Jump to content

  •  

CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.

Photo

New Takahashi FC-100 DZ F/8 !

  • Please log in to reply
181 replies to this topic

#1 tegea

tegea

    Viking 1

  • -----
  • topic starter
  • Posts: 584
  • Joined: 29 Nov 2004
  • Loc: France

Posted 09 July 2019 - 05:06 AM

Just discovered that on the Takahashi web page : New FC-100DZ at F/8 with a sliding dewshield

It therefore stays between the FC-100 DF/DC at F/7.5 and the FC-100 DL at F/9.

 

Original page in japanese :

http://www.takahashi...9_fc-100dz.html

 

Translated page :

https://translate.go...Li4kKn9Tc0gF__Q


  • plyscope, waso29, Tyson M and 3 others like this

#2 Nakedgun

Nakedgun

    Viking 1

  • *****
  • Posts: 602
  • Joined: 30 Mar 2014
  • Loc: Southwest

Posted 09 July 2019 - 05:56 AM

So, a year to save up for the ultimate 4-inch.

 

I wonder if this is the same formula being employed by Agema Optics in their SD series fluorite doublets?

 

A couple of pounds heavier than the DC.

 

What will we do with our DC, DF, DLs?



#3 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 7,372
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 09 July 2019 - 08:00 AM

So, a year to save up for the ultimate 4-inch.

 

I wonder if this is the same formula being employed by Agema Optics in their SD series fluorite doublets?

 

A couple of pounds heavier than the DC.

 

What will we do with our DC, DF, DLs?

*Takitis symptons* bow.gif tongue2.gif

 

Well I am keeping my F9 DL. And I expect many will their DC & DFs. The F8 has 3 "new" optical and imaging accessories. If you have invested in DC, DF, DL system, there will be no appeal. 

 

BUT, if I wanted another FC, the F8 would depend on price. There may be some good pre-owned modern FCs on the market.

 

A DZ with hood retracted is 770mm long. How long is a F7.5 with the hood removed?  And why not just give one of the current 3 a retractable hood?

 

DZ is maybe the true doublet successor to TSA102.

 

 


Edited by 25585, 09 July 2019 - 08:12 AM.

  • warmbear likes this

#4 waso29

waso29

    Apollo

  • *****
  • Posts: 1,478
  • Joined: 12 May 2010
  • Loc: Chi-Town, mother earth

Posted 09 July 2019 - 08:02 AM

"What will we do with our DC, DF, DLs?"

 

surely, for prospective buyers, this is "DizZying"

maybe fc128 f8 around the corner too? praying.gif


Edited by waso29, 09 July 2019 - 08:03 AM.

  • StarDust1 likes this

#5 jay.i

jay.i

    Mercury-Atlas

  • *****
  • Posts: 2,754
  • Joined: 11 Jun 2017
  • Loc: Minneapolis, MN

Posted 09 July 2019 - 08:06 AM

"What will we do with our DC, DF, DLs?"

 

surely, for prospective buyers, this is "DizZying"

maybe fc128 f8 around the corner too? praying.gif

We can only dream... of course I just bought a used DF! Not sure I will sell it for the DZ but.... man......  I want it.


Edited by jay.i, 09 July 2019 - 08:08 AM.

  • Daniel Mounsey, Tyson M and 25585 like this

#6 bobhen

bobhen

    Soyuz

  • *****
  • Posts: 3,611
  • Joined: 25 Jun 2005

Posted 09 July 2019 - 08:14 AM

100mm is too close to my Tak TSA 120 but a light, compact 90mm doublet at F6.5 – 7, which would have the same color/performance specs as this 100DZ would really get my attention. Tak would also then have something that would compete or be an alternative to the AP and CFF 92mm triplets.

 

Bob



#7 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 7,372
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 09 July 2019 - 08:30 AM

100mm is too close to my Tak TSA 120 but a light, compact 90mm doublet at F6.5 – 7, which would have the same color/performance specs as this 100DZ would really get my attention. Tak would also then have something that would compete or be an alternative to the AP and CFF 92mm triplets.

 

Bob

I quite agree. An 85-90mm fluorite travel scopes is where Takahashi could score over Vixen maybe, but could risk their 75s.

 

However if the DZ becomes the only FC100, a FC90 would benefit in sales.



#8 StarDust1

StarDust1

    Viking 1

  • *****
  • Posts: 897
  • Joined: 21 Aug 2012

Posted 09 July 2019 - 08:35 AM

That’s good news! What are the specification of the new scope with the dew shield retracted?


Edited by StarDust1, 09 July 2019 - 08:36 AM.


#9 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 7,372
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 09 July 2019 - 08:38 AM

That’s good news! What are the specification of the new scope with the dew shield retracted?

On the page linked to, 770mm. 


  • StarDust1 likes this

#10 Tamiji Homma

Tamiji Homma

    Skylab

  • *****
  • Posts: 4,273
  • Joined: 24 Feb 2007
  • Loc: California, USA

Posted 09 July 2019 - 08:51 AM

That’s good news! What are the specification of the new scope with the dew shield retracted?

 

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


  • Daniel Mounsey, Terra Nova, StarDust1 and 2 others like this

#11 rerun

rerun

    Viking 1

  • *****
  • Posts: 672
  • Joined: 22 Mar 2009

Posted 09 July 2019 - 08:59 AM

So, a year to save up for the ultimate 4-inch.

 

I wonder if this is the same formula being employed by Agema Optics in their SD series fluorite doublets?

 

A couple of pounds heavier than the DC.

 

What will we do with our DC, DF, DLs?

I will hold my FC100DF and will be happy with in,but the FC100DZ sounds very good. A new  FOA100 would make me nervous wink.gif

 

Clear skies Markus



#12 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 7,372
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 09 July 2019 - 09:12 AM

A FOA90. Now that would be sweet. 


  • rerun, Sasa and db2005 like this

#13 Axunator

Axunator

    Viking 1

  • *****
  • Posts: 695
  • Joined: 23 May 2015
  • Loc: Helsinki, Finland

Posted 09 July 2019 - 09:21 AM

Well thanks a lot Takahashi, now I know how to spend my tax return money next year lol.gif



#14 StarDust1

StarDust1

    Viking 1

  • *****
  • Posts: 897
  • Joined: 21 Aug 2012

Posted 09 July 2019 - 09:23 AM

Thanks, this means when the dew shield is retracted the new FC-100DZ is 30mm longer then the FS-102NSV, at least according to the manual.

http://www.trutekast...2nsv_manual.pdf

#15 Heywood

Heywood

    Apollo

  • -----
  • Posts: 1,143
  • Joined: 03 Jan 2009

Posted 09 July 2019 - 09:35 AM

So, a year to save up for the ultimate 4-inch.

 

I wonder if this is the same formula being employed by Agema Optics in their SD series fluorite doublets?

 

A couple of pounds heavier than the DC.

 

What will we do with our DC, DF, DLs?

 

Takahashi says the intro date is "July 20."  I think that means July 20, 2019. 


  • 25585 likes this

#16 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 7,372
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 09 July 2019 - 09:50 AM

Takahashi says the intro date is "July 20."  I think that means July 20, 2019. 

My interpretation too, especially as the prices are up already ¥245,000 excluding tax. This is the DL "3rd 

run" IMO. No more DLs, but the more imaging friendly DF/DC may stay, like 60s & 75s in their various forms.

 

Who has pre-ordered already?!



#17 balu01

balu01

    Ranger 4

  • *****
  • Posts: 387
  • Joined: 04 May 2016
  • Loc: Las Vegas NV

Posted 09 July 2019 - 10:05 AM

My interpretation too, especially as the prices are up already ¥245,000 excluding tax. This is the DL "3rd
run" IMO. No more DLs, but the more imaging friendly DF/DC may stay, like 60s & 75s in their various forms.

Who has pre-ordered already?!


I have
  • Paulimer and 25585 like this

#18 Bill Barlow

Bill Barlow

    Skylab

  • *****
  • Posts: 4,484
  • Joined: 03 Dec 2007
  • Loc: Overland Park KS

Posted 09 July 2019 - 10:33 AM

I can’t imagine you would see much of a difference visually between this new DZ compared to the current Tak 100mm f/7.4 DC/DF and f/9 DL doublets.  Main difference is the sliding dew shield option.

 

Bill



#19 StarDust1

StarDust1

    Viking 1

  • *****
  • Posts: 897
  • Joined: 21 Aug 2012

Posted 09 July 2019 - 10:41 AM

If there is difference then it would be very subtle. One might see it in side by side when the seeing is excellent.

#20 Terra Nova

Terra Nova

    ISS

  • *****
  • Posts: 21,209
  • Joined: 29 May 2012
  • Loc: Middle Earth

Posted 09 July 2019 - 10:54 AM

Just discovered that on the Takahashi web page : New FC-100DZ at F/8 with a sliding dewshield

It therefore stays between the FC-100 DF/DC at F/7.5 and the FC-100 DL at F/9.

 

Original page in japanese :

http://www.takahashi...9_fc-100dz.html

 

Translated page :

https://translate.go...Li4kKn9Tc0gF__Q

As an owner of both the Fluorite FC60 and FC80 (both also F8), I think that’s fantastic news.


  • Sasa likes this

#21 John Huntley

John Huntley

    Vanguard

  • *****
  • Posts: 2,360
  • Joined: 16 Jul 2006
  • Loc: SW England

Posted 09 July 2019 - 11:00 AM

Interesting development.

 

I tend to think that this new model signals definitely that no more DL's will be made and possibly that the F/7.4's might be phased out in due course to leave this single F/8 FC100 model.

 

The sliding dew shield is a nice touch smile.gif

 

I'll see if I can borrow one to try against my FC100-DL grin.gif


Edited by John Huntley, 09 July 2019 - 11:52 AM.

  • rerun, Terra Nova, Tyson M and 1 other like this

#22 Tyson M

Tyson M

    Skylab

  • *****
  • Posts: 4,120
  • Joined: 22 Jan 2015
  • Loc: Alberta, Canada

Posted 09 July 2019 - 12:43 PM

The FS102 lives again!  Interesting development. 

 

Here is the comparisons combined into one image.

 

The DZ looks a bit tighter.  Not sure how that's possible but we would all be speculating.

 

Edit: this is what the webpage says on the matter "The chromatic aberration is reduced by combining it with a high refractive glass that is compatible with partial dispersion, even for lenses combined with flow light.

As a result, the strair intensity is 90% or more and 97.6% in terms of strrail ratio with visual intensity over the entire visible light region of 460 nm to 670 nm, and the aperture performance ratio of f / 8 over f / 9 FC-100DL"

 

DL-DZcomparison.jpg


Edited by Tyson M, 09 July 2019 - 12:47 PM.

  • Fomalhaut, Heywood, Terra Nova and 3 others like this

#23 Hesiod

Hesiod

    Gemini

  • *****
  • Posts: 3,472
  • Joined: 13 Jan 2013

Posted 09 July 2019 - 12:52 PM

I think too that the DC/DF will be discontinued: the DZ is just too close in focal length and overall size to justify their existence, and the published specs for the new model show it to be a clearly better option for imaging.

And for sure, given the DZ specs, I do not see the point for further DLs; but, if the new matching glass works as advised, a 5" doublet could be a closer to come in being as cheaper (and hopefully lighter) alternative to TOA.

 

Maybe it is time to start culling the herdlol.gif



#24 Tyson M

Tyson M

    Skylab

  • *****
  • Posts: 4,120
  • Joined: 22 Jan 2015
  • Loc: Alberta, Canada

Posted 09 July 2019 - 12:55 PM

Yea none of the models make sense - except maybe the DC for its lightest weight.  But even then, it does look like this can replace all of them, since the FZ will have the shortest length for portability (the TSA102S was small too).  

 



#25 25585

25585

    Fly Me to the Moon

  • *****
  • Posts: 7,372
  • Joined: 29 Aug 2017
  • Loc: In a valley, in the UK.

Posted 09 July 2019 - 01:21 PM

I think too that the DC/DF will be discontinued: the DZ is just too close in focal length and overall size to justify their existence, and the published specs for the new model show it to be a clearly better option for imaging.

And for sure, given the DZ specs, I do not see the point for further DLs; but, if the new matching glass works as advised, a 5" doublet could be a closer to come in being as cheaper (and hopefully lighter) alternative to TOA.

 

Maybe it is time to start culling the herdlol.gif

No culling, just more collecting.

 

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




CNers have asked about a donation box for Cloudy Nights over the years, so here you go. Donation is not required by any means, so please enjoy your stay.


Recent Topics






Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics