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10-Minute Max Challenge. What's possible? Please post your best

EAA Imaging
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#1 Leafus

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Posted 25 June 2022 - 08:58 AM

The topic title says it all. Post your favourite images taken in EAA style but UNDER 10 minutes total.

 

I have seen some great images in the EAA forum, but many are over longer time periods. I honestly don't have the patience for waiting more than ten-minutes (ten seconds would be best), so I am really keen to see what's possible at the "nearer live" end of the EAA spectrum.

 

Images of better known objects would be great, but anything that showcases what's possible in under ten minutes - or better even less.

 

Please put on details - Object/Scope/Camera/Mount type/Bortle and particular Sub Time/Total Time.

 

I can't wait to see what you all have to show.

 

Thanks in advance.


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#2 JTNX01DC

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Posted 25 June 2022 - 09:19 AM

Brilliant idea!



#3 GaryShaw

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Posted 25 June 2022 - 09:33 AM

Hi

Literally anything we'd ordinarily want to observe can be captured within a 10 minute SC live-stacking timeframe. Any longer than that and I'd either be taking my time and sketching the onscreen DSO or I'd be taking an AP-lite approach to trying for more subtle detail in the image than would normally (for me) be necessary for just the observation. I guess I say all this in the context of my F/4, 203mm aperture. A RASA would require quite much less time and a 6" reflector or refractor would likely require more time.

 

Gary

 

PS: My humble CN 'Gallery' is pretty dated with most images captured by my 142" F/3.6 scope but I think only one of them was any more than 5 minutes.  You can take a look here if you'd like:  https://www.cloudyni...ms&section=user

 

 


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#4 Jim R

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Posted 25 June 2022 - 10:08 AM

Gary, your link leads to MY albums and images, which is empty.  Can you change the link to go to yours?



#5 MarMax

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Posted 25 June 2022 - 11:04 AM

That's an interesting link because it must point to each users Gallery.



#6 BrentKnight

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Posted 25 June 2022 - 11:09 AM

AP (very lite) for me, so probably no posts, but I'll enjoy what others share!



#7 MarMax

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Posted 25 June 2022 - 11:35 AM

My 1st light with the Uranus-C topic has M57 at 4 minutes and M27 at 10 minutes.

 

NGC 6888 with 8.3 minutes. Details with the images in the Gallery.

NGC6888 Hyp NCII ALPT 62F 496S NoEdit 06102022m

 

 

M13 with 10 minutes.

M13 C11uag 533 g350 150f 600s nOeDIT 06182022m
 
EDITED to say that many of us run about 15 minutes maximum on objects so there will be a lot of 10 minute images. As far as the "best", we can hope that some of the "really good" EAA'ers post up the good stuff.

Edited by MarMax, 25 June 2022 - 11:51 AM.

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#8 Leafus

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Posted 25 June 2022 - 01:00 PM

Hi Marmax, thanks for posting those great images. The Dumbell looked awesome in that link, and the crescent is cool. I tried to catch sight of the crescent two nights ago and could not see a trace even though I was in the exact right place - but just with visual and iPhone13 though the iphone camera can normally pick up a vague trace if somethings there. I wonder how much a filter would help. The fact its not even going to night here in Midlands UK does not help much either. 

 

Regarding the 10 minutes as max, I set it more for my own boredom threshold. Maybe if we get enough nice images on this one, we could repeat for 5minutes or even Single-Sub shots.


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#9 nic35

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Posted 25 June 2022 - 01:30 PM

L:

 

Here are two - the rosette -  just over 8 minutes total exposures, shot through an L-enhance filter.  30 second individual sub exposures through a Stellarvue 90mm triplet.

 

and one of the horsehead and flame, a little over your 10 minute limit, since I suspect at some point your curiosity will get the better of you.  Same rig, just under 15 minutes.

 

 

enjoy.

 

j

 

 

rosette as viewed 480 seconds.jpg

 

 

horsehead 885 seconds.jpeg


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#10 MartinMeredith

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Posted 25 June 2022 - 01:59 PM

Good idea for a thread! I'm mainly in sub-10 category myself but not for any principled reason. Hard to choose one image but this is one I really enjoyed observing because 

 

1. it is unusal to fit two globs in a 0.34 x 0.44 degree field (this may be the only such pair)

 

2. It shows what is possible with a 0.4 megapixel sensor with 'high' read noise CCD camera (Lodestar X2 mono) with no calibration at all

 

3. This pair is at -30 degree declination, so really very low here at 42N; amazing what EEA can pull out of the murk.

Attached Thumbnails

  • NGC 6522 25Jun22_17_26_26.jpg

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#11 steveincolo

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Posted 25 June 2022 - 02:09 PM

Not sure I can claim to having "bests" yet, but here's the Rosette Nebula in 5 minutes.

 

Rosette Nebula

 

And the Cocoon Galaxy in 8 minutes 20 seconds.

 

NGC 4490 30Apr22 23 49 44

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#12 Leafus

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Posted 25 June 2022 - 03:36 PM

Nic35: Loving that Rosette Photo. Incredible that short exposures can get that. I’m going to have to get a frac to go with my CPC925. I need that FOV.

Steveincola: wow on both. Can’t believe it’s possible. I’m inspired. Soon as I finalise my Camera choice I hope to get half as good.

Martin: Great shot. I’ll take a look and see if I can see those.

I’m out tonight trying to see this 5 planet line up. But it’s really low. And By the time theyre up it’s pretty muc dawn. Hopefully just be able to make them out. 4am. Gotta try though
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#13 alphatripleplus

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Posted 25 June 2022 - 05:01 PM

I would say that over 90% of my non H-alpha shots are under 10 minutes total exposure. 


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#14 roelb

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Posted 25 June 2022 - 05:13 PM

look here: https://www.cloudyni...-6-se-asi290mm/

and here (most are less then 600 s): https://www.cloudyni...r/225201-roelb/


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#15 Leafus

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Posted 25 June 2022 - 07:56 PM

Hi roelb: you certainly got in a lot on the dark sky night. Nice shots of galaxies. Being able to see a lot of targets is a another big benefit of short exposure EAA
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#16 chilldaddy

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Posted 26 June 2022 - 10:00 PM

Here are a couple examples with different scopes and different skies.

 

Greg

 

M16

76x_8.0s_608s, G 350

AT60ED, F/6

EVO mount on wedge

ASI533MC, L-eXtreme dual band filter

Bortle 8

 

M16_76x_8.0s_608s__WithDisplayStretch.jpg

 

M51

75x_8.0s_600s

C8, F/6.3

EVO mount on wedge

ASI533MC, UV/IR cut

Bortle 2

 

M51_75x_8.0s_600s__WithDisplayStretch.jpg


Edited by chilldaddy, 27 June 2022 - 07:57 PM.

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#17 Leafus

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Posted 27 June 2022 - 05:04 AM

Here are a couple examples with different scopes and different skies.

 

Greg

 

 

Chilldaddy: I'm amazed you can get such a great image of M16 under Bortle 8. How much impact does the L-Extreme filter have? I have seen a lot of people use it for nebula. I'm wondering whether I need to invest or could get by without it.

 

Have you tried the L-enhance? They are a lot of money (for a filter). 

 

Should say I'm in Bortle 4/5.

 

The image of M51 is fantastic. 


Edited by Leafus, 27 June 2022 - 05:08 AM.


#18 GaryShaw

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Posted 27 June 2022 - 08:32 AM

Gary, your link leads to MY albums and images, which is empty.  Can you change the link to go to yours?

HI Jim 
I’m not sure what I can change. Whenever I try the link it goes to the Gallery as expected. The OP is getting good feedback on their topic from all the other nice images from the CN community. 

Gary



#19 Leafus

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Posted 27 June 2022 - 01:15 PM

Hi Gary, yes it’s been a great response. The problem might be you need to make your gallery viewable to everyone. Might be set to just private now.

#20 alder1

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Posted 27 June 2022 - 02:43 PM

Here’s a ten minute exposure of M104 taken with my eQuinox. (And reduced for posting) I don’t know that it’s my favorite image, but the rules of this forum prevent my showing anything that’s undergone post production, a usual part of my process. Anyhow, I live under Bortle 3 skies and the conditions (transparency and seeing) were fair. I’m working on the Herschel 400 right now and I find that for record keeping purposes, a five minute exposure is just fine for most objects. 

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#21 nic35

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Posted 27 June 2022 - 03:13 PM

HI Jim 
I’m not sure what I can change. Whenever I try the link it goes to the Gallery as expected. The OP is getting good feedback on their topic from all the other nice images from the CN community. 

Gary

Gary, the link you provided goes to the "users" gallery, not to yours.  It sends me to my gallery.  If you go to your gallery and copy  the url - which should look like this  https://www.cloudyni...er/31278-nic35/

 

then all should be good

 

j



#22 Tfer

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Posted 27 June 2022 - 08:04 PM

10 minutes?

 

Here’s 8 seconds.

Attached Thumbnails

  • 92F10E3E-82E6-4F04-B055-B8F6B17D26B8.jpeg

Edited by Tfer, 27 June 2022 - 08:05 PM.

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#23 chilldaddy

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Posted 27 June 2022 - 08:26 PM

Chilldaddy: I'm amazed you can get such a great image of M16 under Bortle 8. How much impact does the L-Extreme filter have? I have seen a lot of people use it for nebula. I'm wondering whether I need to invest or could get by without it.

 

Have you tried the L-enhance? They are a lot of money (for a filter). 

 

Should say I'm in Bortle 4/5.

 

The image of M51 is fantastic. 

Thanks Leafus!

 

The L-eXtreme makes an enormous difference.  I found this image taken with the same gear from the same location but no filter.

 

M16

40x_15.0s_600s

 

M16__40x_15.0s_600s.jpg

 

At $240.00, it was a little pricey for me, but has been well worth it.  I simply couldn't pull out anywhere near as much Ha from my location without it.  With a slightly narrower band pass, it was seen as an improvement over the L-eNhance.  They are both very good though, from what I understand.

 

Greg


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#24 Tfer

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Posted 27 June 2022 - 08:31 PM

Here’s one minute on the Eskimo Nebula.  Crop to show beginnings of detail.

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  • 6A663881-5D0F-4E69-8436-128D192D909A.jpeg

Edited by Tfer, 27 June 2022 - 08:32 PM.

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#25 Leafus

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Posted 28 June 2022 - 05:53 AM

Tfer that Eskimo nebula looks great and detail is impressive. I’ll check that out soon as it’s back up in the dark at my location

Chilldaddy: Amazing how much detail comes out with that filter. I’m on an alt-az mount and want to keep it so my worry would be if I could get enough exposure time for the narrowband.


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