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TS 90/6.6 Telescope: Flatteners, 1.0X or 0.75X?

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#1 10gauge

10gauge

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Posted 13 November 2019 - 11:07 PM

Which field flattener is ideal for a TS Optics 90 f6.6 Telescope, 1.0X or 0.75X?...

I’m interested in purchasing a TS 90/6.6 Telescope to get into imaging with a Nikon full-frame DSLR. I’m trying to sort if I need adapters and/or extenders. I’m not sure if the systems below are valid.

 

1.0X Flattener System:

TS Optics 1.0X Flattener M68 Connection

TS Optics Adapter M69x1 to M48x0.75 for TS 2.5” Flattener

M48 to Nikon T-Ring Adapter. 36.5mm length.

 

0.75X Flattener System:

TS Optics 0.75X Reducer Corrector M48x0.75

M48 to Nikon T-Ring Adapter. 36.5mm length



#2 NaNuu

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Posted 14 November 2019 - 05:11 AM

I can't answer your question, but... I just bought one of those Potoline 90 f6.6 APOs - still without a flattener. Up to now Im using an 0.79 reducer/flattener (TSRED279) which seems ok (with an ASI 183MC, so rather different camera). As I was asking a similar question myself, I just wrote a short email to the folks on TS Optics - and they told me all the spacings, adapters and extenders I will need for either flattener system and my camera (which are not the same as for your's, I guess...)  So I'd suggest you ask them directly! Their replies are always rather quick and kind.


Edited by NaNuu, 14 November 2019 - 05:11 AM.


#3 10gauge

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Posted 14 November 2019 - 09:14 PM

I can't answer your question, but... I just bought one of those Potoline 90 f6.6 APOs - still without a flattener. Up to now Im using an 0.79 reducer/flattener (TSRED279) which seems ok (with an ASI 183MC, so rather different camera). As I was asking a similar question myself, I just wrote a short email to the folks on TS Optics - and they told me all the spacings, adapters and extenders I will need for either flattener system and my camera (which are not the same as for your's, I guess...)  So I'd suggest you ask them directly! Their replies are always rather quick and kind.

Thanks for the info! I asked TS Teleskop on 2 occasions and got 2 different answers: one with the 1.0X and the other with 0.75X. I’d like to know which will work better because upon close inspection, you can get some weird optical effects.




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