I am finally getting done something I’ve been meaning to do for some time. One is to look into this business about F/number and whether or not it has an...
11340
andrew950222
Jul 1, 2012 9:01 am
Hi Richard - Very good work well explained. If my understanding is correct you have verified what one would have expected from theory, which is in my view a...
11341
dvjbaja
Jul 1, 2012 9:05 am
..... I had just characterized and a Pentax 67 400mm f/4 EDIF lens and a standard resolution test target. I took images of varying exposures at F/4, F/8, F/16...
11342
outters nicolas
golfdemornex
Jul 1, 2012 9:05 am
Hello Floyd, Yes for all, you can exchange the filter wheel between old CFW-7 and new CWF-2-7 and also the distance to the chip is exactly the same. I have an...
11343
mik.schuster
Jul 1, 2012 9:10 am
Richard, your PTCs seem to show that dark current noise per pixel stays the same. Am I reading this correctly? Mile...
11344
John Nassr
jnassr2010
Jul 1, 2012 9:10 am
Richard, Your "Big Enchilada" is masterfully executed and sheds clear light on related topics that have often been grist for heated squabbles in the past. Your...
11345
dannysperry
Jul 1, 2012 9:10 am
Thanks, Wolfgang!...
11346
Richard Crisp
rdcrisp
Jul 1, 2012 11:00 am
Thanks John. It was fun putting it together and a lot of work of course…. But a labor of love. I added quite a bit relating to bright skies and show how that...
11347
Richard Crisp
rdcrisp
Jul 1, 2012 11:10 am
No There is no time dimension…. It just shows the relationship between signal level and noise… it says nothing about how long it takes to get to a...
11348
John Nassr
jnassr2010
Jul 1, 2012 4:35 pm
Richard, The later version is even more relevant with everything being tied in to actual astroimaging and light pollution. Your meticulous labor of love is...
11349
Richard Crisp
rdcrisp
Jul 1, 2012 9:13 pm
From: FLI_Imaging_Systems@yahoogroups.com [mailto:FLI_Imaging_Systems@yahoogroups.com] On Behalf Of andrew950222 Sent: Saturday, June 30, 2012 3:34 AM To:...
11350
bakersfieldbiker
bakersfieldb...
Jul 1, 2012 9:13 pm
Thank you Nicolas, that answers my questions! I have a Homeyer custom OAG coming that was made for the CFW-7 and the IMG-6303 and was hoping it would work with...
11351
Richard Crisp
rdcrisp
Jul 1, 2012 9:15 pm
John It really doesn’t matter how you reach the F/#, it is the ratio of the aperture to the focal length…. A large aperture (12” f/3) has the same light...
11352
Richard Crisp
rdcrisp
Jul 1, 2012 9:15 pm
The classic PTC or DTC plots noise against signal level. For noise components caused by dark current there are two basic types: dark fixed pattern noise and...
11353
dvjbaja
Jul 4, 2012 5:09 am
... http://img221.imageshack.us/img221/9969/rcw114.jpg A faint and obscure SNR: RCW 114 4 segment mosaic 7.5 hours each segment 5nm Ha FSQ Proline16803 ...
11354
Richard Crisp
rdcrisp
Jul 4, 2012 7:36 am
I sure like that one John…. Very nice SNR… I can sure appreciate the importance of dark skies and low read noise after going through that S/N analysis… ...
11355
dvjbaja
Jul 5, 2012 5:13 am
Thank you Richard! The site in Coonabarabran can be quite excellent. Marco Lorenzi is a few klicks up the road who is getting outstanding color reslts as...
11356
Jose M. Bellas
bustedlx
Jul 5, 2012 5:13 am
John, Wow, thanks for sharing. I really like this. Clear skies, Jose M. Bellas jose@... 305-733-0055...
11357
rdcrisp@...
rdcrisp
Jul 6, 2012 5:13 am
this is the main reason why it is so hard to find decent sensors for astro use for a good price.... ...
11358
Sam Barziza
b52ceti
Jul 6, 2012 5:13 am
So are CCDs going the way of the dinosaur ? To be replaced with charge domain CMOS TD if possible ? Sam From: ccd-imaging-technology@yahoogroups.com ...
11359
rdcrisp@...
rdcrisp
Jul 6, 2012 5:13 am
I didn’t say that and neither did the author... but the commercial semiconductor industry usually focuses on volume opportunities: be it unit volume or $$$...
11360
Wolfgang Promper
ic2779
Jul 6, 2012 6:27 am
Hello John It looks great. It is something only you can do, you got the touch for Ha. Wolfgang From: dvjbaja Sent: Wednesday, July 04, 2012 5:09 AM To:...
11361
rdcrisp@...
rdcrisp
Jul 7, 2012 8:43 pm
very nice video. thanks to Jim Janesick for sending me the link last night http://bit.ly/edlemail What an amazing set of challenges and such a nice engineering...
11362
rdcrisp@...
rdcrisp
Jul 8, 2012 11:00 am
approx 184 Megapixels full rez: 23096 x 7981 pixels (width x height) http://photojournal.jpl.nasa.gov/jpeg/PIA15689.jpg...
11363
Sam Barziza
b52ceti
Jul 8, 2012 9:47 pm
Can't view image. Can you repost the link ? Sam From: FLI_Imaging_Systems@yahoogroups.com [mailto:FLI_Imaging_Systems@yahoogroups.com] On Behalf Of ...
11364
drprovi57
Jul 10, 2012 1:16 pm
Hi Richard, I clearly if these pull this off - perhaps Star Wars may have actually worked :-) Many of is in the autonomous robotic space are watching this very...
11365
dvjbaja
Jul 16, 2012 9:38 am
Here is a new view of an extended portion of Gum 12 in Antila, taken some months ago from Coonabarabran. It's a 1 x 2 mosaic. This object is huge as it would...
11366
echesak@...
echesak...
Jul 16, 2012 1:35 pm
Awesome ! Thanks for sharing, Eric...
11367
Tom Davis
tvdavisid
Jul 17, 2012 5:29 am
Great as always, jg! -Tom...
11368
Paul Beskeen
coldwetandcl...
Jul 17, 2012 5:29 am
Beautiful! - makes me want to move south :) - the whole vela complex looks full of fascinating objects. Paul. --...
