retret66

1 hour ago, nfotis said:

Interesting technique (though I had a hard time discerning the menus and textboxes in my 14" screen of my laptop, I think that the big trick is setting the black point in order to eliminate the borders). What happens if there's  also some rotation between the different scope images? Does registration account for this as well?

 

N.F.

The rotation will not have any issue with registration, it will pick it up, the initial adjustment of shades of gray/exposure to match will play a big role in the black level adjustment, the less adjustment the better but I tried them all and I cannot find any noticeable on drop of quality. Apologies about the small menu, was recording it via a 6K screen and adjusted pixinsight core UI larger, maybe next time I will double it

The purpose of this is when you have a wide field image that lacks the details of a larger scope therefore replacing an area with the more detailed image without seeing the border lines. I made this as simple as possible because I cannot find any tutorial for this kind of processing. Hope this helps you.

Telescope: https://flic.kr/p/2m28Xaz

Camera: ZWO ASI174MM w/ Baader 35nm Ha

Since I am waiting for my ERF to use for my 102mm scope. I tested this on Lunt 60mm and remove the external etalon. So it comes out to a Dual stack but with quark and pressure tuned etalon. The detail is way better than adding a 4X powermate on a dual stacked Lunt.

I recently upgraded all my reducer/flattener to APEX ED .65x to bring each scope to F4.5 @464mm focal length each. Middle is the reference FOV, both sides are on an AZ saddle so it is easier to match the middle. This has been my main DSO scope for couple of years now and will be replacing the mount with CEM70 backordered and move the current CEM60 to my RC10. Absolutely no flexture on all scope. I use OAG for guiding. The advantage for tri-scope is to eliminate filter wheel. When moon is bright I utilize all 3 Ha filters then do more OIII during moonless nights. Focuser used are Boss II and optec lynx. All 3 main cameras, 1 mount, 1 guide camera and 3 focusers are all fed to the CEM60 cable management port to a single 16Ft USB2 cable. APT is used for imaging with synchronized multicamera and dithering. The scopes are covered and stays outside, setup time 15min from uncovering to imaging.

I just got the L version because the S version is for 500mm FL or below.. I use it for my RC10. Corner stars here with ASI294MM camera

https://www.cloudynights.com/topic/737568-first-light-for-starizona-apex-l-ed-065x-reducer-flattener/?p=11019320

This was taken with Lunt Double Stacked Ha 60mm B1200 Pressure tuned scope and ZWO ASI174MM camera. Cheers

4 hours ago, tooth_dr said:

Very rich in colour!  You have a lot of Ha - 36 hours - versus just half of that in luminance. Was this a conscious decision or one dictated by the set up of your imaging rig?

I got tired of it and intended to put at least 50hrs of luminance but the whole week of cloudy weather and 3 ZWO ASI183MM came, so I will top for a while and will continue with all luminance again.

M31 - Anromeda in HaLRGB - 97 Hrs over 8 nights 😆
Luminance = 579 x 120s / 19.3Hrs
Red = 167 x 300s / 13.9Hrs
Green = 172 x 300s / 14.3Hrs
Blue = 169 x 300s / 14.0Hrs
H-Alpha = 432 x 300s - 36Hrs
Scope: https://flic.kr/p/2gAfKn7

Higher Resolution:
 

https://drive.google.com/file/d/1Vcs2prt_4VntF8jYRi8KX7OId5lXZMoN/view?usp=sharing
https://drive.google.com/file/d/1_Lj-cpsp6CuFfLv-pVQUdn1QB9MLwUBJ/view?usp=sharing

Imaged over 7nights, 93.6Hrs integration

Filters used:
3x Astrodon 3nm OIII
3x Astrodon 3nm H-Alpha 
Exposure Info:
336 x 5min = OIII
340 x 10min = OIII
54 x 10min = H-Alpha

Telescope: https://flic.kr/p/2gAfKn7

Thanks to all and thanks to work from home Covid thingy LOL

84 Hrs 😂

Added more to a total of 65 Hrs on OIII, very small difference and I think tonight will be my last attempt for this...

After the first night when the smoke no longer in the east coast I was able to add more for a total of about 35hrs on OIII. 571mm @F5.6 on Bortle 6. I will add more tonight and excellent seeing and transparency on the forecast. Most likely another 15hrs will be added tonight.

336 x 300s OIII
47 x 600s OIII

We have similar style and I love the yellow to cyan transition.  We both can agree that when we image 3 different channels, we should get 3 different colors to separate..

I accepted defeat on this object last year when I tried it and I went back on this last night  with my new configuration, my previous was a triscope @F5.6 400mm canon lens and the 3hrs OIII only barely shows the outline on the tip. Now with the new configuration 714mm F7 reduced to 571mm @ F5.6 and 3x 3nm OIII and in one night I was able to make out the squid with 3.5hrs of imaging time (or about 10.5hrs data) in single night. The tri-scope is equivalent to F2.8 single scope. Tonight I have another 4-5hrs of clear sky in the forecast so hopefully I will get more detail. I have bortle 6.

Telescope: https://flic.kr/p/2gAfKn7

 

121 x 300sec Gain=200  Offset=45 on ZWO ASI1600MM

I did build an RPi 3+ a year ago to make my triscope completely wireless in case I moved to a different house. Without any complicated setup I loaded Indigosky on it. Everything works, 3 cameras simultaneously, dithering, PHD2 all worked. I use APT which support Indi bridge. This is how I set it up.  

I have Astrodon 3nm SHO and LRGB, even though they say it is parfocal, I find it still slightly out of focus and I think this is probably due to manufacturing tolerance. This is why I turn to a tri-scope to eliminate changing filters many times during a session.

Taken with Lunt 60mm Pressure Tuned Double Stacked telescope. Full image was taken with ZWO174MM and the close up prominence is taken with ZWO ASI290MM with powermate 2.5x.
Exposures: 
Full disc: 5,000 best frames out of 10,000 in AVI format
Close up: 1,000 best frames out of 5,000 in SER format

33 minutes ago, MarkAR said:

Lovely image, it's showing quite red on my screen though. Also like your triple rig set up.

Interesting, color matches with my iphone which I use for reference.

Finally got a decent data but I think I can get more tonight. So far this 2-panel mosaic has about 25hrs of data taken on 08/21 and 08/24.
Telescope: https://flic.kr/p/2gAfKn7
Camera: ZWO ASI1600MM
Exposures:
Ha = 201 x 300s (G200/Off 45)
SII = 53 x 300s (G200/Off 45)
OIII = 54 x 300s (G200/Off 45)
All processed in Pixinsight.

15 hours ago, simmo39 said:

Stunning! I was thinking of doing this target as my season starter but need to be quick as it hides its self behind trees!

This was the main reason for me on my previous place when I built this, most object I only have 2-3hrs window and it is a waste of clear night.

2 hours ago, david_taurus83 said:

That's some setup! Do you ever get alignment or flexure issues?

Alignment and rotation only on first setup and/or change of camera. Zero flexture on OAG, with over 1000 images I took it has zero flextures. Only if my mount is acting once in a while but all 3 will be discarded

Taken on Aug 20, 2020
Distance: About 7000 Light Years
Telescope: https://www.flickr.com/photos/129168751@N04/48301682372/in/dateposted-public/
Cameras: ZWO ASI1600MM

Filters used:
Astrodon 3nm H-Alpha
Astrodon 3nm SII (Sulfur 2)
Astrodon 3nm OIII (Oxygen 3)
Focal Length: 571mm
Total integration time: 12hrs /Imaging Time: 4hrs