I have found a tasco 450 power astronomical reflector telescope D=4.5 F=900mm coated optics model no 11TR.it is missing some parts so i need a parts manual to find out what is missing.

The Tasco web site does not list that model-- however it is a small reflector style telescope similar to this model--

http://www.tasco.com/products/manuals/Luminova40-076420Inst.pdf

Use the above manual to help you assemble the scope.

There appears no manual for this model on the Tasco Resource page, but this one may offer some clues

http://www.tasco.com/products/manuals/Spacestation6LIM_49114900_49076700.pdf

Why? are you going to use the scope for terrestrial viewing -- bird watching etc etc

You do not need it for astronomical viewing--- no up or down in outer space.

Here are some:

http://www.astronomics.com/main/Image_Erecting_Prisms.asp/catalog_name/Astronomics/category_name/EDNECFUVSRWS8KLNTU5E38XSE1/Page/1

These are usually sold in 1.25 inch size-- measure the hole in the focuser.

Eyepieces are available from many on-line retailers -- measure the hole in the focuser. Eyepieces come in 3 sizes, .965, 1.25, and 2 inch.

The .965 is very hard to find. Here are two retailers
http://www.agenaastro.com/

http://stores.ebay.com/Telescope-Warehouse

All of Tasco's manuals are on this web site:
http://www.tasco.com/pages/instruction-manuals/

No sorry, no manuals for these scopes.

Read my tips on my profile page. This is a simple refractor telescope.

Difficult to find manuals for small telescopes. However Meade maintains a web site for all of their telescopes. Look under the REFRACTOR or REFLECTOR headings for a manual similar to your telescope. They all go together about the same.

http://www.meade.com/manuals/index.html

All astronomical telescopes show upside down images--- no up or down in SPACE!

These are very generic in design -- this may help you--

http://www.uk-telescopes.co.uk/beginners_guide%20to%20telescopes.htm

i actually have the star finder and its **** honestly. but well mine is old to. so a new one might do you better. but i've attached a rifle scope to mine.