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Takahashi FC-100d vs Takahashi FC-100DL differences?

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#1 macmann

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Posted 26 March 2020 - 09:39 AM

I have a FC-100D telescope.   Has it been replaced with the DL model?  What are the differences between the two? 



#2 macmann

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Posted 26 March 2020 - 09:46 AM

I just found this on Google for anyone interested. 

 

 

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 is an f/7.4 instrument that 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 classic f/9 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.


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#3 25585

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Posted 26 March 2020 - 10:03 AM

DF, DL & DZ have a 2.5" focuser. The TSA series have 2.7" focusers.

 

This size difference is important for buying accessories, and microfocusers.

 

The DL F9 & DZ F8 also use different extenders to DC & DF F7.4.



#4 John Huntley

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Posted 27 March 2020 - 12:27 PM

The DL production was limited to two runs of 100 units each.

 

No more will be made as far as I am aware.



#5 ryderc1

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Posted 27 March 2020 - 12:40 PM

Who would have ever thought that a 4" Tak would be rarer than an AP Stowaway!


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#6 helpwanted

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Posted 27 March 2020 - 12:47 PM

I just found this on Google for anyone interested. 

 

 

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 is an f/7.4 instrument that 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 classic f/9 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.

There also is the new DZ, which uses the 2.7" focuser & the focal length is 800mm, f8.



#7 StarDust1

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Posted 28 March 2020 - 04:34 PM

There also is the new DZ, which uses the 2.7" focuser & the focal length is 800mm, f8.

The new DZ has 2.5" focuser, the same as FC-100DF or Sky-90. The FS-102, TSA-102, TSA-120 has the 2.7" focuser.


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#8 John Huntley

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Posted 29 March 2020 - 05:03 AM

The new DZ has 2.5" focuser, the same as FC-100DF or Sky-90. The FS-102, TSA-102, TSA-120 has the 2.7" focuser.

The DL uses the Sky-90 focuser as well.


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#9 Hesiod

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Posted 29 March 2020 - 09:12 AM

The DL has a 100/900 objective, while the DF/DC have a 100/740 one; in my agenda, having different focals makes for a rather large differencelol.gif

Said so, the most striking difference is about size: the DL is noticeably larger and more cumbersome than the DF.

Optically I think that the main source of difference would be the inter-samples variability: if observe with them side by side the DL shows a tad richer palette and, to my eye, a better saturation of certain colors.

I never detected any difference in term of solved details but personally tend to like more the picture shown by the DL (even if use more often the DF because is more convenient to set up and, to avoid misunderstandings,I clarify that the difference I seeare subtle at best).


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#10 Erik Bakker

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Posted 29 March 2020 - 09:14 AM

The DL has a 100/900 objective, while the DF/DC have a 100/740 one; in my agenda, having different focals makes for a rather large differencelol.gif

Said so, the most striking difference is about size: the DL is noticeably larger and more cumbersome than the DF.

Optically I think that the main source of difference would be the inter-samples variability: if observe with them side by side the DL shows a tad richer palette and, to my eye, a better saturation of certain colors.

I never detected any difference in term of solved details but personally tend to like more the picture shown by the DL (even if use more often the DF because is more convenient to set up and, to avoid misunderstandings,I clarify that the difference I seeare subtle at best).

waytogo.gif bow.gif



#11 25585

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Posted 29 March 2020 - 09:48 AM

Waiting for Daniel Mounsey's big shoot-out, when such things are possible again.




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