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Takahashi fc100dz, 100dl or fs102

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#1 bockos

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Posted 02 April 2020 - 09:24 PM

Hi, which of the three top doublet fluorite refractors is the best in termes of contrast, sharpness, higher magnifications and finer details on jupiter for example. Which is the best visual instrument? Thanks in advance!



#2 sunnyday

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Posted 02 April 2020 - 09:51 PM

here's what takahashi say about their telescopes

I hope it can help you.

I ordered the 100mm dz.

I think you can't go wrong with a tack no matter which model you choose.

 

 

DESCRIPTION
Like the FS series, the FC series are apochromatic refractors with two-element fluorite lenses.  The FC series have larger apertures and longer focal lengths than the FS series, and provide outstanding performance both for the visual observer and the digital imager.  The FC series has its own dedicated set of reducers and flatteners, and is also able to use some of these accessories from the TOA series.

 

FC-100D

 

The FC-100D series consists of an apochromatic fluorite Steinheil doublet with a 100 mm objective diameter.  Two focal lengths are available:  a 740 mm f/7.4 instrument, and a 900 mm f/9.0 instrument.  The front element uses an eco-glass for maximum light transmission, with a coated fluorite rear element for superb color correction.

 

FC-100DC

 

The FC-100DC model features a fixed dew shield and a 2.2 inch rack and pinion focuser.  While a capable imaging instrument, it is designed with the visual observer in mind.

 

FC-100DF

 

The FC-100DF is optically identical to the DC model, but features an enhanced 2.7–inch focuser.  It also features a shorter tube length that provides additional back focus for digital imaging applications.  This added back focus allows use of the FC-35RD reducer, which converts the DF to an f/5.4 instrument.

 

FC-100DL

 

The FC-100DL is a full-fledged long focal length apochromatic refractor from Takahashi. This is the same FC-100DL that was offered in limited quantities in previous years. With the exception of the focal length, it is identical to the FC-100DF.


Edited by sunnyday, 02 April 2020 - 09:53 PM.

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#3 Kunama

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Posted 03 April 2020 - 12:03 AM

Just a correction to the above:  the DF and DL have 2.5" focusers, not 2.7".  


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#4 Disciplus55

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Posted 03 April 2020 - 01:52 AM

Get a DL or a DZ if available where you are, you cannot go wrong with either one. Would it be a bit too expensive and you see a nice second hand FS102, grab it. Recent FC100 are thinner and lighter...


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#5 RogerLaureys

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Posted 03 April 2020 - 08:47 AM

I have a DZ and I must say I am absolutely flabbergasted with the optical quality, sharpness and contrast of this telescope. It has only 10 cm aperture but behaves like a far bigger telescope.

I am becoming a Takahashi addict grin.gif 


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#6 sunnyday

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Posted 03 April 2020 - 08:49 AM

I have a DZ and I must say I am absolutely flabbergasted with the optical quality, sharpness and contrast of this telescope. It has only 10 cm aperture but behaves like a far bigger telescope.

I am becoming a Takahashi addict grin.gif

I am happy to learn this, I have one on order.
thank you.


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#7 Hesiod

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Posted 03 April 2020 - 10:01 AM

Hi, which of the three top doublet fluorite refractors is the best in termes of contrast, sharpness, higher magnifications and finer details on jupiter for example. Which is the best visual instrument? Thanks in advance!

IMHO, whichever one has the best overall optical accuracy...there are differences between the designs, but IME these differences are subtle and think that an outstanding DF would perform better than an "average" DL, and vice-versa.

Between two outstanding samples, I believe that the bottleneck will be our own eyes.

 

Personally have both the DL and DF and, despite having developed a preference for the views in the former after having used the two side by side for several nights, I keep using more often the latter because is much more manageable and far from being "shabby".

I never ever saw something in the DL I was not able to see in the DF as well, and both are very sharp.

To my eye, the difference is a subtly wider palette in the DL especially among whites.

 

Said so, since the DL has been phased out by a couple of years and think the DF will follow briefly, I would get the DZ, and more so if think to be interested in deep sky AP in the near future as I believe that chances for an optimized field flattener are higher for this model (the reducer for the DF I own could use an upgrade...)


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#8 mikeDnight

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Posted 03 April 2020 - 11:11 AM

I initially bought the DC in 2015 and later had three opportunities to change to a DL, but I didn't.. Having used several DL's, I can tell you they are stunningly good scopes. However, just like Alberto above, I have never seen anything in the DL that wasn't just as easily visible in the DC. What did stand out to me in side by side comparison between the DL and DC,  was just howmuch easier the shorter DC was to handle on a GP mount. There isn't a lot of difference in physical length, but its enough to make reaching the mount controls an issue, and the arc made by the eyepiece means that with the shorter scope, you hardly have to alter you position and so is very comfortable to use.

 The DL has a slightly cooler tone than the DC but other than that there is no difference in ability. The DC at F7.4 will still give stunning views of the Moon and double stars at 463X in my Vixen 1.6mm HR eyepiece, so the optics at truly top class.

 I've owned and used many top end refractors, some much larger than the DC, but none have given me as much joy. These 100mm Tak's are powerhouses and pack a punch far beyond their aperture class, not just on the Moon and planets but also on DSO's.

 When Takahashi brought out the new DZ I was very interested, as this scope is reportedly even cooler than the DL, yet it is significantly shorter than the DL, and has a retractable dew shield. I couldn't resist! Mine is currently on a slow boat from Japan and won't be with me for some time, but I'm seriously excited about this DZ design as I love the cool view. 

 Whichever FC100D you eventually go for you will definitely not be disappointed. They are all simply stunning!


Edited by mikeDnight, 03 April 2020 - 11:15 AM.

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#9 coopman

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Posted 03 April 2020 - 12:36 PM

Here is Takahashi's description of the FC100DZ:

 

The FC-100DZ is a fluorite doublet with a 100 mm aperture and an 800 mm focal length.   In this doublet design, Takahashi has paired the fluorite element with a low dispersion glass having a high refractive index.  This combination provides excellent optical performance across the entire visible spectrum with a Strehl ratio in excess of 97.6% across this range.  In addition, to satisfy the increasing demands of today’s imaging system, this glass combination minimizes the blue halo sometimes present at shorter wavelengths.  This halo intensity is reduced by about 50% when compared to the existing FC-100D.


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#10 Tyson M

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Posted 03 April 2020 - 12:45 PM

Scotch, whisky or burbon?

 

Lol get whichever one is available and within your budget.


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#11 donadani

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Posted 03 April 2020 - 01:47 PM

you should add the Vixen (Celestron, Orion, Tasco, Bresser) FL-102S to that pack :)



#12 marcus_z

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Posted 03 April 2020 - 02:05 PM

Since you did not mention color correction, add the 107FL to the list *g*

#13 YAOG

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Posted 03 April 2020 - 02:42 PM

Hey Dr.D is streaming LIVE on the WHCT YouTube pagE He is talking about all things Takahashi! Go NOW!


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#14 25585

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Posted 03 April 2020 - 02:49 PM

Scotch, whisky or burbon?

 

Lol get whichever one is available and within your budget.

Irish! Neat or with crushed ice. No soda.

 

Baileys with ice is great too.   


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#15 sunnyday

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Posted 03 April 2020 - 02:50 PM

Hey Dr.D is streaming LIVE on the WHCT YouTube pagE He is talking about all things Takahashi! Go NOW!

I can not find it



#16 rustynpp

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Posted 03 April 2020 - 02:51 PM

I can not find it

https://www.youtube....h?v=2Ki7pRSAHxU


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#17 sunnyday

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Posted 03 April 2020 - 03:07 PM

thank you so much.



#18 Tyson M

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Posted 03 April 2020 - 04:19 PM

Now is this time to buy a new Tak!  Only until April 6th



#19 bockos

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Posted 03 April 2020 - 05:30 PM

Thanks for the very useful comments.

How fs102 is compared to 100dz since the two are f/8



#20 sunnyday

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Posted 03 April 2020 - 05:45 PM

I don't think the difference is seen in the eye, it's too subtle in my opinion.



#21 John Huntley

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Posted 03 April 2020 - 05:55 PM

How many DL's are still available to be bought new ?

 

Once the 2nd run of 100 have sold out they won't be making any more as far as I know.



#22 marcus_z

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Posted 03 April 2020 - 06:15 PM

My second run DL has a serial number above 100. I highly doubt there are only 200 copies.

Edited by marcus_z, 03 April 2020 - 06:15 PM.


#23 daquad

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Posted 03 April 2020 - 07:00 PM

https://www.highpoin...-mef-3-tfk10210



#24 Jsquared

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Posted 03 April 2020 - 08:29 PM

The dc and df are the same optics. The df fits 2”focuser dc requires adapter

 

the dL is f9 and longer not as portable better than above optics slightly

 

the dz is the best corrected and is the one I’d get if buying now esp if imaging in your future

 

the dc is the lightest and cheapest and the optics aren’t bad

 

they are on sale till the 6th hurry

 

they all are good though


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#25 m9x18

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Posted 03 April 2020 - 09:38 PM

Spoke to Texas Nautical. While DL production is over, there are still a couple of new ones for sale. 




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