Re: Telescope upgrade


"Holly, in France" <me@xxxxxxxxxxx> wrote in message
news:4493dgF10lduU1@xxxxxxxxxxxxxxxxx
> Chris Taylor wrote:
>>
>> I had the 114GT and while it would track an object visually for many
>> minutes it wasn't able to track an object accurately on its own for
>> more than about 15 seconds without star trailing becoming an issue.
>
> I might be being a bit dim here, but please could you explain what you
> mean in a bit more detail? Thanks,


Take a picture of a distant car with its tail lights on in the daytime and
you'll likely get a picture of; a car with its tail lights on. Take a
picture at night when you need longer exposures and you're likely to get a
blurred trail of tail-lights because you can't hold the camera steady
enough.

In camera speak, your eye takes many short exposures and your brain
compensates for an image moving around a little, kinda like a TV picture.

Poor tracking of an object with my old 114GT was compensated for visually by
the eye and brain. Imaging/Photography will record all of the movement of
the mount and its tracking and offer an image that has been moved around
proportionally. Stars will begin to show trails not unlike the tail lights
in the example above.

The scope should be good enough for solar system work, where short exposures
are required but will not easily be used for deep sky stuff where longer
exposures are required..

Hope this explains a little more? If not, feel free to shout-up.

Regards


Chris



.

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