From: albe albo <richter1956@yahoo.com>

Date: February 5, 2010 1:22:20 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: [Astro_IIDC] new filter wheel...!

Yes, the TIS AS can reach an hour of exposure but practically i nevew went beyond 3 or 4 minutes because it's difficult to manage the noise.

Most of my DSO images are about 1 minute or 2.

Now i link the pic of my Atik f. 3.3 setup... i gues you are veeeery long unless you have some hidden trick.

http://dl.dropbox.com/u/1094920/ATIK-DMK-F33.jpg

Cheers

Alberto

Da: Mark Gaffney <markgaffney@me.com>

A: Astro_IIDC@yahoogroups.com

Inviato: Ven 5 febbraio 2010, 16:15:24

Oggetto: Re: [Astro_IIDC] new filter wheel...!

By the way Alberto, 

I was wondering how you got by the "time exposure" problem with your TIS cameras. Don`t you have to open the shutter for an extended time when doing your pictures of DSO`s? PGR cameras have this option but I thought TIS ones didn`t..?

Mark. 

On 05/02/2010, at 9:54 PM, albe albo wrote:

Wow, nice assembly.

In my experience the f3.3 reducer doesn't allow those long  extensions.

I have the same atik wheel and the same 3.3 reducer but, in order to use the DMK camera with the 3.3 reducer, i had to attach the camera practically directly on the wheel in addition even the pipe between the reducer and the wheel had to be minimal.

If i remember correctly the total length from the back of the reducer and the camera (including the wheel) had to be approx. 45 mm otherwise the reducer becomes useless.

Do i miss something?

if i understood correctly you didn' test it on the road.

Please let us know!

Cheers

Alberto

Da: Mark Gaffney <markgaffney@ me.com>

A: astro_IIDC@yahoogro ups.com

Inviato: Ven 5 febbraio 2010, 08:12:46

Oggetto: [Astro_IIDC] new filter wheel...! [1 Attachment]

Here`s a picture of my set-up with the new Atik filter wheel..
(perhaps?) I`ve yet to get the LRGB filters, probably a couple of
months away. I had enough T-thread adapters with the 2 different sized
ones that came with my Meade f3.3 reducer & those provided with the
filter wheel to perform basic connections at least. As to how things
work optically..we` ll see! I know with the Meade reducer it took a
good deal of screwing & unscrewing connections in the dark when I
first imaged with it (taking the moon) to get it to work at all. I
also have an Antares f6.3 reducer as well as the Mogg 0.3x to play
with & am pondering whether I should get another Mogg one? At least
they will attach to the camera`s nosepiece independently. The picture
shows the Scorpion 20SO at back..a Mogg adapter which takes the
cameras nosepiece etc. (I forget the serial number)..one of the Meade
T-thread adapters..an Atik one before the filter wheel..the FW..a ring
which came with the Atik another Meade t-thread..the Celestron Radial
Guider, then the Meade f3.3 reducer..I`ll have to write this all down
so I know what goes with what..!
Mark.