From: "Tim" <tjp314@pacbell.net>

Date: August 12, 2005 8:35:28 PM MDT

To: Astro_IIDC@yahoogroups.com

Subject: Re: Cooled Flea Camera Shots

Milton and Bob:

Milton, I emailed Point Grey and the prices are about what I expected, from what you told

me. They asked that I not forward the price lists, so others interested should contact them

on their own.

I also asked about whether the cable on the extended dragonfly could be longer than 6",

and they said that longer cables introduce objectionable noise to the image. So, if I were

to do something so crazy as to build a "camera" using a Newt primary and put the camera

head at the focus with the electronics board on the outside tube wall, it'd have to be about

an 8 or maybe at most a 10", for the cable to reach the center of the tube. Oh well, the

image degradation and obstruction of having a secondary mirror is probably small, and

offset by the ability to use the scope visually!

Hm... Anything wrong with wrapping the camera with ziplog bags filled with water ice? Or

is leakage or condensation a serious concern?

-Tim.

--- In Astro_IIDC@yahoogroups.com, Milton Aupperle <milton@o...> wrote:

Hi Bob;

On 12-Aug-05, at 5:28 PM, bob piatek wrote:

COOL! :)

LO - cool indeed :)

I like the ingenuity on the design of the 'chernobyl protection'

with the rubber bands.

The other thing Is I need a strapping that won't conduct heat either,

which is why I shied away from any form of wire. And I want it

reasonably flexible so I could reconfigure it and try it on another

camera too, like some of the Imaging Source Cameras.

Too bad you have to cool the entire camera. If there were some way

to just cool the image sensor chip, you could use a MUCH smaller

Peltier cooler.

There's no space in the Flea design for that, it's only 1.25" by 1.2"

by 1.2" inches in a packed cube (neat multi board stacked design

though - similar to some of the Pulnix cameras I've worked with)).

However the Extended Form Dragon Fly camera could easily be done that

way, as the CCD is on a 6" cable away form the main electronics.

You'd have to check with PGR to make sure, but you may be able to

drill or cut through the PCB and expose the back of the CCD too.

You should take some dark frames with the setup and post the results.

Eventually i will. I hope to play with it a little bit on vacation

(which starts middle of next week). However it's sort of moot too,

because we are in a cold snap and it gets down to 4 centigrade / 39 F

here at night and our day time high her was 13 Centigrade / 55 F. Two

weeks ago we were in the 90's during the day time.

TTYL..

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@o...