Nagler 17mm T4 vs Nagler 16mm T2 
Author Message
 Nagler 17mm T4 vs Nagler 16mm T2

Has anyone in the group done a careful comparison of these two
eyepieces?  I wonder how they compare for edge sharpness and that
"spacewalk" effect.

Richard



Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2
Hi Richard,

I have both and have compared them in a couple of different scopes.

The 17mm Nagler is my favorite of the new type 4's, and has better contrast and
slightly better edge sharpness than the 16mm. The 17mm also has more eye
relief, though almost to much if you don't wear glasses. Also the 17mm has a
slight bit of the dreaded "kidney bean" effect if you get your eye to close to
the eye lens.

The 16mm offeres a bit more of that spacewalk feel, no kidney bean effect, and
can be used in both 1-1/4" and 2" focusers.
The 17 can only be used in a 2".

I think that the 16mm may be a tad sharper on axis, but gives away some edge
sharpness to the 17mm. It is obvious the 17mm has the better coatings when
comparing the two.

The 17mm is big and heavy compared to the 16mm. The 16 to me gives more of that
spacewalk feel, but it's really a close call.

If you wear glasses, the 17mm is really the best choice. If you don't, it's a
lot closer.

Richard Whalen

Quote:
>Has anyone in the group done a careful comparison of these two eyepieces?  I

wonder how they compare for edge sharpness and that "spacewalk" effect.>


Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2
Hi Richard,

Thanks for your reply.  Have you compared the Nagler 22mm T4 with the Nagler 20mm
T2 and the Nagler 12mm T4 with the Nagler 12mm T2 and/or the Nagler 13mm?

Quote:

> Hi Richard,

> I have both and have compared them in a couple of different scopes.

> The 17mm Nagler is my favorite of the new type 4's, and has better contrast and
> slightly better edge sharpness than the 16mm. The 17mm also has more eye
> relief, though almost to much if you don't wear glasses. Also the 17mm has a
> slight bit of the dreaded "kidney bean" effect if you get your eye to close to
> the eye lens.

> The 16mm offeres a bit more of that spacewalk feel, no kidney bean effect, and
> can be used in both 1-1/4" and 2" focusers.
> The 17 can only be used in a 2".

> I think that the 16mm may be a tad sharper on axis, but gives away some edge
> sharpness to the 17mm. It is obvious the 17mm has the better coatings when
> comparing the two.

> The 17mm is big and heavy compared to the 16mm. The 16 to me gives more of that
> spacewalk feel, but it's really a close call.

> If you wear glasses, the 17mm is really the best choice. If you don't, it's a
> lot closer.

> Richard Whalen

> >Has anyone in the group done a careful comparison of these two eyepieces?  I
> wonder how they compare for edge sharpness and that "spacewalk" effect.>



Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2


Quote:
> Hi Richard,

> I have both and have compared them in a couple of different scopes.

> The 17mm Nagler is my favorite of the new type 4's, and has better
contrast and
> slightly better edge sharpness than the 16mm. The 17mm also has more eye
> relief, though almost to much if you don't wear glasses. Also the 17mm has
a
> slight bit of the dreaded "kidney bean" effect if you get your eye to
close to
> the eye lens.

> The 16mm offeres a bit more of that spacewalk feel, no kidney bean effect,
and
> can be used in both 1-1/4" and 2" focusers.
> The 17 can only be used in a 2".

> I think that the 16mm may be a tad sharper on axis, but gives away some
edge
> sharpness to the 17mm. It is obvious the 17mm has the better coatings when
> comparing the two.

> The 17mm is big and heavy compared to the 16mm. The 16 to me gives more of
that
> spacewalk feel, but it's really a close call.

> If you wear glasses, the 17mm is really the best choice. If you don't,
it's a
> lot closer.

> Richard Whalen

Hi Richard,

Can you tell us what scopes they were compared in?

Thanks,

Dave



Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2
Hi Dave,

Several. Lets see, I've done it in the following:

8" f15 MCT (Intes Micro)
8" f11 MCT (TEC)
4" f 8 APO (TMBack) The 17mm is awesome in this scope!
6" f7 APO  AP
9.25" SCT Celestron

Richard Whalen

IDEAS of florida
Innovative Design & Engineering Associated Services

"Time spent observing the heavens is not deducted from your lifespan"



Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2
Hi Richard,

The 20mm Nagler has better edge sharpness than the 22mm, and gives more of that
"spacewalk effect" though the 22mm beats it in every other way.

The 12mm type 4 beats the older 12mm in every way except "on axis sharpness"
and
the dreaded "kidney bean effect". It actually seems more of a cross between the
12mm type 2 and the 13mm.

 The biggest difference I see between the type 4's and the older models is more
eye relief and much better coatings. The Type 4's have excellent contrast, with
no ghosting or flaring.

Quote:
>Thanks for your reply.  Have you compared the Nagler 22mm T4 with the Nagler

20mm >T2 and the Nagler 12mm T4 with the Nagler 12mm T2 and/or the Nagler 13mm?

My own Nagler lineup after buying and  testing these eyepieces is going to be:

4.8 Nagler (Japan)
9 Nagler    (Japan)
11 Nagler  (Japan)
12 Nagler type 2 (Japan)
13 Nagler (Japan)
16 Nagler (Japan)
17 Nagler type 4 (Tiawan)
20 Nagler (Japan)
maybe the new 31 Nagler. (Heaven) :-)?

Of coarse your results may vary.....

Richard Whalen

IDEAS of florida
Innovative Design & Engineering Associated Services

"Time spent observing the heavens is not deducted from your lifespan"



Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2

Quote:
>My own Nagler lineup after buying and  testing these eyepieces is going to be:

>4.8 Nagler (Japan)
>9 Nagler    (Japan)
>11 Nagler  (Japan)
>12 Nagler type 2 (Japan)
>13 Nagler (Japan)
>16 Nagler (Japan)
>17 Nagler type 4 (Tiawan)
>20 Nagler (Japan)
>maybe the new 31 Nagler. (Heaven) :-)?

I take it you're not a barlow fan.....


Wed, 10 Apr 2002 03:00:00 GMT
 Nagler 17mm T4 vs Nagler 16mm T2
Not with Naglers. They already have one built in Barlow, add another and you
start looking through an awful lot of glass.

Richard

Quote:
>I take it you're not a barlow fan.....



Wed, 10 Apr 2002 03:00:00 GMT
 
 [ 8 post ] 

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