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SharpStar 100Q - worthy rival to a TV NP101?

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#1 25585

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Posted 01 December 2019 - 08:58 AM

Definitely cheaper, & now available in Europe https://www.365astro...-telescope.html

 

Anyone with experience?  There are smaller quads in the range as well.


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#2 syxbach

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Posted 02 December 2019 - 03:04 PM

You can check my first image of 100QII.

 

https://www.cloudyni...olecular-cloud/

 

Definitely cheaper, & now available in Europe https://www.365astro...-telescope.html

 

Anyone with experience?  There are smaller quads in the range as well.


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#3 Gavster

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Posted 02 December 2019 - 06:34 PM

I heard that there have been collimation issues with some of these 4 element scopes. But if you get one that is well collimated I think it will be good.


Edited by Gavster, 02 December 2019 - 06:59 PM.

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#4 Gavster

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Posted 02 December 2019 - 06:55 PM

But I think I’d be more interested in the new 121sdq 5 element Sharpstar/ts optics which I think has just been released. This doesn’t look too dissimilar from the np127...

https://www.teleskop...tfield-Apo.html


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#5 25585

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Posted 06 December 2019 - 09:09 AM

But I think I’d be more interested in the new 121sdq 5 element Sharpstar/ts optics which I think has just been released. This doesn’t look too dissimilar from the np127...

https://www.teleskop...tfield-Apo.html

Yes indeed!



#6 ezwheels

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Posted 06 December 2019 - 11:45 AM

That new 121sdq looks good. I am not sure if it is possible, but it would be cool if it had a reducer available that would keep the flat field. For a full frame CMOS camerawink.gif , somewhere around 500-600mm FL would be ideal for most wide field targets.


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#7 Gavster

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Posted 06 December 2019 - 06:01 PM

That new 121sdq looks good. I am not sure if it is possible, but it would be cool if it had a reducer available that would keep the flat field. For a full frame CMOS camerawink.gif , somewhere around 500-600mm FL would be ideal for most wide field targets.

TS states that the Televue 0.8x flatfield reducer would work fine with this scope giving 540 fl.

https://www.teleskop...field-Apos.html
 

I have to say I am very close to pushing the button and purchasing this new 121mm flatfield scope that is less than half the price of an np127.


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#8 ezwheels

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Posted 06 December 2019 - 07:46 PM

TS states that the Televue 0.8x flatfield reducer would work fine with this scope giving 540 fl.

https://www.teleskop...field-Apos.html
 

I have to say I am very close to pushing the button and purchasing this new 121mm flatfield scope that is less than half the price of an np127.

I looked into it and the problem, as stated on the technical data tab on the site, is first that it is not listed to work with that scope and that, if it does, the flat imaging circle is then reduced to 30mm with that unit and the back focus is now 55mm (short as well). That is way too small for my liking. A minimum of a 44mm imaging circle is the cut-off for FF sensors... and I am getting one of the new IMX455 cameras. 

 

Scope looks very compelling otherwise.



#9 Gavster

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Posted 07 December 2019 - 12:16 AM

I looked into it and the problem, as stated on the technical data tab on the site, is first that it is not listed to work with that scope and that, if it does, the flat imaging circle is then reduced to 30mm with that unit and the back focus is now 55mm (short as well). That is way too small for my liking. A minimum of a 44mm imaging circle is the cut-off for FF sensors... and I am getting one of the new IMX455 cameras. 

 

Scope looks very compelling otherwise.

I think the reason the scope is not stated in the technical tab is that the scope is new. Telescope express link to the reducer from the accessories bit of the 121sdq section so it should therefore be fine. I agree with your other points.


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