RE: [APML] IC 410 uploaded and IC 405 adjusted

[Alan Voetsch <alanv12952@yahoo.com>]

Hey John,

--- John Mirtle <spampit@shaw.ca> wrote:
> 	Sorry if I missed your post about this a week ago, I was not
> available to answer. Have a look at
> http://www.astrofoto.ca/john/files/curves1.jpg - this is a scan of an
> Ektachrome slide with my old Minolta scanner. It sounds like you are
> only
> getting part way into the "hump" on the left side. To get the full
> hump (and
> all the faint image data) you will need to increase your exposure
> time with
> your scanner. Mess around with your settings, see if you can do this.

I'll check. As I said, there is an option for 'under-exposed slides.
Will this get a longer scan exposure? I'm not sure if under-exposed
means denser, or not.

> If you
> still can't, try pushing 1 stop next time out. It makes it easier to
> scan
> the dark parts of your slide.
> 	The next time you are out, take a couple of daytime shots too. 

OK, I will. I do always try to start a roll with 1 daylight shot, but
it would be hard to tell if there wasa problem from that because i dial
in the settings manually and it's been a long time since that high
school photography class.

> should confirm that your shots aren't dark due to weak chemistry
> where you
> are getting your film done. Looking at other people's work with E200,
> your exposure times are just nuts! 

Actually, except for the HH-Flame shot (150 minutes), most of the E200
shots were kept kind of short, for me anyway. In the 50-90 minute
range.

> I would like to see other FS-102 images
> using E200 for comparison. 

Me too. C'mon guys, give!

> Even with your SCT shots, your exposure times seemed to be longer
> than
> anyone else and still picking up less. Is there something between the
> camera
> and scope that could be reducing your photon flow? 

I did check today and there were no spiders, or beehives. I even pulled
my camera off and checked to see if the shutter was staying open. I did
a 5 second check, and it was. If it was partially closing during an
exposure, then that would show. So, that leaves the Taurus Tracker. It
may add to the focal length enough to slow me down to f/9. I have been
trying to look into another option that would allow me to reduce the
focal length, but so far no luck. My work schedule lately has been busy
enough to slow me down when it comes to things like that.

Again, thanks for your insights,
Alan

=====
SCT Astrophotography: http://www.pbase.com/avoetsch/astrophotography
FS-102 G-11/Gemini: http://www.pbase.com/avoetsch12952/tak_fs102
& http://www.pbase.com/avoetsch12952/fs102


		
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