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Takahashi EXTENDER-Q 1.6X

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#1 ken30809

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Posted 04 June 2020 - 06:01 PM

Just wondering why there are virtually no reviews on this device? The extender-q 1.6x would bring my FC100DL (f/9) up to f/14.4 and I was thinking might be great for my solar system observations. Does anyone have any experience with it? Thanks, and sorry if I missed some existing articles.

 

 

 



#2 chemisted

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Posted 04 June 2020 - 07:42 PM

I use the extender-q 1.6X with my Sky 90 all the time.  It is a fantastic optic, does its job perfectly and is completely invisible (adds or subtracts nothing) in the optical path.  I also use it with my Optical Guidance Systems 10" Ritchey-Chretien, an f/9 scope, with similar results.  I do not know of any reviews on this extender but it sure has been a winner for me.


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#3 alvin58

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Posted 04 June 2020 - 10:15 PM

I just ordered the E-Q 1.6X for the Sky 90 I obtained a few weeks ago. I'm hoping to be using it by end of next week. It kind of intrigues me the ability to have a short and long focal length scope on one. I'll let you know. Allen
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#4 25585

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Posted 05 June 2020 - 05:24 AM

Just wondering why there are virtually no reviews on this device? The extender-q 1.6x would bring my FC100DL (f/9) up to f/14.4 and I was thinking might be great for my solar system observations. Does anyone have any experience with it? Thanks, and sorry if I missed some existing articles.

Yes I do! On a DL too!! 

 

It's great & you don't notice it's there at all. F14.4 Fluorite doublet. 1440mm FL of optical excellence. Not that the DL's F9 needs flattening or any other correcting, I use my Q1.6x so longer FL eyepieces can be used to get higher magnifications. But with a 4mm eyepiece 380x is within the Tak's capability. For Moon & planets particularly, the views are excellent, atmosphere allowing. 


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#5 ken30809

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Posted 05 June 2020 - 09:12 AM

Wow - great feedback. Guess I'm sold on it. Thanks all.


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#6 smkoush

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Posted 05 June 2020 - 12:00 PM

I use it on a DZ, i.e., at f/12.8 with a Baader T-2 Zeiss prism diagonal. 

 

It is (as others mentioned) invisible, and I like that in the case of the DZ, the Q1.6x (TKA36595) is a 2" accessory that you simply put before the diagonal (i.e., not having to screw it on/off). 

 

The view from DZ+Q1.6x with the 12.5mm Docter (at x102) is absolutely stunning. Extremely sharp stars on a super flat field, it's gorgeous.

 

I *think*  DZ+Q1.6x with 6mm Abbe (at x213) is ever so slightly sharper than DZ with 4mm TOE (at x200). I tried this comparison few times, but seeing must be really good to make a conclusive statement. I got a hint of this few times, it is extremely subtle, and without the ability to go back and forth it would be extremely difficult to notice any difference (the DZ and TOE are very sharp optics). 

 

I also use it (for fun) with a 3.4mm Vixen HR at x376. Izar the other night was an orange and a blue ball separated by a black sky. When the seeing allows such observations (rare here in New England), it becomes much easier to see color differences between stars if the Airy disc is large. 


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