Re: [APML] Cygnus in H-a (105mm)

[George Anderson <tillerman1@videotron.ca>]

Hi Brian

The kill switch makes life easier than a power on switch, you don't have
to hold your hand on the button all of the time.  :^)
In a pinch if you find a local Ham operator you may be able to get him
to modify the power inverter. Some of the cheaper ones use a simple RC
timer circuit that can have a pot added to give you a variable
frequency.
Or if it happens to be crystal controlled and uses a 4Mhz crystal
dropping in a TV colour burst crystal will put you fairly close in
frequency.
I had results that surprised me, I posted them on astrofilm.blogspot.com
.
The negative was scanned with a Polaroid SS4000 and the only work I did
in Photoshop was levels and a bit of curves. I made no attempt at
removing gradients caused by the moon. I want to study the negative more
and compare it to my previous shot before I attempt any gradient
correction.

George

Clear skies and good health

Brian larmay wrote:
> 
> Hi George!
> 
> Thanks!
> 
> I hope yours turned out for you too.
> Did you get it scanned yet?
> 
> I have a 1 rpm motor and a power invertor also to try
> out......just no kill switch yet.
> 
> That will be my best option for now.
> 
> Thanks again and good to hear from you.
> 
> Brian
> 
> --- George Anderson <tillerman1@videotron.ca> wrote:
> 
> > Hi Brian
> >
> > I am really impressed. I tried handcranking one
> > exposure six years ago
> > and had problems going beyond 5 minutes.
> > The resulting image looks really good.
> > I shot the same area tonight with my 135mm on TP
> > with the lumicon
> > filter, the film is in the wash at the moment and I
> > won't have time to
> > scan until tomorrow, but I hope my results look half
> > as good as yours.
> > I ran 5, 10 , and 20 minutes as I want to see just
> > how great a result
> > the moon had on the shot.
> > If you have 115V power where you shoot a 1/10 RPM
> > motor with a push
> > button switch to kill the power will get you by
> > while you wait to get
> > the drive controller fixed. The EQ-3 wants 1/11 RPM
> > so you will have to
> > interrupt fairly often.
> >
> > George Anderson
> > Montreal Canada
> 
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