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Hi! I own an 80's model Criterion Dynamax 8 SC telescope which I would like to take apart to install a straight-through Finder Scope. At the same time I'd like to remove the primary mirror and clean it. What I need is some kind of mechanical drawing of how such a scope is put together inside so I can put it back together properly. Criterion offered a guide for such a task but wouldn't send it with the telescope when new but only by special request. Of course now, they're not around any more. But since I've been using the scope for 30 years, It's time to take it apart. Anybody have such a drawing or guidebook for the task

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This is their SCT model-- it comes apart very similar to the pictures in this article:

http://www.astromart.com/articles/article.asp?article_id=594

Read the article and see the pictures.

Posted on Oct 09, 2010

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Hi The sross hair on the finder scope has broken. How do you get the scope apart to replace the broken hair? Robert Jenkins


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You have a very nice scope-- buy another finder -- I would suggest that you mount a Telrad finder like this one.

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You will need a diagonal, eyepiece and a finder scope. The photo tripod is not the greatest for astronomy. Acceptable for the moon and quick views of the planets but with a SCTs narrow view, you will be constantly adjusting the tripod.
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http://www.agenaastro.com/

http://www.telescope.com/control/category/~category_id=telescopes?atc=ggldlp&gclid=CNC2_eT8oqUCFUHsKgodywuvHA

Be aware that the Bausch and Lomb telescopes had terrible reputation for bad optics.

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http://www.telescope.com/control/telescope-finder-scopes

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You will not find a manual for these small telescopes.

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Now you can use the small finder to locate objects in the sky-- the moon should be your first night time target.

Read this:
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This is a small refractor telescope-- they pretty much all work the same-- BUT don't expect to get more than 100 power out of the scope. Yes I know the box said 600 power but it's a lie. In my 8 inch telescope I rarely get above 250 power and my scope is many times larger than the one you have--

Now put the eyepiece with the largest number written on it into the telescope-- the LARGER the number the LOWER the magnification. During the day time practice focusing on a distant object --- AND line-up the small finder scope on top with the main telescope tube. Look at the top of a distant light or church steple, or telephone pole. Without moving the telescope adjust the small finder scope by loosening and tightening the screws around the tube holding the finder scope-- put the crosshairs on the same spot as the main telescope.

Now you can use the small finder to locate objects in the sky-- the moon should be your first night time target.

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Your finder is not aligned with your telescope. During the day time focus on a distant small object with the telescope-- then without moving the telescope adjust the crosshairs in the finder to match the telescope.

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