Hi Tom,

Hmmm... as was suggested, about the best you can do here is to change
the sizes of the zoom levels, rather than the limiting magnitudes. (Each
zoom level corresponds to a 1.3 magnitude change. If you're at, say,
level 4 with a limiting magnitude of 6.5, and you hit Alt-8 to go to
level 18, the magnitude limit will go up by 14*1.3 = 15.6, to 21.1.
As has been pointed out, the likelihood that Guide will show you actual
mag 21.1 stars is pretty low!)

It occurs to me, though, that the 1.3 mags/level factor could be
tweaked. In the next update I post, one will be able to hit Alt-J and
enter text such as

MAGS_PER_LEVEL=1.5

If you did that, then in the above example, you'd go from a mag
limit of 6.5 to a mag limit of 6.5 + (14 * 1.5) = 27.5. (At which point
I can _guarantee_ you that Guide won't show mag 27.5 stars.)

-- Bill

On 04/02/2013 06:39 PM, tom wrote:
> Hi,
>
> Normally, when I view the screen for my ccd size showing the ccd frame,
> I want to see 20th magnitude. As I zoom out there are fewer stars
> showing but presently there are still too many stars showing in the
> wider views. How do I change the rate at which the stars disappear as I
> zoom out without changing the zoomed-in values of 20th magnitude? I use
> the mouse wheel to zoom.
>
> Tom
>
>
>
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