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Old 08-05-2024, 01:35 AM
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astronobob (Bob)
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2nd Pons-Brook 6th May

Evening Astro-liano's.

A more favourable set of subs from the evening, actually a shame I didn't think to shoot in Raw

Anyway, these 11 subs were 15 secs @ ISO 3200, Star Tracker, 135mm F2 on the 6DII,, 100% Pixel Crop...

Ive pushed the contrast locally around the tail which has exposed better some filament or streaming structure, happy with that considering only a 135mm F/L.

It will be interesting as this comet climbs into slightly darker sky but a conflicting waxing crescent moon joins the party,, Ooops, getting ahead too much, need to shoot the clouds 1st
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Old 08-05-2024, 07:11 AM
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As like the first Bob, another excellent image, well done.

Leon
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Old 08-05-2024, 08:24 AM
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Nice work, Bob!
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Old 08-05-2024, 09:36 AM
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Another wonderful shot. Wow!!
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Old 08-05-2024, 01:59 PM
John W (John Wilkinson)
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A really nice image of the comet Bob - well done.

Regards, John W.
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Old 10-05-2024, 12:44 AM
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Thanx once again Leon, David, also Pete and Jon for kind comments.
I wonder how it will change while its been rather overcast and cloud persisting for a while yet,, time will tell,,,
HavaGoodN
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Old 10-05-2024, 09:22 AM
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That's impressive considering the conditions and the focal length.

How do you "freeze" the stars? I always get horrible results with DSS comet+stars stacking.
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Old 10-05-2024, 10:47 AM
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Quote:
Originally Posted by Stefan Buda View Post
That's impressive considering the conditions and the focal length.

How do you "freeze" the stars? I always get horrible results with DSS comet+stars stacking.
@Stefan, I think it may have something to do with how DSS is stacking (possibly erroneously?). Try just stacking normally instead of using the comet options. Why do I suggest that? .... Because the difference in perceived angular velocity, albeit watching the stars v Comet track in STELLARIUM, is insignificantly different / probably the same ???, as viewed on screen in Stellarium. I'd also try Sequator for the stacking.

@Bob, love your image, especially @135mm !
...Buonissimo Astro-liano

Best
JA

Last edited by JA; 10-05-2024 at 11:01 AM.
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Old 10-05-2024, 12:11 PM
Stefan Buda
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Quote:
Originally Posted by JA View Post
@Stefan, I think it may have something to do with how DSS is stacking (possibly erroneously?). Try just stacking normally instead of using the comet options. Why do I suggest that? .... Because the difference in perceived angular velocity, albeit watching the stars v Comet track in STELLARIUM, is insignificantly different / probably the same ???, as viewed on screen in Stellarium. I'd also try Sequator for the stacking.

Best
JA
Stacking normally only works for short time-span as the comet moves significantly from one sub to another, at least in my case at 450mm focal length. In this case, at 135 focal length and several minutes time span, normal staking is probably ok. I was just wondering if any special trick was used.
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Old 10-05-2024, 08:06 PM
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Well done Bob considering all the clouds.Was down in Tassie hoping for an Aurora but the clouds were down there last week as well.
Cheers Derek
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Old 10-05-2024, 10:42 PM
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Quote:
Originally Posted by Stefan Buda View Post
That's impressive considering the conditions and the focal length.

How do you "freeze" the stars? I always get horrible results with DSS comet+stars stacking.
Quote:
Originally Posted by JA View Post
@Stefan, I think it may have something to do with how DSS is stacking (possibly erroneously?). Try just stacking normally instead of using the comet options. Why do I suggest that? .... Because the difference in perceived angular velocity, albeit watching the stars v Comet track in STELLARIUM, is insignificantly different / probably the same ???, as viewed on screen in Stellarium. I'd also try Sequator for the stacking.

@Bob, love your image, especially @135mm !
...Buonissimo Astro-liano

Best
JA
Quote:
Originally Posted by Stefan Buda View Post
Stacking normally only works for short time-span as the comet moves significantly from one sub to another, at least in my case at 450mm focal length. In this case, at 135 focal length and several minutes time span, normal staking is probably ok. I was just wondering if any special trick was used.
Cheers Stefan and JA, I have not stacked images for yrs ,,, my PC died months ago and using a Laptop and only just downloaded DSS on the night of capturing this comet,, I remember back those Yrs ago stacking in comet-mode was sometimes a bit 'Hit and Miss, maybe focal length and/or comet movement.
That said I just loaded the images straight in to just see what it would produce, and DSS spat out exactly what is you see with Stars and comet aligned.

Last edited by astronobob; 15-05-2024 at 12:13 AM. Reason: simplify
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