rough

Just to let everyone know my guide to buying a telescope is online at:

http://spacetweepsociety.org/page/buying-right-telescope-rough-guide

It's a general overview of what is available, what to consider and what you can do. A lot of folks have asked me about this since I got my own telescope, and attended a talk on the topic by Sky at Night magazine's Reviews editor Paul Money.

This is a basic guide to help you chose the right telescope for you. This is not an exhaustive list, but a collection of things I've learned over time.

WHAT TYPE OF TELESCOPE:

This is a summary of the 4 main types of telescope and their + and - points. It's mostly practicality advice and I have tried to keep my opinion out of it.

Newtonian Reflector:

+ Large aperture (more light in) is relatively cheap

+ No lenses so no colour fringe issues

+ Large range of sizes

+ Very little dew build up as there's no lens in the front of the tube

--

- Large aperture scopes are long too and can be cumbersome

- Bigger scopes are quite heavy due to the large lower mirror

- Needs a decent mount as length needs balance

- Eyepiece on side can be awkward to get to as it's at the front.

- Can catch on tripod at near-vertical orientations due to length

- For optimal performance the mirrors need collimating (aligning). This is straightforward but isn't usually required on other scopes

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