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The PHOTOGRAPHY thread

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Description: An album of member's photo's
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BoogieMonster
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« Reply #15 on: July 29, 2016, 10:03:38 AM »

Jewelbox?
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brianvds
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« Reply #16 on: July 29, 2016, 10:55:32 AM »

Globular cluster of some sort; Omega centauri perhaps?
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Rigil Kent
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« Reply #17 on: July 29, 2016, 11:45:51 AM »



Ω
« Last Edit: July 29, 2016, 12:02:02 PM by Rigil Kent » Logged
st0nes
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mark.widdicombe1
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« Reply #18 on: August 01, 2016, 13:49:25 PM »

Two virtual jellybeans to the first person who can identify this object currently gracing our southern skies in the early evenings. Smiley
Small Magellanic Cloud?
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BoogieMonster
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« Reply #19 on: August 01, 2016, 15:34:47 PM »



The Kidney Nebula?

Edit: Note my tongue firmly in my cheek.
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Tweefo
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« Reply #20 on: August 02, 2016, 11:51:54 AM »

Ok, I 've bought the cheap web-cam (no software) to mount on my scope, but what program do I use to get images? I will use AVI Stack 2 to process it after, but to get it? Help Rigil?
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Rigil Kent
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« Reply #21 on: August 06, 2016, 11:19:36 AM »

Hi Tweefo. Sorry I'm only replying now ... spent 5 days hiking in that pristine bit of coastal forest between the Storms River mouth and Nature's Valley.

If you still have this problem with the webcam, and its driver installed ok, I suggest just download either Yawcam at http://www.yawcam.com/ or Virtualdub at http://www.virtualdub.org/download.html ... the latter can convert your video to a stream of jpegs which could facilitate processing later.

Rigil
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Rigil Kent
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« Reply #22 on: August 06, 2016, 11:24:46 AM »

Two virtual jellybeans to the first person who can identify this object currently gracing our southern skies in the early evenings. Smiley
Small Magellanic Cloud?

Brianvds got it right ... it's Omega Centauri, the largest globular cluster associated with the Milky Way. Two virtual jelly beans were duly awarded. Wink
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brianvds
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« Reply #23 on: August 06, 2016, 11:44:37 AM »

Brianvds got it right ... it's Omega Centauri, the largest globular cluster associated with the Milky Way. Two virtual jelly beans were duly awarded. Wink

I can virtually taste them. :-)
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Tweefo
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« Reply #24 on: August 07, 2016, 11:42:29 AM »

Hi Tweefo. Sorry I'm only replying now ... spent 5 days hiking in that pristine bit of coastal forest between the Storms River mouth and Nature's Valley.

If you still have this problem with the webcam, and its driver installed ok, I suggest just download either Yawcam at http://www.yawcam.com/ or Virtualdub at http://www.virtualdub.org/download.html ... the latter can convert your video to a stream of jpegs which could facilitate processing later.

Rigil

Thanks, Rigel. Looks like Yawcam can do the job, will try it out tonight. How was the walk?
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Tweefo
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« Reply #25 on: August 07, 2016, 19:34:21 PM »

Ok. What am I doing wrong? The moon with webcam. I've tried without webcam lens, without scope eyepiese, with and without 2X Barlow lens but the best result (this photo)  was with webcam lens on and through 28mm eyepiece. 300 Pictures stacked with AVI.  Tongue
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brianvds
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« Reply #26 on: August 08, 2016, 06:57:51 AM »

I am no expert, but eh picture looks badly overexposed. How long was the exposure?
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Rigil Kent
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« Reply #27 on: August 08, 2016, 07:54:05 AM »

Agree. Either disenable automatic exposure via the software, or use an apperture stop and some filters. But the best would be to get rid of some contrast by focussing on only the lit up part of the moon by boosting the magnification a bit untill the bright moon surface covers or mostly covers the sensor (cmos chip) of the webcam. Since the chip is tiny (maybe equivalent to a 4mm ocular) you should be able to achieve that by removing the camera lens and uv filter assembly and let the image from your telescope's primary mirror/lens fall directly on the chip. That way the webcam needn't try and cope with the contrast difference created by a pitch black background, but instead only have to work in greys.

Also, shooting the moon in daylight may help for the same reason, provided the atmosphere is not too turbulent.

Experimentation is half the fun. Cool
« Last Edit: August 08, 2016, 08:37:48 AM by Rigil Kent » Logged
brianvds
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« Reply #28 on: August 08, 2016, 10:40:02 AM »

Also, shooting the moon in daylight may help for the same reason, provided the atmosphere is not too turbulent.

At least with binoculars or small telescope, I have found that the very best time to view the moon is at dawn, just before the sun rises. At those times the details become wonderfully crisp and clear. Perhaps the same will be true for photography.
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Tweefo
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« Reply #29 on: August 08, 2016, 15:14:13 PM »

Agree. Either disenable automatic exposure via the software, or use an apperture stop and some filters. But the best would be to get rid of some contrast by focussing on only the lit up part of the moon by boosting the magnification a bit untill the bright moon surface covers or mostly covers the sensor (cmos chip) of the webcam. Since the chip is tiny (maybe equivalent to a 4mm ocular) you should be able to achieve that by removing the camera lens and uv filter assembly and let the image from your telescope's primary mirror/lens fall directly on the chip. That way the webcam needn't try and cope with the contrast difference created by a pitch black background, but instead only have to work in greys.

Also, shooting the moon in daylight may help for the same reason, provided the atmosphere is not too turbulent.

Experimentation is half the fun. Cool
Thanks. Cloudy here now and probably tonight. I will try again tomorrow night.
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