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Sculptor Galaxy (NGC 253)

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Posts Made By: Oliver Pettenpaul

June 24, 2005 05:14 PM Forum: CCD Imaging and Processing/Solar System

FPS VS. QUALITY

Posted By Oliver Pettenpaul
Hi Ido,

I'm not too familiar with the SAC7B but I suppose it's a USB1.X long exposure ToUcam family device ? If so, shooting at 25fps lowers image quality noticably. USB1.X has a maximum bandwith of 12MBit/s, transfering 640*480*8Bit*3Pixels at 25fps would in theory require 175.78 MBit/s. To achieve the framerate over the slow bus a lossy online compression is performed by cam and driver - the higher the framerate the worse image quality. Personally I don't use my ToUcams faster than 10fps.
This subject is the reason why todays planetary imagers long for cameras with USB2 or FireWire interfaces with 400MBit/s or more allowing much higher framerates without quality degradation by compression.

Best regards & clear skies,
Oliver

June 27, 2005 01:43 PM Forum: CCD Imaging and Processing/Solar System

Lyra in the clouds

Posted By Oliver Pettenpaul
Hi Mike,

what a fascinating view! Looks like the skies opened up only to show Lyra. Great!

Cheers,
Oliver

July 8, 2005 09:47 AM Forum: CCD Imaging and Processing/Solar System

Agrippa and Godin

Posted By Oliver Pettenpaul
Hi Wes,

I'm always amazed by the natural and 3-dimensional look of your lunar images in conjunction with the enormous level of detail 8O smile grin shocked Excellent work!

Cheers & clear skies,
Oliver

July 8, 2005 07:06 PM Forum: CCD Imaging and Processing/Solar System

New Philips USB2 webcam SPC-900NC

Posted By Oliver Pettenpaul
First offers in the webshops demand about 80EUR in europe but the cams don't seem to be available yet. Looks like Philips replaces the complete ToUcam range with USB2 devices:

spc900nc - VGA CCD, USB2
spc700nc - VGA CMOS, USB2
spc600nc - VGA CMOS, USB2
spc300nc - QVGA CMOS, USB2
spc200nc - CIF CMOS, USB2

As always only the CCD device should be interesting for us.

Cheers & clear skies,
Oliver

July 10, 2005 07:53 PM Forum: CCD Imaging and Processing/Solar System

Mars July 9th 2005

Posted By Oliver Pettenpaul
Hi Wes,

phew, what a result for a 10arcsec mars grin I would have been more than happy to obtain such a result during the 2003 opposition. Fascinating what todays top-notch equipment can do in the right hands. Excellent !

Cheers & clear skies!
OLiver

July 10, 2005 08:02 PM Forum: CCD Imaging and Processing/Solar System

Mars!

Posted By Oliver Pettenpaul
Hi Jim,

a phantastic result, congratulations. If this is possible at 10arsec, what can we expect for the opposition ? 8O grin

Cheers & Clear skies,
Oliver

July 15, 2005 07:47 PM Forum: CCD Imaging and Processing/Solar System

Barbados Mission Webpage

Posted By Oliver Pettenpaul
Hi Damian,

simply stunning 8O 8O 8O Thanks for sharing!

Best regards & clear skies,
Oliver

July 24, 2005 09:14 AM Forum: CCD Imaging and Processing/Solar System

DMK 31BF03 1024x768 arrived

Posted By Oliver Pettenpaul
Hi Dodi,

very interesting. Have you been able to compare the pixel sensitivity of the 31BF03/ICX204AL with that of your 21BF04/ICX098BL ? If sensitivity is good and real ROI in the cam with higher framerates is implemented this should be a real killer cam 8)

Best regards & clear skies,
Oliver

August 15, 2005 11:15 AM Forum: CCD Imaging and Processing/Solar System

Beauty and the beast

Posted By Oliver Pettenpaul
Hi Paul,

phew, impressive new toy 8) One of my dream setups...
Have a lot of fun with the Mewlon and as much clear skies as possible!

Clear skies & best wishes,
Oliver

August 20, 2005 06:43 PM Forum: CCD Imaging and Processing/Solar System

Interesting from Logitech...

Posted By Oliver Pettenpaul
Hi all,

well, no info on the sensor used (CCD, CMOS, type)?

Only this information

• Video capture: Up to 640x480 pixels
• Still image capture: True 1280x960 pixels
• Frame rate: Up to 30 frames per second

Best wishes & clear skies,
Oliver



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