Skywatcher 750mm F5 and prime focus photography?

Hi,

I've been thinking about getting a T-adapter for the DSLR that I'm
about to buy, so that I could also try some prime focus
photography. Unfortunately, I've heard that it's not possible with all
telescopes, especially Newtonian reflectors, as it may be impossible
to reach the focus point.

So, what I'm curious about, is whether anyone has Skywatcher 750mm f/5
telescope and has tried prime focus stuff with it. The telescope is
supposedly sold by many other companies as well with just a different name,
and the original manufacturer is Synta.

I have a 750mm f/5 refractor, for prime photography a extension to the
focuser was needed, A friend made one for on his lathe me , I have been told
that Vixen Extension will fit the Synta scopes

Phil
"Mika Yrjola" wrote in message
...
Hi,

I've been thinking about getting a T-adapter for the DSLR that I'm
about to buy, so that I could also try some prime focus
photography. Unfortunately, I've heard that it's not possible with all
telescopes, especially Newtonian reflectors, as it may be impossible
to reach the focus point.

So, what I'm curious about, is whether anyone has Skywatcher 750mm f/5
telescope and has tried prime focus stuff with it. The telescope is
supposedly sold by many other companies as well with just a different
name,
and the original manufacturer is Synta.

So, what I'm curious about, is whether anyone has Skywatcher 750mm f/5
telescope and has tried prime focus stuff with it.

Your scope is a Newtonian??? In most cases I think one cannot reach focus and
the 1.25 inch focuser may cause Vigenetting. You maybe able to install a 2
inch Low Profile focuser and kill 2 birds with one stone...

jon

Mika Yrjola wrote in message ...

I've been thinking about getting a T-adapter for the DSLR that I'm
about to buy, so that I could also try some prime focus
photography. Unfortunately, I've heard that it's not possible with all
telescopes, especially Newtonian reflectors, as it may be impossible
to reach the focus point...

You can find out for yourself easily: point the
scope at something reasonably bright (I usually
use the Moon) and hold a white card off the end
of the focuser to see where prime focus is. Then
you can decide how to proceed.

Laura Halliday VE7LDH "Que les nuages soient notre
Grid: CN89mg pied a terre..."
ICBM: 49 16.05 N 122 56.92 W - Hospital/Shafte

(Laura Halliday) writes:

Mika Yrjola wrote in message
...

I've been thinking about getting a T-adapter for the DSLR that I'm
about to buy, so that I could also try some prime focus
photography. Unfortunately, I've heard that it's not possible with
all telescopes, especially Newtonian reflectors, as it may be
impossible to reach the focus point...

You can find out for yourself easily: point the
scope at something reasonably bright (I usually
use the Moon) and hold a white card off the end
of the focuser to see where prime focus is. Then
you can decide how to proceed.

How much the distance of the object matters; I'm asking this because
the moon is getting pretty fast close to new moon and is visible only
at somewhat uncomfortable times for a week or two Is e.g. a bright
street light a few hundreds of meters away too close to work in
satisfactory way?