hello bill,

> Hmmm... are you running Guide in German? If so, ....

you are right, i am using the german version and so i have to edit the file CCDS.NAD.
now, it works fine.

reson for my changes:
first, i set up the focal length to 2100 mm and the imager chip fits exactly the frame
guide shows (2000 mm is the focal length the manufacturer say).
1)
i am using ccdsoft and i took pictures of the guider chip and imager chip at one time.
with this i found out, that the distance between imager and guider is to small.

2)
ccdsoft shows the image of guider chip with a ratio not eqals to 1 (is shows it with 5 x
4.3)
this assumes me that i have to widen the guider width, too.
but i will have to check this again with a picture more than only 2 stars.

i made no alternations to the camera.

do other user of this camera type have similar problems with the DISTANCE of guider and
imager chip???

christian

----- Original Message -----
From: "Bill J Gray" <pluto@...>
To: <guide-user@yahoogroups.com>
Sent: Sunday, May 18, 2003 2:22 AM
Subject: [guide-user] Re: Missing CCD entry


> Hi Christian,
>
> (Note to those wondering what the heck we're discussing: as
> described at the end of the file 'ccds.nam', it's possible to add
> your own CCD chip specs to Guide, complete with the size and
> positioning of one or two guiding chips, as used in the SBIG
> and MegaTek cameras.)
>
> Hmmm... are you running Guide in German? If so, you need
> to edit CCDS.NAD, the German-language version of the CCD
> list. Seems the most likely culprit. (I've just added a paragraph
> to 'ccds.nam' to mention the versions for other languages.)
>
> On another matter... I'm curious as to why you're altering the
> line in this manner? The default height/width ratios are based
> on the main chip having 7.4-micron pixels, 1200x1600, with
> the guiding chip being a TC-211 with 165x192 pixels, 13.75 by
> 16 microns (which actually works out to be a square array,
> even though the pixels aren't.)
>
> Width ratio: (165*13.75) / (7.4*1600) = .223
> Height ratio: (192*16) / (7.4*1200) = .297
>
> Now, I guess I could see opening the ST-2000 and moving the
> guider chip around. But the line you give also increases the
> width ratio. Is this due to some alteration you've made in the
> camera?
>
> -- Bill
>
>
>
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