From: Milton Aupperle <milton@outcastsoft.com>
Date: November 28, 2007 4:13:42 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: [Astro_IIDC] New Flea2 models
Hi Tim;
On 28-Nov-07, at 3:27 PM, Tim wrote:
Milton:
I just got an email from Pt Grey announcing a couple of new Flea2
models in the works.
One uses a 1/3" 1.3MP EXview HAD ccd, and the other uses a 2/3" 5MP
SuperHAD ccd. Both have pretty small pixels, 3.75 and 3.45 microns,
respectively.
But a 2/3" chip in a camera that's only about a 1 1/4" cube? That's
pretty amazing.
If you take a Fleas apart, you can see the boards are all packed in a vertical direction. The CCD basically sits on the board by itself. It's a similar design that Pulnix used of their cameras.
So, which is more sensitive, an EXview HAD or a SuperHAD?
ExView HAD is more sensitive by about 100% or 2x times. It also has somewhat better well depth too.
So the Flea2 1/3" EXView HAD (3.75 microns per pixel) will have about the same light gathering ability as your Flea 640x480 (at 7.4 microns per CCD pixel) does, just more pixels.
However the Flea2 are still 12 bit camera not 14 bit like the Grasshoppers. For long exposure they still have the amp glow issue and although I've had several conversations on this issue with PGR on turning it off, nothing has materialized.
TTYL..
Milton J. Aupperle
President
ASC - Aupperle Services and Contracting
Mac Software (Drivers, Components and Application) Specialist
#1005 - 815 14th Avenue. S.W.
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1-(403)-229-9456
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