Re: Camera for digiscoping
- From: "Rune Allnor" <allnor@xxxxxxxxxxxx>
- Date: 17 Jul 2005 14:42:24 -0700
Jerry Avins wrote:
> Rune Allnor wrote:
> >
> > RahQ5@xxxxxxxxx wrote:
> >
> >>I don't digiscope but was always interested in this type of photography.
> >>I just bought a telephoto lens for my cam.
> >> I also went through your pictures and they are great!! I think you did
> >>a great job!
> >
> >
> > Thanks. I am a bit frustrated, though, as I remember how the birds
> > looked "in vivo". While some of these birds stayed around for a long
> > time and thus gave me the opportunity to shoot several tens of images,
> > I do find myself very busy when operating the camera. The camera must
> > be properly aligned to find the image in the eyepiece. Sure, the
> > alignment ring helps a bit, but there is a lot left to be desired.
> > The camera must be at the correct distance from the eyepiece, to
> > reduce/eliminate vignetting. The scope must be focused. The camera
> > autofocus must have time to work. I must hold the camera still when
> > shooting. And preferably, the subject must stay in the picture while
> > all this (which it is up to me to make happen) takes place.
> >
> > There really isn't a lot of leeway to play with, as I tend to shoot
> > at very long distances most of the time. The birds shot at long
> > distances tend to be blurred if something goes wrong, although
> > exceptions have happened (like the swan, which was shot at only
> > hlf the distance indicated by the caption).
> >
> > I can't do much about light conditions or atmospheric noise, but I
> > can get a camera that is properly fixed to the scope, where focusing
> > mode, shutter release and/or aperture controls can be pre-set to work
> > well with the scope, and where I only have to focus the scope and
> > press a remote shutter release when the bird is in view. Getting
> > that sort of kit together would make it possible to get images that
> > do both the eiders and the long-tailed ducks some sort of justice.
> >
> > If I can find that sort of camera, that is...
>
> Do I recall that your scope has detachable eyepieces? If so, then an
> adapter can be made to mount in place of one.
Yes, you are right. Unfortunately, the mount is a rather complex one,
that is - as far as I know - particular to the manufacturer of the
scope. It *is* possible to do as you describe below, through a 1.25"
astro eyepiece socket, but I'd prefer not. Astro eyepieces are not
my favourite choise, and I'd prefer not to switch eyepieces for
photography.
> If film photography is
> acceptable, then an SLR and T-mount adapter might be superb.
Such kits are available for my scope. I can even use the filter
skrew threads to fit the 50 - 85 mm lens of my Nikon SLR camera,
on the eyepiece. I haven't tried to shoot pictures with it,
though.
> In addition
> to the modified eyepiece that mounts my digital camera*, I use an
> aperture-priority film camera with both my 50 mm ans 125 mm scopes.
> Fixed magnification is a drawback, but the resolution is high enough to
> allow severe cropping. My available focal lengths are 400 mm f/5, 1250
> mm f/10, and 788 mm f/6.3
I find that the optical zoom (3x) of my camera is more than enough.
With 30x scope magnification * 3x camera zoom, there is seldom
enough light for good pictures. If there is, the air is so warm that
the images are unsharp because of that.
> ___________________________________
> * http://users.rcn.com/jyavins/photoadapter.htm
Nice job with the adapter!
Rune
.
- References:
- Camera for digiscoping
- From: Rune Allnor
- Re: Camera for digiscoping
- From: RahQ5
- Re: Camera for digiscoping
- From: Rune Allnor
- Re: Camera for digiscoping
- From: Jerry Avins
- Camera for digiscoping
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