From: "milton_aupperle" <milton@outcastsoft.com>
Date: January 21, 2010 9:40:24 PM MST
To: Astro_IIDC@yahoogroups.com
Subject: Re: New AstroIIDC user
I really could care less what Greg Crinklaw thinks or how he labels cameras. A camera sends frames of video to a Computer, whether it's a "web cam" or an SBIg camera. If his mind can't wrap around the fact that FireWire cameras can send them a hell of a lot faster than most "Astro" USB cameras, then that's his problem.
The Grasshopper has the same CCD used by Starlight Express and Orion cameras, so the only difference is your lucky if the "Astro" cameras can run at < 1 frame per second.
I like the freedom to run at hundreds of frames per second or a frame per hour with the same camera, my choice not because they have a slow interface or use slow microprocessors to move the data out of the CCD.
As far as STPro 3 goes for exposure calculation, I prefer empirical measurements than "guesses" especially given the unknowns one has when doing DSO imaging.
Later..
Milton Aupperle
--- In Astro_IIDC@yahoogroups.com, Mark Gaffney <markgaffney@...> wrote:
I know I`ve broached this question before, but.. Greg Crinklaw is
saying the Scorpion is really a Video/Webcam upon hearing the process
for acquiring images. If the camera is set as such the exposure
calculator in ST3 Pro isn`t applicable..Unless the CCD setting has
useful information..?(I have the details & nanometre readings etc.
input for the Scorpion as a CCD from info he interpreted from the
sensitivity graph...)
Mark.
On 22/01/2010, at 3:05 PM, milton_aupperle wrote:
Mark;
No. They put different CCD's in different Grasshopper models, just
like the Scorpions, Fleas etc.. The one I have (GRAS-14S5M-C) is
6.45 microns and it's an EXHAD CCD not a HAD (use Google to find the
difference). Basically it means the CCD is about 3 times as
sensitive as your 4.4 micron Scorpion is.
As far as filters go, I don't have a preference, except that they
should be parfocal. I got a good deal on the Astro Don E series as
they were being cleared out and were basically the same price as a
Baader.
HTH..
Milton Aupperle
--- In Astro_IIDC@yahoogroups.com, Mark Gaffney <markgaffney@>
wrote:
Hi Milton,
I thought I read that your Grasshopper is 4.4 microns too, is this
the
case? I guess there maybe other versions? I told the guy from
Adelaide
I`d get back to him with respect to the Astrodon`s but not at his
exhorbitant price! Kurt`s just written with qualified praise for the
Baader`s for their price. Do you think they`d be better than your
run-
of the -mill types like perhaps the Astonomicks, or any good at all?
Mark.