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Posts posted by eshy76

  1. While I was waiting for my Astrodons to arrive last year, I got impatient and bought this ZWO LRGB 36mm set to experiment with my new mono setup. I used them for one night experimentally and have not touched them since - probably best if they see a new home!

    I believe these are the "newer" version of the ZWO filters, as they were purchased last year as mentioned - you can see from the photos that they are in almost new condition. Original packaging included. They are unmounted.

    Asking price is £150 including UK postage. Paypal is the preferred payment method.

    Thanks for looking!




  2. Having moved to an OAG, I've decided to part ways with my Orion 50mm guide scope with helical focuser. 

    It is used, but in very good condition, with some minor wear apparent on the included adapter plate, not the scope itself.

    Includes original box, scope, scope bracket, vixen style shoe/holder and adapter plate + 2 screws as can be seen in the photos.

    Asking price is £55 including UK postage. Paypal is the preferred method of payment.

    Thanks for looking!




  3. I've mulled over this one a lot, but have decided to sell my ZWO ASI294MC Pro camera, which I bought new about 6 months ago, to focus on my mono imaging.

    The cooled camera itself has been used on maybe 8-10 nights in total with some really good results, as can be seen in the example pictures I attach.

    All spacers, adapters, cables and instructions are included, as can be seen in the pictures, as well as the original box. It is in pristine condition.

    Asking price is £820 including UK tracked delivery. Paypal is the preferred payment method.

    Thank you for looking!







    Moon 15-02-19 OSC (resized).png

    Orion's Belt February 2019 (Downscaled) - V2.png

  4. Now that I've upgraded, I am selling a key piece of equipment that propelled me into astrophotography - the iOptron Skytracker V2. This lightweight device (about 1.5kg) is great for grab-and-go astrophotography. A ball head mount (not included) is required to attach a DSLR to the tracker, which, in turn, can be attached to a standard camera tripod.

    It is used, but in excellent shape and includes the tracker itself, carry case, polar scope (illuminated by the tracker) and instructions. It is powered by either 8xAA batteries (not included) or via a standard 12V DC connection.

    I've included a photo of Orion which is an example of what I was able to achieve using this nifty tracker!

    Asking price is £160 including UK postage. Paypal is the preferred payment method.

    Thanks for looking!






    Orion's Belt and Nebula 07-03-18.jpg

  5. 23 hours ago, bottletopburly said:

    Have you ever asked @Yoddha ivo for help on APT forum  with regards to getting blind to work , he is very helpful at resolving issues you may have


    Hi there - Yoddha has been super helpful in addressing any problems I have had with APT...he helped me with the Platesolve2 approach I've settled on...I haven't really felt the need to go to blind solving yet.

    • Like 1

  6. Hi there - I also have not been able to get blindsolve to work in APT...so I just stopped trying. I just use Platesolve2 instead.

    My workflow is:

    1. Turn everything on - usually my mount is in zero position here

    2. Slew away from Polaris (apparently platesolving can go haywire at the pole) - I usually use the simple GoTo function in APT to pick an object for this or Cartes du Ciel - do not worry if the slew is inaccurate, you are just trying to get away from Polaris

    3. Hit "Shoot" to take an image - 10 second exposure or so should be fine

    4. I then click on Pointcraft and then on "Scope position" which populates the coordinates the scope thinks it's at. Then I hit "Solve"

    Within about 20 seconds this is successful on the first attempt and I then hit "Sync" to make sure APT is dialled in - all the Goto++ functionality works perfectly after that and subsequent "Solves" are usually successful within 10 seconds.

    The only step which might be superfluous is the "Scope pos" bit, you might be able to hit "Solve" directly after the initial slew.

    I'd love to get blindsolving working, but the above method has been foolproof for me, and given the blind solve takes longer as it's solving more of the sky I believe, I'm not sure it would necessarily be faster.

    Hope this helps!

    • Like 1

  7. Hi Mark - I got 2.4 hours of integration time over three nights, 89x75s at ISO400 at 135mm and 6x300s at ISO800 at 430mm. APP put it all together easily - I think the lack of noise is due to 1. Antares being overhead in Mauritius away from light pollution 2. Using dithering 3. Using quality weighted subs when stacking in APP 4. Processing technique - I used TGV Denoise and MMT in PI, with bright masks.

    Hope that helps. Here is a link to the higher res version: https://www.astrobin.com/356347/C/?nc=user

    • Like 1

  8. 1 hour ago, teoria_del_big_bang said:

    Believe me I am with you all the way as in exactly the same situation with the ZWO1600mm and also using APT. 

    I was unaware that you could set different gains in the filter settings dialog of APT and had to use scripts to do it, until I saw this thread.  I too am on V3.63 and if I click on settings for the FW when on the Gear Tab I too get the dialog same as above that does not have any gain settings (I believe this is just the Ascom Dialog APT opens).


    But if I go to the "Tools" Tab and click on "Settings" and then click on the "Filter Wheel" "Tab in Settings" I get the following:-

    However, I have just seen this so not tried it to see if it works but I guess it should, most things do just seem to work in APT.



    I don't know if this helps but I have learnt something today at least ? 


    Hi Steve - yes that's exactly it - Tools/APT Settings. Once you plug in figures for gain per filter (and autofocus offsets if applicable) in the dialog in your screenshot, whenever you select the filter in an imaging plan, the same gain/focus offset will be brought into the plan...very convenient once you've settled on what you want to use. 

    • Like 2
    • Thanks 1

  9. 1 hour ago, Starwiz said:

    I'm also on 3.63, so it's probably not that.  What ASCOM version are you running?



    Hi there  - I'm on a pretty recent Ascom version, maybe not the latest one....however, the answer is in the post above this one. When I set up my filter wheel, I use APT's settings, not the Ascom settings, so Tools/APT Settings as specified by Steve. That should work.

  10. 5 hours ago, Starwiz said:

    Any thoughts on why I can't see the gain settings for the filters?




    Hi there - do you have the latest version of APT? I believe the gain per filter was only recently added. I have version 3.63. APT is not updated within the program - you have to download and install the new version over the old one. Settings survive that process!

    That would be my best guess.

    • Like 1

  11. 25 minutes ago, alan potts said:

    Both look very nice indeed and to think you were not expecting much from, turned out well, must try this myself when my roof allows me to.


    Thank you Alan - yes, I collected the data pretty much as a side project to the tadpole/flaming star mosaic I was working on. It wasn't one of my primary targets for the winter - I was also after M45 and the Horsehead - so the data just got forgotten. But processing the clean narrowband data was a pleasure and NGC 281 itself surprised me with its pillars of dust and the little star cluster at its heart. It's a beautiful object in its own right, which I realised when I zoomed in.

    • Like 1

  12. Hi everyone,

    This has been on my hard drive for some months, so nice to have finally got round to processing it! Shot over several nights in January in my back garden.

    NGC 281, also known casually as the Pacman Nebula, is a bright emission nebula and part of an H II region in the northern constellation of Cassiopeia and is part of the Milky Way's Perseus Spiral Arm. It lies about 9,500 light years from us and is 48 light years across.

    As the final version, I've gone for a crop, which I think holds up well, though I'll include the wider fov version in the next post.

    I used a more natural colour blend for this image:

    R = 76%*Ha + 24%*SII
    G = 100%*OIII
    B = 85%*OIII + 15%*Ha

    For some reason, I was not expecting much from this image, but the result looks like it will be one of my favourites...the narrowband data was really good!

    Captured using APT, stacked using APP and processed in Pixinsight.

    5.4 hours integration time.

    Link to full details and higher res version.

    Thanks for looking!


    • Like 4

  13. 11 minutes ago, david_taurus83 said:

    Not used the scripting in APT but I know the gain is selected under the settings tab near where the cooler aid tab is. Don't make the same mistake I did last week. Captured 4 hours of data with a gain of 0 when I thought it was at unity!!

    Yep done that one too....one to add to the slapstick astro mess ups...though not as bad as taking 20 mins to realize that the cap was still on my polemaster once...the hot pixels looked like stars on the ipad screen...it took me time to figure out why they weren't moving when I rotated the RA axis....!

    • Haha 2

  14. 1 hour ago, Starwiz said:

    Many thanks.  As you suggested, I can only think it had selected the guide camera as it works now.  I didn't know that leaving the gain setting blank means it can be overridden so that's useful info.  I've found out how to do it using the APT scripting today, so if that works when I try it, I think I'll be using that method.  It also means I can script in the cooling at the start instead of using the cooling aid.  I forgot to do this this the other night so ended up with all my subs at 14 deg instead of -15, so if it works OK it's helpful to be able to 'set and forget' in advance.

    The way it works is that if you put a gain number in the little box on the camera tab, that will override whatever was in the Ascom driver pop up, for a single shot and for an imaging plan - *if* you haven't assigned a gain to each filter in settings.

    In APT's settings when you set up your filter wheel, you can add a couple of things per filter which are useful as defaults for every time each filter is used - (1) the focus offset, if you are using autofocus and (2) the gain. So I tend have 139 assigned to LRGB filters and 200 for narrowband filters for example. I then leave the little box on the camera tab blank to make sure it doesn't override the filter wheel settings I put in when an imaging plan starts.  

    It works perfectly for me....APT's scripting is pretty powerful...I also used it to platesolve to another target (Goto++) and restart PHD guiding in the same night...worked fine.

    Glad it's working for you now!

    • Thanks 1

  15. Hi there - this seems very odd - I have the same camera and also use APT, and I'm pretty sure the gain can be set higher than 100. I tend to use 139....

    My first reaction to your post is that you might not have the right driver selected in APT....to check, click on the "Settings" button next to the camera name at the bottom of the APT screen...then make sure the ASI-1600 is selected specifically from the driver drop down menu in the Ascom screen that pops up.

    Personally I tend to set the gain using the Ascom driver (in the same "Settings" pop up) and leave the gain setting blank in APT itself - this is because in my filter wheel setup, I have a different gain associated with each filter and I don't want that overridden by the manual gain setting on the camera screen.

    Let me know if you need me to explain the above more clearly...happy to help!

    • Like 2

  16. On 26/04/2019 at 11:12, Demonperformer said:

    Here is a link to the video. This is good if you wish to explore the theory a bit further.

    I watched the vid and read those posts yesterday - superb! The new stuff versus what I had read before was actually getting a number for light pollution and incorporating that into the equations.

    It was an impressive presentation and makes me want to dig deeper into Sharpcap, if its creator is so knowledgeable.

    Thanks again for sharing!

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