From: Milton Aupperle <milton@outcastsoft.com>

Date: February 10, 2006 3:24:01 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] Re: iBot, Trapezium

Hi Neale;

When your in "2x2" binned mode, the image brightness increases by 400% - so it may very well be over exposed.  So try setting "black point" to minimum, exposure time lower and set exposure time to say 33 ms - at least in doors.

Using both options should give you around 1.5 to 2 magnitudes deeper imaging, however it will also increase noise levels too - so their are no "free lunches".

I normally use a monochrome Unibrain camera with an 80 mm aperture F/4 scope in 2x2 mode and guide off Mag 5th to 7th stars in downTown Calgary (mag 2 to 3 skies visually) with 133 ms exposures.

HTH..

Milton J. Aupperle

President

ASC - Aupperle Services and Contracting

Mac Software (Drivers, Components and Application) Specialist

#1005 - 815 14th Avenue. S.W.

Calgary Alberta Canada T2R0N5

1-(403)-229-9456

milton@outcastsoft.com

www.outcastsoft.com

On 10-Feb-06, at 3:05 PM, neale_monks wrote:

Milton,

Cool! Will try the first idea out for certain. But the second idea doesn't seem to work with

the iBot at least. All I get is plain white "screen" with the sharpness numbers superimposed

at top left.

Cheers,

Neale