I can maybe get one exposure of a half hour before this guy is in the trees at my house this is using the Baader 7nm Ha filter in combination with 3nm CS ...
I'm going to add a focuser to the back of my SCT. (12" LX200R OTA). I'll be locking the mirror in a specific location to get enough in and out focus as...
how is this different from the situation I had with my C14? it isn't I used an outboard crayford type focuser on the C14 (optec tcf-s) and never used the temp...
Btw.. it occurs to me that other "closed tube multiple element" systems have a similar problem. E.g. consider a newtonian -- the distance between the primary...
the mirrors shrink too and that makes the situation somewhat more complicated a slow system like my classical cass or a c14 is only minimally affected: the...
... complicated I suspect the shrinkage of the aluminum outpaces the mirror glass a lot, so the mirror shrinkage could be considered negligible. ... the...
the pdf will have lateral loading issues potentially the Stinger has CF and a LOT of it separating the mirrors. I see a small amount of thermal shift, not much...
Hi Jeff, I suspect your new setup will be much better than the old. I believe the SCT optical system has an optimal primary/second distance that minimizes ...
nice start Paul that's a great one to shoot in halpha too... ... From: Paul Sterngold To: Norcal AI Sent: Thursday, April 12, 2007 9:13 PM Subject: [norcal_ai]...
In a message dated 4/13/2007 10:47:31 AM Pacific Standard Time, psterngold@... writes: Who is attending GSSP? Imaging or observing? I am not sure if I...
this is 10 x 10 minutes binned 2x2 (0.84 arc-sec/pixel) the seeing was pretty bad, about 4.8 to 5.2 arc-sec, so that's why I binned. I was surprised that it...
Paul Alsing posted this to TAC. I was particularly interested in the write-up about Figueroa Mountain, which would be a great site for an imaging party. ... ...
I have an image of the Eagle Neb in Ha from my backyard (mostly), 26x5m frames. Unfortunately, I'm having problems accessing my website by ftp or Plesk, so at ...
why not post it here too Paul? some of us have no interest in TAC-Imaging like me and wouldn't go there on a dare but would still like to see your image ... ...
Duh! I forgot that this list is on Yahoo groups. I thought it was a SEDS-based list-server. The original and updated images are now posted in our group's files...
H alpha narrow band surveys Richard, I think there have been a couple of fairly complete narrow band surveys done with CCDs and short focal lenght cameras....
Does anyone have information on sites (real and Internet) that have data collected using the SBIG Polaris seeing monitor? I have seen some sites in Colorado...
that's interesting but how does that relate to my image and map I made using three different emission line filters? I am genuinely puzzled as to the connection...
Steve Nelson notes: I think there have been a couple of fairly complete narrow band surveys done with CCDs and short focal lenght cameras. The second was done...
Given the high price of the Optec Pyxis rotator, has anyone considered using the Meade de-rotator as a rotator? I don't know much about it. I don't know if the...
it seems that it would work in principle but I think the issue will likely be the speed at which you can rotate it. meade is not known for overdesigning...
I've actually given the meade rotator a lot of thought of late. I'm in the process of building a dob, and will probably put a field rotator on it in V2 (as...
the speed at which a derotator operates is slow: it is tied to the RA speed: it might even be equal to it for all I know. for a rotator to adjust the angle of...
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