works ok on the light frames but it ruins the flats and darks. The best I have found so far is to use DeepSkyStacker and *disable the black point=zero* check box, set red=1, blue=1 and luminance=1 whilst using the super pixel option. There's still green data in the image though...

    Omg that noise though.

  2. Hello guys

    I can see why people get addicted to imaging... I replaced my EQ2 scope with a EQ5 + 200p in January and have been making progress with guiding. However as I live in London I can never really use an exposure longer than about five minutes due to the light pollution...or at worst just 30 seconds!

    I recently sourced a second 1000D, removed the IR filter and DIYed in a filter holder into my optic train and added a 1.25" Baader 6nm Ha filter. For the last few weeks I've been experimenting with imaging like that and finally have an image when using the equipment in anger.

    Five hours of Ha from 20x15 minute images across several nights. Flats and darks for each set of images, combined in DSS and worked in Photoshop CS6. You can really see the noise still; I'm going to Peltier cool the sensor next.

    Feedback please! I'm resisting buying OIII so I can add some colour...! I will be adding more data to see if I can get the noise down. Tone mapping this was really tricky - trying to get the stars to not saturate was a right chore.

    Kit info etc:





    • Like 9
  3. Hi guys,

    long time no post...

    I moved house last year to a much better place - astronomically - to where I used to live, but still not great considering it's in London and got myself a new scope. I've been very keen to get a snap of Pluto before New Horizons reaches it and have been waiting for May to roll round when it's a doable place from my house. Unfortunately I have no view of the south, and Pluto rises quite low in the south so I have to suck it up and go stand on the South Circular and risk getting mugged to get a picture!

    Unfortunately every weekend for me has been cloudy so I risked it on a school night last night and set my alarm for 2.45 am.

    The sun starts to brighten the sky at ~3.20 so there's a strong brightness gradient in the sky. This greatly limited my exposure time. The best I could manage before blowing out the image was ~13 seconds at ISO 1600. I was also genuinely worried about attracting attention and getting my camera and work laptop nicked so only ~5 minutes of integration time.

    I'll try again as soon as possible and get another shot to show that it's moved.


    Click the image for a larger version.

    Suffice to say my girlfriend was quite impressed with that tiny dot  :grin:



    • Like 6
  4. There is a bug in 3.36 which prevents you from recovering alignment after a park. Actually it is not completely lost. as if you try a new alignment it knows where to go! But you cannot slew to an object. The only solution appears to be to redo the alignment. Hopefully Skywatcher are going to fix this, as it is a real pain. 3.35 did not have this problem.


    Woah, this sounds like what I've got! Where can I get 3.35 from? On the web site I only see 3.27, which I cannot flash and 3.36.

    I bought the goto to save myself time, as using my EQ2 in light polluted London I would spend serious time navigating to an object. Now I spent my time calibrating!

  5. Hi guys,

    I just bought an EQ5 GOTO mount from FLO...but I think there's a bug in the software. It's pretty obvious yet I can't find anything online so perhaps it's a handset fault.
    Can anyone try and reproduce it with theirs? (you don't need to see stars to do this :))

    After calibration and parking the mount, it requires me to calibrate every time after powering off the mount.

    Here is how to reproduce it.

    Hardware 3.06 firmware 3.36 database 3.28.

    To reproduce,
    - factory reset handset via menu
    - turn off handset
    - turn on handset
    - set location 000"00'W 51 deg 27' N
    - set time zone +00:00
    - set elevation +0000m
    - date 02/22/2015
    - time 21:32:00
    - daylight saving: no
    - begin alignment: yes
    - 1-star align
    - Sirius - ok
    (mount slews near to Sirius)
    - press enter (do not bother to correct the angle)
    - utility->show position
    dec=-16 deg, 43' 53"
    - utility->show information->P.A. error
    Mel=+000 deg 00' 00"
    Maz=+000 deg 00' 00"
    - utility->park scope->home position
    - press enter
    (mount slews to home position)
    - turn off handset

    - turn on handset
    - start from park - yes
    - set location 000"00'W 51 deg 27' N
    - set time zone +00:00
    - set elevation +0000m
    - date 02/22/2015
    - time 21:37:00
    - daylight saving: no
    - utility->show position
    dec=+(strange character)7 deg (strange character)7' (strange character)7"
    RA=+(strange character)7h (strange character)7mw 6.7s

    - press down
    alt=(strange character)7 deg (strange character)7' (strange character)7"
    azm=w67 deg (strange character)7' (strange character)7"

    - utility->show information->P.A. error
    Mel=+w67 deg (strange character)7' (strange character)7"
    Maz=+w67 deg (strange character)7' (strange character)7"

    - object->named start=Sirius
    (slews to point below the ground)
    - utility->show position
    dec=+(strange character)7 deg (strange character)7' (strange character)7"
    RA=+(strange character)7h (strange character)7mw 6.7s

    As you can see, after parking all the calibration is lost. It is not acknowledged that it is lost either, and 7/7/7 appears in all the data.

    Repeated flashing/factory resets give the same result.

    Repeating the process will always give the 7/7/7 stuff.

    Any help? Can anyone else reproduce this? Calibration where I live is pretty painful, as I can't see the western sky!


  6. Ah I've got one of those too! I much prefer the PSEye to be honest. The compression artefacts are annoying (PSEye is uncompressed) and there's a much higher green noise level IMO. I find I get much cleaner looking pictures with this camera. The infrared response seems much better with the Philips though. Finally when using the Philips beyond a certain capture frequency the spatial resolution is actually halved (but it doesn't tell you) in order to still be able to fit the data down USB 1.

  7. Hello guys

    sorry about another Jupiter, but I figured I'd only add it to the list as I'm so pleased to finally see the great red spot!

    I think I've come a long way...with the same kit! SW 130P, double-stacked barlows (SW + Celestron Ultima), PS3 PSEye camera.

    Here's my take from last year:


    ...and here's from midnight Friday night/Sat morning. I clocked a dark mark on the surface which I took to be the GRS. After stacking it I completely missed seeing the GRS (which came out a lot lighter than I expected). The dark mark is clear in the finished image, which is a combination of infrared and RGB. Io can be seen on the left.


    Thanks for looking


  8. Tbh they don't, so I use a barlow with the glass elements removed as an extension tube. Since the camera's sensor is so far recessed into the housing it's hard to get both EPs and camera to focus without modifying the focuser. I have the springs and grubs screws set so there's about 0.5 mm spare back focus for the camera and the EPs are at the complete other end of the rack and pinion focuser!

    I'm so pleased with the result though. The FOV is much better without the barlow and I get the same problems other people get now. I get coma in my images! I can also locate things in a flash! No more "what is that star?"

  9. Holy thread bump batman!

    I just performed this mod on my telescope...and it works!

    I have a 130P and a Canon 1000D but could only get focus before with a Barlow. With an EQ2 mount the tracking isn't the best so the Barlow made it worse!

    I've got 5mm threaded grub screws in the place of the original screws, roughly two inches long, with wing nuts on the end. The mirror is held in place with some strong springs. Collimation is now unbelievably easier, and the camera comes to focus too! I do need extension tubes for eyepieces though. I had to make no permanent modification to the OTA - everything is reversible. No cutting of anything :)

    Pics and full details if anyone wants them.

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