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Attaching the flattener to a filter wheel

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#1 Burn213

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Posted 20 November 2018 - 07:24 PM

So, I want to buy ZWO ASI 183 MM PRO with a manual 5x filter wheel, and also I need somehow attach the TS-Optics PHOTOLINE 2" 0,79x Reducer and some additional spacers to it. But I'm confused about the imaging train construction. So, do I need some other accessories to all of these?

 

P.S Scope is TS-Optics Photoline 72mm f/6

 

 

Clear Skies,

 

 

 

Burn213



#2 Gipht

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Posted 20 November 2018 - 07:35 PM

With my ASI183 pro,  the filter wheel connected directly with the flattener/reducer and  I put the spacers between the filter  wheel  and the camera.  Perhaps it was just luck, but the spacers included with the ASI183 pro got me to the proper spacing.   You may want to wait until your camera arrives before you start buying extra stuff. 


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#3 Stelios

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Posted 20 November 2018 - 08:34 PM

There are three variable length spacers I know of.

 

Stellarvue has an 8-12mm one.

Baader has a 20-29mm and a 29-45mm. 

 

For smaller spacing, Agena astro carries a bunch of them (as do others, but I always love to plug that great, fast and responsive vendor). 



#4 rngr777

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Posted 20 November 2018 - 10:14 PM

IF your f/r requires 55mm of backspace. The camera should include all the spacers you need to reach that. Camera, filter wheel, m42m42 adapter, 11mm t2 extender, 16.5mm extender, f/r.

#5 Burn213

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Posted 21 November 2018 - 06:34 AM

Ok, I get it, thanks. 

 

And another question, If you please.

 

does this reducer 

 

TS-Optics PHOTOLINE 2" 0,79x Reducer 4-element for Astrophotography

 

Also flattening the field with a reducer function. Or it does only reducing? 



#6 Der_Pit

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Posted 21 November 2018 - 09:55 AM

Assuming it is this one - yes, that is both corrector and reducer.


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#7 RJF-Astro

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Posted 21 November 2018 - 12:34 PM

TS-Optics also has a variable spacer. I use it, does a nice job.


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#8 bobzeq25

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Posted 21 November 2018 - 03:39 PM

Ok, I get it, thanks. 

 

And another question, If you please.

 

does this reducer 

 

TS-Optics PHOTOLINE 2" 0,79x Reducer 4-element for Astrophotography

 

Also flattening the field with a reducer function. Or it does only reducing? 

It flattens.  But, if you can get a flattener that's labeled by the manufacturer as being specifically for your scope, it may well be better.  The shelves of imagers are littered with mismatched flatteners.  DAMHIK.  <smile>

 

The above is probably why TS does not label it is a flattener.  They do not want to deal with ("It doesn't flatten my scope!").


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#9 Der_Pit

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Posted 22 November 2018 - 06:51 AM

Not sure (I'm no native speaker), but I'd interpret this

Its four element design offers good field correction superior to cheap 0.8x reducers.

as promising (decent) flattening.  It's a Riccardi-type design, after all.

 

(and for really flattening your scope you might try a steam roller mrevil.gif )




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