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  #41  
Old 12-06-2018, 09:25 PM
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There is a slight green bias in the FSQ106ED. It comes from the paint Tak uses on the inside of the tube. I thought it was the mustard coloured objective coatings but its not.

When I first took an image with the TEC110 fluorite the increase in colour was immediate and easy to see.

FSQ106ED probably is sharper than the 106N and no vignetting like the 106N can do on bright stars near the edges of the image.

I'd love to see more FSQ130 images but I guess at a $20,000 landed cost you won't see too many.

Greg.
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  #42  
Old 13-06-2018, 08:16 AM
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I only know of ONE user of a 130 here. No posts with pictures from him at all.

I might have a look on astrobin.
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  #43  
Old 13-06-2018, 05:27 PM
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I am not sure how much of a jump 106 to 130mm aperture is.
106 will be wider but the 130 has a reducer available which I suppose takes it back to closer to the 106 FOV.

The cost of the 130 is of course very high and puts it up against much larger instruments for the same price. But then you are starting to lose the widefield strength of the FSQ design.

So perhaps 106 is the ideal aperture and 130 is getting too long focal length and competes with 140-155mm instruments or larger compound scopes.

Hard to say without seeing a lot of example images. I have seen a couple but surprisingly they were done with modded DSLRs. It seems strange to spend that much on the scope and then use a modded DSLR but whatever people are used to using I suppose but despite that they were impressive images.

Greg.
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  #44  
Old 13-06-2018, 08:15 PM
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fwiw) There's a TOA 130 on Astromart for $4k US.
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  #45  
Old 13-06-2018, 08:41 PM
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130 mm should have smaller spot size comparing to a 106mm scope. IMHO a high quality 130mm with a high quality reducer would be a more capable instrument, especially when working with KAF16200 or similarly sized sensor. One of the best reducers would have to be 0.72x Quad Telecompressor from AP that fits a 3.5" FTF. I know that CFF is testing prototypes of 0.75x reducers dedicated for their refractors. Then there are 'mass produced' Riccardi reducers, but their quality apparently varies from model to model.
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  #46  
Old 13-06-2018, 09:05 PM
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Drs Jim & Linda Powell at DSW who kindly take my requests for targets and share data with me have a TEC-160FL with a SXTL-16200 camera and the combination produces some stunning results. Just sayin' Greg. Maybe 110-115 is not thinking big enough
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  #47  
Old 13-06-2018, 09:26 PM
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Quote:
Originally Posted by clive milne View Post
fwiw) There's a TOA 130 on Astromart for $4k US.
A TOA 130 would be a nice instrument.

Quote:
Originally Posted by Slawomir View Post
130 mm should have smaller spot size comparing to a 106mm scope. IMHO a high quality 130mm with a high quality reducer would be a more capable instrument, especially when working with KAF16200 or similarly sized sensor. One of the best reducers would have to be 0.72x Quad Telecompressor from AP that fits a 3.5" FTF. I know that CFF is testing prototypes of 0.75x reducers dedicated for their refractors. Then there are 'mass produced' Riccardi reducers, but their quality apparently varies from model to model.
Yes I agree but its narrower field of view. I did not know that about the Riccardi reducers.

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Originally Posted by RickS View Post
Drs Jim & Linda Powell at DSW who kindly take my requests for targets and share data with me have a TEC-160FL with a SXTL-16200 camera and the combination produces some stunning results. Just sayin' Greg. Maybe 110-115 is not thinking big enough
Hehe. I had a TEC180FL for many years and yes they are a nice scope for sure.

Greg.
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  #48  
Old 14-06-2018, 06:04 AM
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Greg - a relatively fast good quality f6.3-6.5 130mm refractor combined with a nice 0.72x or 0.75x reducer will give a similar FOV to a f5-f6 4 refractor.
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  #49  
Old 14-06-2018, 02:37 PM
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Quote:
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Greg - a relatively fast good quality f6.3-6.5 130mm refractor combined with a nice 0.72x or 0.75x reducer will give a similar FOV to a f5-f6 4 refractor.
Right. Not many 130mm scopes are F6-6.5 though. Most seem to start at F7,
AP has an F6.

Greg.
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  #50  
Old 14-06-2018, 03:16 PM
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Quote:
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Right. Not many 130mm scopes are F6-6.5 though. Most seem to start at F7,
AP has an F6.

Greg.
Teleskop Express has one, if you feel the need for speed, the Imaging Start 130, in fact is f5 (FPL-53 triplet with a 3 element corrector built in) but setup for imaging only if that's ok:

https://www.teleskop-express.de/shop...Telescope.html

Very tempting.
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  #51  
Old 14-06-2018, 03:51 PM
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Quote:
Originally Posted by glend View Post
Teleskop Express has one, if you feel the need for speed, the Imaging Start 130, in fact is f5 (FPL-53 triplet with a 3 element corrector built in) but setup for imaging only if that's ok:

https://www.teleskop-express.de/shop...Telescope.html

Very tempting.
The Sky Rover I have is optically the same but has different decals.
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