(meteorobs) Geminids from Greece

stange stange34 at sbcglobal.net
Mon Dec 15 13:48:30 EST 2008


Hello J.D.

Sounds like you purchased a JBD CB-23803(S?) 1/3" CCD B/W camera with 0.003 
Lux rating. Using the camera with the zoom lens will confine the field of 
view(FOV) into a rectangular shape. Lowering the zoom to 3.0 will give the 
widest FOV but still rectangular because of the CCD substrate shape.

An "ALL-SKY" option for the future would be to use a highly polished "moon" 
hub-cap from a car, or better yet, a hemispherical mirror dome(the bigger 
the better), with the camera mounted downward over it. Similar construciton 
to what I have illustrated at:
http://www.geocities.com/stange34@sbcglobal.net/IR_Experiment.html or the 
earlier design used by Chris at Cloudbait Observatory.

If you do go in this "ALL-SKY" mirror direction, the height of the camera 
over the mirror for imaging the entire perimeter of the mirror, will be 
determined by the amount of zoom.

The higher the magnification, the higher will the camera need to be over the 
mirror to get the entire image of the mirror circle which contains a 360 
degree all-sky view.

Most folks try to use around a 4mm adjustment which will keep the camera 
lower but at the expense of slightly larger central obstruction which is the 
image of the camera in the mirror itself.

Using inexpensive ($40 U.S.) programs like Handyavi will give you 
satisfaction in captures.

Try the program for free at their website download to see if your composite 
capture card can work with that program. You may have to experiment a little 
with comuter settings and Handyavi settings. Generally if Windows XP can see 
the mirror image, so will Handyavi.

Good Luck, YCSentinel.

----- Original Message ----- 
From: "jackob strikis" <jdstrikis at yahoo.com>
To: "Global Meteor Observing Forum" <meteorobs at meteorobs.org>
Sent: 2008/12/15 08:51
Subject: (meteorobs) Geminids from Greece


> Hello all.
>
> Thanks for the previus advise on Meteor Observing Setup and I aprisiate it 
> a lot... I bought a GKB CCD B&W Camera (CB-803) with a zoom lens 
> (3.0-8.0mm) and now I am waiting for the card for my PC to be conected.... 
> Until then I still use the 2 DSLR... One pointed near polaris & the other 
> pointed left of Orion... After a few days of clouds today I will start 
> again the shootting...
>
> Clear Sky & Lot of fireworks....
> J.D.Strikis
>
>
>
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