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Reducer recommendation for Esprit 150

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#1 Eric H

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Posted 14 October 2019 - 10:12 AM

I am wondering about a reducer for the Esprit 150 and not sure what might work best for the f7 refractor. Any recommendations?

 

This would need to work with a 16200 chip with 35mm diagonal size.


Edited by Eric H, 14 October 2019 - 10:13 AM.


#2 Kaydubbed

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Posted 14 October 2019 - 11:35 AM

Apparently the Riccardi works with this scope

 

https://www.apm-tele...po-reducer-set1


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#3 Marcelofig

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Posted 14 October 2019 - 02:08 PM

I'd recommend you wait a little. Some time ago SW announced that it is developing reducers for its Esprit line.

 

No idea of dates or prices, but a reducer specifically developed for this telescope should work without problems.


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#4 Josef1968

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Posted 14 October 2019 - 02:36 PM

Hello!

 

I use the ES x0.7 and the Astro Professional x0.8 and am very happy with them.

https://www.astrobin...szm510/?nc=user

https://www.astrobin...373704/?nc=user


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#5 gezak22

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Posted 14 October 2019 - 02:55 PM

The Espit 150 has an image circle of 44 mm, so with a 0.7x reducer it will be reduced to 31 mm, which will vignette on a 35 mm sensor. The 0.8x reducer would be better, but is 0.8x really worth it?


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#6 Eric H

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Posted 14 October 2019 - 03:21 PM

SW says a company is working on a .65x reducer but its image circle will be only for aps-c and smaller.



#7 gezak22

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Posted 14 October 2019 - 04:31 PM

That is the nature of reducers. If an unreduced image circle is 'a' mm, then a reduction to 'b' gives an image circle of a*b mm.

 

There is a very good reason why the Tak FSQ130 offers a crazy unreduced image circle of 110 mm - because Tak still wanted to support full frame illumination in their reduced configuration (44 mm at f/3).



#8 Eric H

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Posted 14 October 2019 - 08:16 PM

Thanks all!




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