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Nikon 13-30x/20-45x/25-56x MC (7mm-21mm) Zoom Eyepiece

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78 replies to this topic

#26 daniel_h

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Posted 08 December 2015 - 09:22 PM

7-21mm & 25-56x don't add up, if it were 7-21mm it would magnify 25-75x [3x zoom]

i have had & used one of the 25-75x fieldscope zooms and they are excellent for image qulaity



#27 bdcmd

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Posted 09 December 2015 - 01:05 AM

7-21mm & 25-56x don't add up, if it were 7-21mm it would magnify 25-75x [3x zoom]

i have had & used one of the 25-75x fieldscope zooms and they are excellent for image qulaity

Should be 9-21, which is a 2.333 x zoom and would produce the listed changes in magnification (e.g. 13-30, etc.) fairly closely.  Denis even mentions that the 9 mm field stop is fuzzy; never mentions a 7 mm fs.   bdc



#28 denis0007dl

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Posted 09 December 2015 - 01:47 AM

Yes, sorry, I put wrong number when making title of the thread. Zoom range is 9-21mm!


Edited by denis0007dl, 09 December 2015 - 01:49 AM.


#29 Tank

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Posted 09 December 2015 - 10:59 AM

I believe there was an older Nikon zoom with a larger range 7-21



#30 junomike

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Posted 09 December 2015 - 07:13 PM

I believe there was an older Nikon zoom with a larger range 7-21

Yes, It was the MCII Zoom.

 

Mike



#31 denis0007dl

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Posted 11 December 2015 - 05:30 PM

Second Nikon Zoom arrived  :)

Attached Thumbnails

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#32 Mike B

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Posted 13 December 2015 - 01:02 AM

My own intro to the Nikon MCII zoom came round-about. Started with a new-to-me CZJ 10mm Ortho EP, which produced ~200x in my Dob, w/ ParaCorr. Excellent images! Soon after acquiring the CZJ, i splurged (again) on my first Pentax XW, a 10mm, naturally. Was totally impressed, as it was as good as the CJZ to my eye, but wider field- and better ER! What marvelous choices to have, especially for those with an undriven scope.

 

This is when i picked up the used Nikon MCII zoom. Surprise yet again! This thing was as sharp as the other two, had at least decent ER... but the zoom aspect was killer! You could watch the sky darkening as you zoomed, the object you were viewing changing contrast, allowing you to pick THE perfect magnification! And again, that view of excellent quality, sharpness, & tone.

 

Denis, i am very much enjoying your experience with this Nikon zoom- and is very interesting, as i've wondered myself about the Baader & the Leica, sometimes tempted to try them myself- which can be an expensive experience. I believe you may well have saved me the time, trouble, and expense!

 

Enjoy those zooms!


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#33 Tank

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Posted 14 December 2015 - 04:09 PM

Denis

Great sets there 9-21 and 24 ES give you pretty much all FLs

Just need a barlow or magnifier for those higher mags

I use the 2.5x and 5x powermates they work perfectly with the Nikon zooms in mono mode!


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#34 denis0007dl

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Posted 14 December 2015 - 05:37 PM

Denis

Great sets there 9-21 and 24 ES give you pretty much all FLs

Just need a barlow or magnifier for those higher mags

I use the 2.5x and 5x powermates they work perfectly with the Nikon zooms in mono mode!

Thank you!

I use TMB and APM barlows for best results, in mono and bino use.

BTW, I also have Zeiss 25mm pair of orthos for special purpose  :)

ES are for wide field viewing, and now waiting to test and see how Nikons are good on Planets...but so far what I see, they are unexpected excellent performers to me, and I love them more and more.

I do not like uncomfortable eyepeices, but these Nikons when using with Zeiss low profile rubber eyeguards are very comfortable.



#35 Tank

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Posted 14 December 2015 - 07:37 PM

Denis the Nikons are great on planets

the scatter is minimal

i like them more on Saturn and Jupiter vs the Ethos,XW and Delos in direct comparisons

and they seemed to be close to the TMB SMC, CZJ and Pentax SMCs in planetary performance

Enjoy them 

 

Also removed that extra spinning middle part and now even more infocus might come in handy

:waytogo:


Edited by Tank, 14 December 2015 - 07:38 PM.


#36 denis0007dl

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Posted 14 December 2015 - 08:24 PM

Denis the Nikons are great on planets

the scatter is minimal

i like them more on Saturn and Jupiter vs the Ethos,XW and Delos in direct comparisons

and they seemed to be close to the TMB SMC, CZJ and Pentax SMCs in planetary performance

Enjoy them 

 

Also removed that extra spinning middle part and now even more infocus might come in handy

:waytogo:

Yes, very intresting. What I appreatiate most on eyepieces are: comfort, contrast, pinpoint stars at center, and colour rendering to be neutral/cool.

Other stuffs are tottaly irrelevant for me!

These Nikons have all what I prefeer so far, but Planets test will give me final result.

Yes, they require more back focus when adapted to 1.25" format with some standard adapters, so I removed all I could to get as much as possible back focus, without sacrifice mechanicall or optical performance. These are only one Zooms I really like very much, much more than Leica ASPH or Baaders Mk III, and I hope they will be my powerhorses many many years!



#37 denis0007dl

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Posted 14 December 2015 - 08:44 PM

For Nikon Zooms, best binoviewer is BinoVue, becasue his design of eyepeice holders, but I do not like BinoVue.

Thats only "problem" for me momentally  :grin:



#38 Tank

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Posted 14 December 2015 - 10:07 PM

here is an updated pic

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Edited by Tank, 14 December 2015 - 10:09 PM.

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#39 denis0007dl

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Posted 15 December 2015 - 12:21 AM

Looks very nice!

You also removed rotatable part???  :)

What you use for 1.25" adaptation?


Edited by denis0007dl, 15 December 2015 - 12:22 AM.


#40 Tank

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Posted 16 December 2015 - 10:45 PM

Yes i took off the rotatable part

 

as for the 1.25" well that RING that hold the rotatable part is close to being 1.25"

all i did was fill the gap between the RING and the housing where you see the chrome screw with electrical tape to that RING thickness then wrapped a ONCE AROUND it and the ring and works like a charm

see pics

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Edited by Tank, 16 December 2015 - 10:48 PM.


#41 chrisg

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Posted 29 March 2016 - 07:22 PM

Very interesting. I've been messing around with one of these. Very good contrast!

I have question -  That TINY TINY screw that holds the bottom part...What size is that?? I tried using my smallest size hex screw but it wouldn't fit. You practically need a sewing needle! Anyone here have any specs?

 

Edit: took off my glasses and realized it's not a hex screw but just a simple flat (tiny, but flat) screw. 


Edited by chrisg, 30 March 2016 - 09:06 PM.


#42 Tank

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Posted 29 March 2016 - 08:50 PM

That screw your talking about is tiny!!

i had to file my smallest flat head screw driver down

later i bought a micro screw driver set at Canadian tire

http://www.canadiant...ml#.VvswlfCs-rU

never know when you may need these!

 

Performance of these zooms are really nice

enjoy!

 


Edited by Tank, 29 March 2016 - 08:52 PM.

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#43 junomike

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Posted 30 March 2016 - 01:29 PM

That screw your talking about is tiny!!

i had to file my smallest flat head screw driver down

later i bought a micro screw driver set at Canadian tire

http://www.canadiant...ml#.VvswlfCs-rU

never know when you may need these!

 

Performance of these zooms are really nice

enjoy!

Great, Now I know where to get the necessary tool If/when i do this "mod". :grin:

 

Mike


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#44 Tank

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Posted 31 March 2016 - 06:26 AM

no probs just let me know and i will bring to the observing session



#45 Scanning4Comets

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Posted 31 March 2016 - 08:10 AM

These Nikon eyepieces look really nice!

 

I remember looking thru yours Tony and it was excellent!

 

:grin:



#46 YKSE

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Posted 09 August 2016 - 06:36 AM

Anyone can shed light on how to take out the other rotating ring after uncrewing the the small screw?

Thanks



#47 Solar storm

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Posted 09 August 2016 - 07:00 AM

You guys are going to make me spend more money!



#48 dufay

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Posted 09 August 2016 - 08:24 AM

Anyone can shed light on how to take out the other rotating ring after uncrewing the the small screw?

Thanks

 

As far as I can recall the rotatable part is held in place by the ring (with the small screw), so it should fall strait off when the ring is removed.


Edited by dufay, 09 August 2016 - 08:25 AM.


#49 YKSE

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Posted 09 August 2016 - 09:52 AM

 

Anyone can shed light on how to take out the other rotating ring after uncrewing the the small screw?

Thanks

 

As far as I can recall the rotatable part is held in place by the ring (with the small screw), so it should fall strait off when the ring is removed.

 

Sorry, nothing falls off with the small screw completely removed, don't quite see anything is affected.



#50 dufay

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Posted 09 August 2016 - 10:08 AM

The ring with the small screw is threaded, so you will have to screw it off first. Once this is done the rotatable part should fall off.


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