Baader TZ-3 spacing asistance

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
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torsinadoc
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Baader TZ-3 spacing asistance

Post by torsinadoc »

I am confused on setting up my Baader telecentric to use with a Daystar Quantum. Per documentation the proper spacing is 250mm. Is that for the camera or the Daystar? Is that measured from the front (telescope end) or back of the TZ-3? Later in document mentions the original focus position is ~ 86 mm behind the front end of the telecentric lens assy. I interpret that as the Daystar should fit directly on the back of the tele centric (#1) and the camera should be positioned 250mm (#2)? Is this correct?

ImageIMG_9427 by Franklin Diamond, on Flickr


DavidP
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Re: Baader TZ-3 spacing asistance

Post by DavidP »

Franklin. I believe you have it correct. The camera sensor should be spaced 250mm behind the rear lens element of the TZ-3. The filter directly behind the TZ-3.
The scope’s original focus should be positioned 86mm behind the front lens element of the telecentric. This is not exact for all scopes. To come to focus, I had to bring the telecentric forward relative to the original focus.


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Re: Baader TZ-3 spacing asistance

Post by DavidP »

The cardboard tube helps you find the relation of the telecentric to the original focus.


torsinadoc
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Re: Baader TZ-3 spacing asistance

Post by torsinadoc »

Thanks


Ljungmann
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Re: Baader TZ-3 spacing asistance

Post by Ljungmann »

You got it right!! The filter just behind the TZ-3.
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