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New Takahashi FC-100 DZ F/8 !

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263 replies to this topic

#26 jay.i

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Posted 09 July 2019 - 01:22 PM

I wonder if they went with a large air space to get better correction than the DL. If I remember correctly, the Agema doublets also use a wide air space but are sensitive to collimation so have a robust cell to hold the elements in place, which cause them to thermally acclimate a bit slower than one would expect from a doublet. Thermal acclimation depends on a lot more than just the number of elements in the lens so it's not really a safe assumption that doublets are super fast to acclimate anyway.

It will be a challenge for me not to buy one. I can only hope they use this design for a new FC125. :)

#27 Tyson M

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Posted 09 July 2019 - 01:41 PM

I don't see anyone needing to replace their DC, DF, or DL's with this new version. Unless the non retractable dew shield limits usage some how because of strict space requirements. 

But people travel with their current Tak's all the time. The DF and DC are still lighter.

Weights of optical tubes from various websites.

 

DF: 7.9lbs
DC: 6.2 lbs

DL: 8.37lbs

DZ: 8.59lbs


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#28 Hesiod

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Posted 09 July 2019 - 01:55 PM

Well, the difference between DF and DZ is really negligible, and the DC retains its advantage only because use the fc60 focuser, which is not IMHO a strong feature, unless the buyer plan to replace the Tak focuser anyway (and in such case the advantage is likely to be lost), so they could simply offer a "visual DZ" with the FC60 focuser.
As for the DZ being a limited run, it could be just the "pilot batch": it does not make much sense to keep crafting a clearly inferior model without any obvious reason to do so.
Or it could be just their new business model to keep sales going; but even in such case the DF/DC future does not look very bright
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#29 ron scarboro

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Posted 09 July 2019 - 02:08 PM

Interesting.  Likely the same housing as the TSA-102.  

 

I personally wish they'd update their mounts with quicker slew speeds.  I'd have to sell a kidney upgrading.



#30 StarDust1

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Posted 09 July 2019 - 02:16 PM

Interesting.  Likely the same housing as the TSA-102.  

 

I personally wish they'd update their mounts with quicker slew speeds.  I'd have to sell a kidney upgrading.

No, the housing is more in line with FC-100DF, it's 95mm vs 114mm of the FS-102 and TSA-102.


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#31 John Huntley

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Posted 09 July 2019 - 02:48 PM

Are Tak production runs ever really high volume ?

 

There must be a limit to the size of the market for $2.5k 3.9 inch refractors ?



#32 waso29

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Posted 09 July 2019 - 03:11 PM

https://www.buyteles...-doublet-201319

 

https://www.takahash...-refractor.html

 

must resist contracting mutated form of takitis....

 

$28/mm is ...ugghh


Edited by waso29, 09 July 2019 - 03:17 PM.


#33 jay.i

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Posted 09 July 2019 - 03:30 PM

https://www.buyteles...-doublet-201319

 

https://www.takahash...-refractor.html

 

must resist contracting mutated form of takitis....

 

$28/mm is ...ugghh

Wow, September 2019 according to Takahashi America. Japan must be getting super first dibs. That price ($2850) before tax and shipping actually makes it an easy pass for me. It will be probably $3100-3200 after all is said and done. I just got a used DF for $1900 (and they can be regularly gotten at that price) so I see no reason I or anyone else who wants a 100mm fluorite doublet should fork over an additional grand when there will be almost no difference. Unless you MUST have the sliding dew shield, AND the seemingly tiny bit better performance.


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#34 moshen

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Posted 09 July 2019 - 04:50 PM

It looks to have a higher polychromatic strehl and less CA so I expect this is an update for imagers. It's only about 20mm shorter than the FC-100DF and .7lbs heavier. 


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#35 Daniel Mounsey

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Posted 09 July 2019 - 06:50 PM

770mm is length with dew shield retracted and 2" visual extension tube attached.

595mm if you remove 2" visual back.  It is quite compact for 100mm f/8.

 

Tammy

 

Knowing you Tammy, you'll have a pair! lol.gif



#36 Tamiji Homma

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Posted 09 July 2019 - 08:26 PM

Knowing you Tammy, you'll have a pair! lol.gif

 

Hi Daniel,

 

I am guessing Matt (Kunama) has his FC-100DZ binoscope sooner than I would :)

 

Takahashi named the new FC-100 "DZ".  

It must be the last, I mean their the best, ultimate FC-100 :)

 

Tammy


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#37 tonyt

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Posted 09 July 2019 - 08:59 PM

I think the new model makes sense - slight relaxation of the DC f ratio to help improve performance, but still a fast scope with the reducer - closer to perfect.

 

All those f7.4 scopes on the used market will be appreciated by hobbyists of lesser means :)  


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#38 Nakedgun

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Posted 09 July 2019 - 10:44 PM

Brother! My DC doesn't even have much dust on it, yet.

 

What to do, what to do....



#39 Traveler

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Posted 09 July 2019 - 11:16 PM

I am still waiting for Takahashi to bring a FS-130 or even better a FS-150 on the market. Then i will bite.



#40 Lookitup

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Posted 10 July 2019 - 12:24 AM

FC-115 to 125 doublet in light tube with fixed or DZ shield would be it for me bow.gif . Vixen Ed115s was close but didn't pop. CS


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#41 Lookitup

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Posted 10 July 2019 - 12:27 AM

Brother! My DC doesn't even have much dust on it, yet.

 

What to do, what to do....

Already cleaned my DF lens. Just like new again wink.gif  



#42 balu01

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Posted 10 July 2019 - 12:46 AM

 

 

What is not said, is this F8 will be a limited run. 

 

Is this a fact? Do you have confirmation on that?



#43 Daniel Mounsey

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Posted 10 July 2019 - 12:53 AM

Hi Daniel,

 

I am guessing Matt (Kunama) has his FC-100DZ binoscope sooner than I would smile.gif

 

Takahashi named the new FC-100 "DZ".  

It must be the last, I mean their the best, ultimate FC-100 smile.gif

 

Tammy

 

Tammy,

good news. the oak park star parties are coming back so i'll bring a DZ over so we can test it.



#44 areyoukiddingme

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Posted 10 July 2019 - 02:31 AM

Wow, September 2019 according to Takahashi America. Japan must be getting super first dibs. That price ($2850) before tax and shipping actually makes it an easy pass for me. It will be probably $3100-3200 after all is said and done. I just got a used DF for $1900 (and they can be regularly gotten at that price) so I see no reason I or anyone else who wants a 100mm fluorite doublet should fork over an additional grand when there will be almost no difference. Unless you MUST have the sliding dew shield, AND the seemingly tiny bit better performance.

Or buy from Japan?

 

https://www.kyoei-os...hi-fc100dz.html



#45 aire

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Posted 10 July 2019 - 08:32 AM

FC100-DC, DL, DF, DZ....
it could seem like Takahashi is doing experiments to see what is the best in 100mm?
in the end to pay more than for the TSA 102 that was better corrected,
or not?

#46 Terra Nova

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Posted 10 July 2019 - 08:44 AM

What is not said, is this F8 will be a limited run.”

 

Do you know that for a fact? Perhaps they are testing the waters so to speak, with this model in mind as a possible replacement model for the others.


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#47 jay.i

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Posted 10 July 2019 - 08:49 AM

I was under the impression that Kyoei was not selling to the US for 2019 because they got their wrist slapped for doing it, or something along those lines. It is a good bit cheaper... I considered it many times. I want some rings for my DF but I haven't reached out to see if they'll sell them to me yet.



#48 bobhen

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Posted 10 July 2019 - 10:02 AM

FC100-DC, DL, DF, DZ....
it could seem like Takahashi is doing experiments to see what is the best in 100mm?
in the end to pay more than for the TSA 102 that was better corrected,
or not?

Tak is trying to produce the best 100mm that is “the most profitable for them”. That means a “doublet”.

 

The TSA 102’s price was climbing and the TSA 120 was probably eating into sales of the 102 as well. And imagers gravitate to the FSQ 106. So the TSA 102 was most likely losing sales to the TSA 120 for aperture and the 106 to imagers, hence these new lines of 100mm doublets.

 

However, if "ultimate performance" is your “top” priority, the TSA 102 is one fantastic 4-inch apo refractor.

 

There was a clean TSA 102 on AM this morning for around $2,450. No need to wait for any of these doublets. Get that baby and don’t look back.

 

Bob


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#49 marcus_z

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Posted 10 July 2019 - 10:45 AM

FC100-DC, DL, DF, DZ....
it could seem like Takahashi is doing experiments to see what is the best in 100mm?
in the end to pay more than for the TSA 102 that was better corrected,
or not?

According to the published Strehl curves, the TSA-102 is better corrected than the FC-100DZ.


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#50 StarDust1

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Posted 10 July 2019 - 11:11 AM

If the FC-100DZ would be as good as the FS-102, then the FC-100DZ is an absolute winner. Looking forward to the first reviews.


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