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

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#1 denis0007dl

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Posted 04 December 2015 - 11:53 PM

After reading some comments about this Japan Zoom eyepeice, I was curious how I will like it.

When it arrive, I could not beleive that it is SO small, and VERY light! Much smaller than I tought!

Here for comparation is RKE 28mm.

 

So far, I do some testing on daytime, while night obseration will wait a bit more becasue fog and clouds.....

 

First, Zooming is somewhat stiff. Mechanic and optic finish is SUPERB and precise!

Much more precise and nicer than Baader Mk III zoom which I recently sold. 

I had a pair of Baader Mk IIIs, but did not like their weight, bulky design, and my face often touch eyepeice, even when it is screwed off upper part. Also, eye releaf for my taste, is somewhat less than I prefeer. I lke here click stop system, where I know exactly what focal lenght I have. With Nikon, you never know what FL you use.

Optically, Baader is excellent, with sharp, with not precisely circular field stop.

There is some ring on fire on Baader on edges, but MUCH less, almost none on Nikon.

 

What I like on Baader is that it provide more neutral toned image than Leica ASPH Zoom, which I also had, but did not like it yellowish tone of image, as well pronounced EOFB. Baader do not have any EOFB. On Nikon, still do not know.

Optics and mechanics finish, and precision, on Baader unit does not seems so precisely and well made like in Leica, while Nikon seems even more better!

 

Nikon provide neutral toned image, with not very sharp field stop on 21mm, while on 9mm is mushy. This actually does not bother me at all, while I most appreatiate contrast, sharpness and colour rendering.

 

To me, Nikon seems to have more chrystal view than both Baader and Leica, and sharpness and contrast are excellent.

FOV in Leica is largest, whiel on Nikon is smallest. Nikon at 21mm have approx 40 deg FOV, while on 9mm seems to have approx 55 deg FOV.

 

 

 

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#2 denis0007dl

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Posted 04 December 2015 - 11:55 PM

That is original rubber eyeguard provided with eyepiece.

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#3 denis0007dl

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Posted 04 December 2015 - 11:56 PM

This are rubber winged eyeguards from Nikon 18x70 bino, which fits perfectly on eyepeice.

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#4 denis0007dl

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Posted 04 December 2015 - 11:58 PM

This are rubber eyeguards fromZeiss microscope eyepeices, which also fits perfectly on eyepeice. I prefeer these most, becasue viewes are comfortable here, despite short eye releaf.

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#5 denis0007dl

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Posted 05 December 2015 - 12:02 AM

While eyepeice is 23mm in barell, I use use black isolating tape, and adapted it with adapter from CZJ ortho epcs.

 

All in all, excellent eyepeice for daytime observations. Unexpected light in weight and small, with excellent optics, and very cheap comparing it vs Leica ASPH Zoom. For binoviewers seems to be excellent choice!

 

Now, I wait for night time observations to see how it performs on Jupiter, Moon, stars......

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#6 junomike

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Posted 05 December 2015 - 08:45 AM

If it's anything like the Nikon 9mm - 21mm Zoom, you're going to love it!

I have a pair I use in all my scopes.

I find them as good or better than the XW/Delos (smaller FOV of course at longer F/L).

 

Nikon Zooms.jpg

 

Mike

 


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#7 junomike

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Posted 05 December 2015 - 08:54 AM

I also discovered a trick (by mistake actually).

The Nikon Zoom's didn't reach focus in my APM 100 Semi Apo's (just missed focus by a few mm's).

Ah well I though, no loss as I have other EP's for that.

Then one evening (in the dark)   I placed both Zooms in my TeleVue BV and found that one was much shorter than the other???? huh?

I soon discovered  that the 1.25" - .965" adapter had fallen off of one of the Nikon's  and I inadvertently placed it into the BV.......and it fit!

A closer look showed that the Nikon eyepiece threads (used to thread into a spotting scope) are about the same diameter of the 1.25" collets.

 

Nikon shorty.jpg

 

So then I thought, well that's a heck of a lot shorter, maybe it will now reach focus in the APM 100's?

I removed the second adapter and low and behold they do indeed reach focus in the APM 100's.

They aren't as "snug" as with the adapters but as long as you keep them flush to the collets when tightening I found no issues.

 

Mike


Edited by junomike, 05 December 2015 - 08:57 AM.

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#8 denis0007dl

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Posted 05 December 2015 - 10:48 AM

If it's anything like the Nikon 9mm - 21mm Zoom, you're going to love it!

I have a pair I use in all my scopes.

I find them as good or better than the XW/Delos (smaller FOV of course at longer F/L).

 

attachicon.gifNikon Zooms.jpg

 

Mike

Interesting input about Delos/XW comparation!



#9 denis0007dl

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Posted 05 December 2015 - 10:53 AM

I also discovered a trick (by mistake actually).

The Nikon Zoom's didn't reach focus in my APM 100 Semi Apo's (just missed focus by a few mm's).

Ah well I though, no loss as I have other EP's for that.

Then one evening (in the dark)   I placed both Zooms in my TeleVue BV and found that one was much shorter than the other???? huh?

I soon discovered  that the 1.25" - .965" adapter had fallen off of one of the Nikon's  and I inadvertently placed it into the BV.......and it fit!

A closer look showed that the Nikon eyepiece threads (used to thread into a spotting scope) are about the same diameter of the 1.25" collets.

 

attachicon.gifNikon shorty.jpg

 

So then I thought, well that's a heck of a lot shorter, maybe it will now reach focus in the APM 100's?

I removed the second adapter and low and behold they do indeed reach focus in the APM 100's.

They aren't as "snug" as with the adapters but as long as you keep them flush to the collets when tightening I found no issues.

 

Mike

Yes, I have same experience with one eyepeice putting it in one of my 1.25" adapters, trying to see whats happening!

I have even some more experiments in process how to use /adapt it best......



#10 denis0007dl

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Posted 05 December 2015 - 02:12 PM

Test done: on stars only: sky background is very dark, and stars are very tiny stars, very sharp. IMO, better than Leica or Baader Mk III zoom.

Now, waiting for Jupiter and Moon.......

So far, I am very impressed with this little Japan Zoom. I would call it ortho zoom.....



#11 junomike

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Posted 05 December 2015 - 02:40 PM

Denis, It's just as impressive on planets as it is on DSO's.

Anxiously awaiting your report!

 

Mike



#12 denis0007dl

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Posted 05 December 2015 - 02:54 PM

Could be!

 

I detect no EOFB like in Leica, which bother me. Also, Leica have yellowish tone of image, while Nikon have very neutral. Also, Nikon is VERY light, and VERY small, and thats grab"n go eyepeice, and for sure works excellent in binoviewers!

Leica and Baaders in binos: no, thank you, I sold all becasue weight and size. If we speak Leica vs Baader, I like Baader more, just becasue Baader have more neutral tone of image than Leica, and Baader do not have EOFB. Sharpness Leica vs Baader, Leica is hair better, barely visible for sure.

 

Nikons are great discovery for me for sure in Zoom world, and I like it more and more, and now I seriously thinking to get second for binos  :)



#13 denis0007dl

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Posted 05 December 2015 - 03:34 PM

I did some very usefull stuff: I remove rotatable part (this metal part does not have affect to Zooming, it is part where this eyepeice is connecting to Nikon fieldscope).

 

When removed this ring and rotatable part, I will be able to react much more back focus, and eyepeice is even more lighter and smaller. I will use wide black isolating tape to adapt it to 1.25".

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#14 junomike

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Posted 05 December 2015 - 03:43 PM

Interesting Denis.

Not sure If it would help me however as I place  the "ring/rotating threads" right into the 1.25" collets on my APM 100's.

For normal use in a BV It might prove handy.

 

Mike



#15 denis0007dl

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Posted 05 December 2015 - 04:13 PM

...done! Now eyepeice goes much deeper into 1.25"eyepeice holders!

Thats very usefull for me. Also, removed rotatable part now does not bother/confuse which pat to rotate, while two rotatable parts are close to each other, while one rotatable part does not have any function for telescopes.. Now there is only 1 rotatable part, for Zooming, and second rotatable part sometimes could be confusing, especially in dark, IMO!

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Edited by denis0007dl, 05 December 2015 - 04:25 PM.

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#16 denis0007dl

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Posted 05 December 2015 - 04:34 PM

Difference before and now, in reaching backfocuss is 1.8cm. Thats a lot!



#17 andydj5xp

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Posted 06 December 2015 - 03:20 AM

Difference before and now, in reaching backfocuss is 1.8cm. Thats a lot!

Interesting informations.

 

If I may suggest: prepare a comprehensive CN-review to not let all these infos disappear after some time in the course of new topics pouring in every day.

 

When after the first posts about the then (2009) new Leica ASPH Zoom CN's Tom Trusock encouraged me to write a detailed review reflecting my tests, experiences, and impressions. I gladly did and the Leica ASPH Zoom slowly found its way into many CNer's eyepiece collections. Without such a detailed review it's difficult to collect and evaluate all the infos about a piece of equipment.

 

Andreas


Edited by andydj5xp, 06 December 2015 - 03:22 AM.


#18 denis0007dl

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Posted 06 December 2015 - 08:27 AM

I decide to buy second Nikon for bino, and did that. Now, I prepare test Nikons vs ZAO IIs 6mm, 10mm, 16mm and Leica ASPH Zoom, in different magnifications, with best barlows, eyepieces alone and in binos.
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#19 Tank

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Posted 06 December 2015 - 01:04 PM

really love the Nikon MC zooms the range is 9-21 and about 60 to 40 degree

there performance is like a good ortho / great plossl

i prefered the this Nikon over the Delos/Ethos/Nagler zoom/XW and other for planetary work main reason is the scatter control is great

dont think it would beat out a ZAO or TMB SMC never tried

here is my bino set:

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Edited by Tank, 06 December 2015 - 01:06 PM.

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#20 denis0007dl

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Posted 06 December 2015 - 01:25 PM

really love the Nikon MC zooms the range is 9-21 and about 60 to 40 degree

there performance is like a good ortho / great plossl

i prefered the this Nikon over the Delos/Ethos/Nagler zoom/XW and other for planetary work main reason is the scatter control is great

dont think it would beat out a ZAO or TMB SMC never tried

here is my bino set:

Tank, great setup!

 

Well, I will see how close are little Nikons to ZAO IIs, as well whats difference between Nikons vs Leica ASPH Zoom on Planets and Moon!



#21 Levine

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Posted 06 December 2015 - 07:28 PM

I am watching, too...

:-)

#22 ybor

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Posted 07 December 2015 - 01:53 AM

Can you still buy these eyepieces new or are they discontinued? 

 

Thanks



#23 denis0007dl

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Posted 07 December 2015 - 02:00 AM

Can you still buy these eyepieces new or are they discontinued? 

 

Thanks

Which ones? If you means ZAO IIs, they are discounted.


Edited by denis0007dl, 07 December 2015 - 02:01 AM.


#24 ybor

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Posted 07 December 2015 - 10:12 PM

Is the Nikon zoom still made ?



#25 denis0007dl

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Posted 08 December 2015 - 03:43 AM

Of course, just Google it
http://www.ebay.com/...yQAAOSwAKxWVtbt


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