Re: [William-Optics] Re: First photo with ZS 105 and a question
- Thanks Barry. This looks exactly the same as what I
am seeing. Easily processed out like you said. I am
glad that it is not a baffle problem then. I can live
with the small amount of vignetting, I guess I was
just curious to see if anyone else had noticed it. It
is very slight and I'm not complaining.
--- Barry Carter <chiron666@...> wrote:
> I concur, there is slight light fall-off in thehttp://www.barrie-tao.com/graphics_jpg/wo105_test_m57_raw.jpg
> corners. This can
> be removed by taking flat frames however. Using a 6
> mp Nikon D50,
> this 5 min single frame at ISO 800, of the Lyra
> region and Ring
> Nebula (M57). This is the raw straight out of the
> camera frame; re-
> sized to save space. It shows the extent of the
> vignetting I get
> with the ZS105mm....
> --- In William-Optics@yahoogroups.com, "chris"
> > I have started to process my first few photos
> through the ZS 105.
> > have noticed a slight vignetting in all of my
> photos, whether at
> > or with the WO reducer. I am beginning to suspect
> a baffle being
> > culprit, although I am by no means an optical
> expert, or even a
> > for that matter. I know Barrie has been imaging
> with the same
> > and wonder if he or anyone else has noticed this?
> I also
> mentioned in
> > a previous post about a "field stop" at the end of
> the focuser
> > drawtube. Would removing this "field stop" give
> me a fully
> > illuminated frame? For the record I am use to
> dealing with a lot
> > vignetting in my Newt, but was suprised to see it
> even at F/7 with
> > 105. This is my first refractor and first photos
> taken through
> > so I am just curious to know if this is out of the
> ordinary? Any
> > would be greatly appreciated. Thanks.
> > Chris
> > --- In William-Optics@yahoogroups.com, "chris"
> > wrote:
> > >
> > > I have uploaded a 1 hour exposure on E-200 film
> into my folder
> > > P. Levels and selective sharpening in PS CS.
> The slide looks
> > > better through a projector than the image I
> uploaded. This
> scope is
> > a
> > > keeper.
> > >
> > > Chris
> > >
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