Although I have tried rotating the camera and moving the target around on the chip, I simply can not find a bright enough guide star when shooting Ha from my...
many people use them with success Paul. i'd be careful to use it only on a short focal length system like an FSQ or faster though I forgot its focal length but...
Thanks, Richard. I'm currently shooting through a Vixen ED80sf 80/600. With the ST8, res is 3.1 arc-secs/pixel. So based on your rule, I want to guide no lower...
Hi All, My TOA-150 scope arrived back from Texas Nautical from its re-collimation. To cut a long story short it's only about 50% fixed and is on its way back...
nice image! the problem with the background level difference is likely due to the "calibration" used for the jpeg conversion. you can ease up the brightness a...
my rule is only a suggested rule of thumb sort of gut feel based on having spent a night or two under the stars :-) I am confident there's some latitude there ...
Last night I switched lenses to the 300mm f/4 pentax smc 6x7 lens. this gives me about 6.19 arc-sec/pixel so I get a pretty big FOV of 5.28 x 3.52 degrees. ...
Cool image, Richard. Lots and lots of detail in there. Paul Sterngold ... ____________________________________________________________________________________ ...
... Wow, that is a huge bummer. I don't understand why they would send it back to you if it wasn't 100%? I've heard several "interesting" stories about similar...
Hi Paul, Thanks for the comments. I can see why people get addicted to narrowband imaging - not a single gradient to remove, no moon or streetlights to worry...
Thanks for the tip. I think that's why some of my backgrounds are too black - everything is OK until I save the JPEG. Now I know the problem I can work out how...
Suggestion for a fruitful discussion: please describe your guiding setup including hw and sw, attachment methods, sw parameter settings, etc. What do you find...
this is a total of 5 hours; 5x20 minutes for each filter (ha, [OIII], [SII]) this was taken using the pentax 300mm f/4 medium format lens (6x7) on the IMG6303E...
I guide different systems differently 18" cassegrain: without focal reducer: (f/12.6, F=5760mm), I use the ST7/AO7 with the Dichroic beam splitter for guiding...
That's a really nice image I don't think I've seen a veil in such a wide FOV before. _____ From: norcal_ai@yahoogroups.com [mailto:norcal_ai@yahoogroups.com]...
Very nice. I've been meaning to try camera lenses - maybe as soon as I get a working scope :( I was surprised by the differing position of the wavefronts for...
the seeing and clear skies have been great this past couple of nights. Last night didn't stay clear all night but was pretty good until a bit after midnight....
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man if i could only get it for that starting price Paul! ... From: Paul Sterngold To: Norcal AI Sent: Friday, July 06, 2007 7:18 PM Subject: [norcal_ai] DIY......
i am not sure what it is worth, maybe $15K or a bit more? ... From: Paul Sterngold To: norcal_ai@yahoogroups.com Sent: Friday, July 06, 2007 7:26 PM Subject:...
sorry I meant $150K ... From: Paul Sterngold To: norcal_ai@yahoogroups.com Sent: Friday, July 06, 2007 7:26 PM Subject: Re: [norcal_ai] DIY... What do you...
here's one for sale http://www.bluestarmachinery.com/buy/detail.cfm?inventoryid=60849 ... From: Paul Sterngold To: norcal_ai@yahoogroups.com Sent: Friday, July...
Here are a couple of images from Friday night July 6th. These were taken up at Fremont Peak. It was a great night, the fog came in during the evening and...
fog maps Rob Hawley of the SJAA and I were talking Friday night about how to figure if fog was covering an area. He has been sort of a 'weather man' for our...
this is adding sulfur and oxygen to the previously-released halpha image of M27 taken a few days ago. last night the marine layer finally cooperated long...
Hi All, Just before sunrise on the last night of GSSP I used the last hour to take an image of Pickering's Triangular Wisp - a small section of nebulousity...
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