Splendid, Ray! So much nebulosity. Stretching really brought up some faint stuff to the upper right, and right of the triangle. Killer. Jim Livermore ... ...
I uploaded an excel file into the files section. It is called Field_of_view.xls I don't remember how I came about it, but it appears to be from Richard Crisp....
I also created an Excel spreadsheet using these formulae: Resolution in arc-secs/pixel = (Pixel size in microns / Focal length in mm ) * 206 Field of view in...
One of the well informed on this forum should comment on this. There is a magic (optimum) number for the pixel scale. I think it is in the 2 to 3 arc ...
Plate scale, as used on Richard Crisp's spreadsheet, is the same as what I call resolution. There is no magic number; however, there are certain parameters...
Jay, What I do in PEMPro is stop the mount tracking and expose an image for X seconds. When the image is done I have the user click the start and end of a few ...
You can also download the excellent program from Ron Wodaski. http://www.newastro.com/newastro/book_new/camera_app.asp Not only can you get all sorts of...
Yup, PEMPro does all sort of useful things. My calculated resolution was 3.09 arc-secs/pixel with a Vixen ED80sf, but PEMPro determined the actual resolution...
Hi Paul, Yes, each manufacturers' specification for a scope's focal length is very rarely exactly what they say it should be. So until you have the focal...
Paul had a good explanation there. It really is important for a bunch of reasons to know your plate scale and FOV. knowing your plate scale (arcsec/pixel),...
Hi, I've asked this (twice now) on the Tak group, but didn't get a response. Maybe "a local" knows the answer. Is the Shoestring Astronomy adapter, model...
Hi Jim, I have no experience with Tak. mounts but I do know the pin out of the GPUSB is reversed from the pin out on SBIG cameras so at least you would need to...
My understanding, such as it is... There are several things that must be "compatible" for this to work. First off, the connector on the GPUSB must match the...
Hi folks, It's been a while. Washington was good for my pocketbook, but lousy for astronomy. I'm very happy to be back in Monterey again, and looking to get...
Hey Bill, good to hear from you! It's been a very long time. Lefevre and I are in SoCal now. I'll be at Calstar so I hope to see you there in October. My...
Despite persistant winds here in the Livermore valley, I got a couple respectable shots of the Pelican and the region of Cygnus near Sadr. Shot with a...
Hi Jim. Great job. Really nicely balanced images and I'd certainly agree with your comment about the fine detail being captured in the Cygnus. Darren. ... ...
Hi Bill, My experience with the current Titan (I believe it is the Titan 50 and not the Titan HGM 200) has been very positive. I'm still shaking out the ...
Is Yankee Robotics a legitimate, solvent company? I ask because on a lark, I bought a secondhand Nugget autoguider. The specs were attractive but then I heard...
Hi, I didn't catch your name, but welcome back to the group. I live in the Corral De Tierra area off Highway 68 and image with a mono H-9. There was an...
I worked on focusing over the weekend. It looks a little better but to my untrained eye I'm not sure. Focus was done using tape to create diffraction spikes...
Jay Critchfield
js3mc@...
Aug 7, 2007 5:23 am
12810
Both are very nice images Jim, Keep them coming! Iver...
Hi Paul, I had read a few posts on Ron Wodaski's group from people complaining about the Nugget guider. Maybe you should try to sell it on Amart again and pick...
Hi Jay, your focus looks better. I don't know what IP software you are using but if it has DDP you might want to stretch using that. As for your last two...
Hi Iver, I've been using Iris and CS2 so far. I just received Image Plus and I need to spend some time getting started with that. Not that I really understand ...
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