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#7351 wargrafix

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Posted 14 February 2019 - 09:39 AM

Another section of the Orion nebula that looks straight out of a painting

 

93 frames at 372 seconds

 

med_gallery_218407_321_421594.jpg


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#7352 wargrafix

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Posted 14 February 2019 - 09:46 AM

Finally, the orion nebula waterfall

 

93frames at 372 seconds

 

med_gallery_218407_321_27408.jpg


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#7353 Rickster

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Posted 14 February 2019 - 01:50 PM

Those last 2 shots are an interesting perspective on M42. Artistic feel.
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#7354 wargrafix

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Posted 14 February 2019 - 02:14 PM

Those last 2 shots are an interesting perspective on M42. Artistic feel.

Thank you!!!

 

F3.3. is the bomb!

 

Need to figure out an off axis guiding solution.



#7355 NaNuu

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Posted 14 February 2019 - 02:45 PM

Another Iwamoto NGC 2903 meeting from last night -indeed, Iwamoto is quick!

 

5min a 60x 5s stack, saved as viewed, ASI 183 mc Pro (-10C), bin 2, subtraction of darks, Gain 270. Nexstar 6SE with 0.63 reducer and IR/UV cut. JPEG converted.

 

Stack_60frames_300s.jpg


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#7356 Stargazer3236

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Posted 14 February 2019 - 05:45 PM

Iwamoto was moving so fast, by the time I wanted to get out and image it next to NGC 2903, it was already past it.


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#7357 Kaikul

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Posted 15 February 2019 - 03:36 AM

Thank you!!!

 

F3.3. is the bomb!

 

Need to figure out an off axis guiding solution.

I hear ya! I've almost given up on my 0.33x but saguaro has given me tips. Unfortunately, I can't even go take my scope out because of all these cloud cover.


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#7358 wargrafix

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Posted 15 February 2019 - 07:24 AM

I hear ya! I've almost given up on my 0.33x but saguaro has given me tips. Unfortunately, I can't even go take my scope out because of all these cloud cover.

Currently I have a 9.25 sct, the meade 3.3 reducer, a 224mc imagine camera and a 224mc guiding camera. This is the base I am working with. The first is...what mm is required to reach 3.3 reduction.

 

The stated 85mm won't even allow for focus. Too far out



#7359 Stargazer3236

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Posted 15 February 2019 - 08:24 AM

Here is a chart, from Agena Astro, posted for reference only, that highlights what you can achieve with a 0.5 Focal Reducer and different spacers.

 

 

Attached Thumbnails

  • Focal Reduction.jpg

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#7360 saguaro

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Posted 15 February 2019 - 09:31 AM

Currently I have a 9.25 sct, the meade 3.3 reducer, a 224mc imagine camera and a 224mc guiding camera. This is the base I am working with. The first is...what mm is required to reach 3.3 reduction.

 

The stated 85mm won't even allow for focus. Too far out

I use the Meade 3.3 reducer with my 290mm, which has a similar sensor size to your 224mc. I've found through trying different spacings that I like the image scale and focal ratio of F/4 that I get when I use 46.5mm of spacing from the back of the focal reducer to the camera sensor. To accomplish this, I use an Antares, SCT-T thread adapter (Short) (https://agenaastro.c...dapter-30.html)

plus a 15mm T-spacer. This results in a total spacing from FR to sensor of 34mm + 12.5mm (camera backfocus) = 46.5mm. Adding more spacing between the FR and the sensor will increase the amount of focal reduction, so you might start with around 47mm and make small spacing increases to get to F/3.3.

 

You can plate solve one of your images to get your actual focal ratio. I use the info at this page to determine focal ratio: http://www.astropix....nd-focal-ratio/


Edited by saguaro, 15 February 2019 - 10:23 AM.

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#7361 wargrafix

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Posted 15 February 2019 - 10:33 AM

Ah! very good. So the question now, is what do we need to achieve an off axis solution



#7362 wargrafix

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Posted 18 February 2019 - 02:20 PM

So, had a star party event. Big moon, which got clouded out. I used celestron T adapter, and i think i got close to 3.3. The above images apparently weren't 3.3. What I did get to show people, blew their socks off i will upload the saved image later



#7363 wargrafix

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Posted 28 February 2019 - 09:10 PM

Weather has been very very iffy, But you need to make use of the lemons

 

Starting with a very quick and dirty M51

 

15 frames at 240 seconds

 

med_gallery_218407_321_937695.jpg


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#7364 wargrafix

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Posted 28 February 2019 - 09:17 PM

Faring a little better, M99

 

38frames 608 seconds

 

med_gallery_218407_321_673589.jpg


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#7365 wargrafix

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Posted 28 February 2019 - 09:22 PM

First time imaging this target. The whale galaxy is quite a sight! How do you think people would react to this view in a public event?

'

 

68 frames   1088seconds

 

 

med_gallery_218407_321_486725.jpg


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#7366 wargrafix

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Posted 28 February 2019 - 09:25 PM

During the night seeing was not good at all. Here is a Cocoon galaxy attempt

 

1120seconds, 70 frames

 

med_gallery_218407_321_291449.jpg


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#7367 wargrafix

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Posted 28 February 2019 - 09:27 PM

Antennae galaxies, another first for me!

 

72 frames 1152 seconds

 

med_gallery_218407_321_508231.jpg


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#7368 wargrafix

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Posted 28 February 2019 - 09:29 PM

Eskimo nebula

 

1958frames, 970 seconds

 

med_gallery_218407_321_198966.jpg


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#7369 wargrafix

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Posted 28 February 2019 - 09:31 PM

Finally, NGC 3521. Its quite a sight!

 

By the way, all of these batch of exposures, were over a single night

 

54 frames at 864 seconds

 

med_gallery_218407_321_353065.jpg


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#7370 geminijk

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Posted 06 March 2019 - 11:12 AM

1st night in a long time, so finally getting around to putting an ASI183mm, that is on loan to me, through its paces. 

ES3.9, ASI183mm, LPS1 filter, direct capture from SharpCap.  7x60sec, no flats, no darks, no post processing. Gain at 100

Attached Thumbnails

  • 47295688251_edac89604c_z.jpg

Edited by geminijk, 06 March 2019 - 11:13 AM.

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#7371 wargrafix

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Posted 06 March 2019 - 08:16 PM

Sahara dust combined with unpredicable weather made a difficult weekend campaign. Local seeing was particular bad causing all sorts of mayhem.

 

 

But southern targets present a challenge for my latitude.

 

Keyhole nebula an Eta Carinae nebula

 

81 frames 1296 seconds

 

med_gallery_218407_321_491839.jpg

 

396 frames at 6336 seconds

 

med_gallery_218407_321_467024.jpg


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#7372 skyguy88

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Posted 08 March 2019 - 07:01 PM

Half a million views on this thread. Not a niche anymore!!!! bow.gif waytogo.gif

 

Bill


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#7373 NaNuu

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Posted 12 March 2019 - 02:36 PM

It's been two weeks from today that I had the chance to take a glimpse of M46 and M47 (and also NGC 2438, a planetary nebula) using the little Photoline 60/360 Apo with the appropriate flattener (no reducer!). Here is what I got from my city balcony (Bortle 5) using: 

 

* app: Sharpcap 3.2 with histogram adjustments using dark subtraction, saved as viewed

  (just changed to compressed jpeg)

 

* exposure: 30x 30s = 900s total integration 

 

* cam: ASI 183mc Pro at -10C, gain 111

 

M46 (left, with the tiny NGC 2438), M47 (right) and traces of an airplane.

 

Stack_30frames_900s.jpg


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#7374 39.1N84.5W

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Posted 17 March 2019 - 08:46 AM

Really tickled to get Thor's helmet from my urban observatory and with a big waxing moon up! I've got two big houses that block my southern sky so my window of seeing this is tight. Looking forward to a moonless night and a second attempt. Had to turn cooling off because the camera fan is causing star bloat.

 

53x15s, asi294c, gain at 300, dark applied, IDAS nb1 filter, binning at 2, no autoguiding, 8" f4 newt, sharpcap, John Barr scotch.

 

thors helmet, 53x15, idas and bin2 and dark.JPG

 

 


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#7375 jonalmada

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Posted 23 March 2019 - 12:27 AM

Thanks saguaro. I was happy to observe and broadcast whole event with comet passing galaxy field:

https://www.youtube....h?v=q7ARtJX25-A

Loved this - I subscribed to your channel...


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