From: Milton Aupperle <milton@outcastsoft.com>

Date: August 6, 2012 11:40:32 AM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] PGR GrassHopper Express 2.8 and Extended Shutter

Dave;

From page 90 of the Astro IIDC manual:

The "Allow extended PGR cameras exposure times. check box is only available for Point Grey 

Research's Dragon Flys, Fleas, Scorpions, Chameleons and Grasshoppers cameras. You 

should only be using it IF you have connected the corresponding GPIO 0 and GPIO1 pins 

together using solder or some electrical bridge component. If those pins are not properly 

connected, it will never deliver video frames. NOTE that If you have check marked the "Use Pin 4 

for Trigger" item under the "Camera Trigger Method" sub menu (see page 29), then you need to 

connect up the corresponding GPIO 2 and GPIO3 pins. 

HTH..

Milton Aupperle

On 6-Aug-12, at 1:59 AM, Dave Goodyear wrote:

Hi Milton and Crew. 

So I went out tonight to test my new cooler with some DSO work.  The PGR GHX 2.8 has always worked well doing solar.  I have always noticed the longer exposure times but of course in solar you don’t need those extended shutter times.  While trying to do DSO, any shutter speed over  .533 sec would cause the image never to change.  Meaning I could set the shutter speed at .533 and watch the diffraction rings of a star “pulse” or wave because of the seeing.  If I changed it to .766 or 1 second or 10min the star capture would never change.. It would freeze on the last .533 capture.  The count down on top of the video preview window will count down but the image never changes.  The program never froze, just the image would never do an extended exposure over .533 seconds.

If I went into preferences and uncheck PGR extended shutter support, the camera would work on all shutter speeds up to a maximum of 1 second without issues.  When you uncheck PGR extended shutter support, the maximum shutter time is 1 second.  If I check this box and restart Astro IIDC, the same issue happens like I explained above. 

Thoughts?  Thanks..

Dave Goodyear

KB2 Networks Inc.

214 Main St. #318 &n bsp;                          

El Segundo, CA  90245

310-933-2436