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18mm Radian.....

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#1 Scanning4Comets

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Posted 04 May 2013 - 11:02 AM

Like to know what you think of this eyepiece. Looking for thoughts from people who have actually owned this and tried it...not speculation like : "Well I don't own this but..."

Trying to fill a gap between a 28mm ES and 10mm XW. Right now it looks like a 17mm Vixen LVW or an 18mm Radian will be replacing my 22mm Vixen LVW, which I am trying to trade ONLY for a 17mm LVW or 18mm Radian because one of these two will fit nicely between my 28mm ES 68, which is on the way, and my 10mm Pentax XW.

Cheers!

#2 george tatsis

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Posted 04 May 2013 - 12:47 PM

It's very sharp to the edge, like the whole line of course.I use it mostly for nebulae and galaxies with no complaints whatsoever.

I don't know how many Radian followers are still out there , but I for one remain a very fervent one! :grin:

George

#3 Jay_Bird

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Posted 04 May 2013 - 01:24 PM

Me too George. But I can't help Markus firsthand as I only have a few from 6mm to 14mm, all keepers.

#4 Wallcreeper

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Posted 04 May 2013 - 01:26 PM

It was my first high quality eyepiece and still one of my most used ones. I've had it for about 2 years now. It is very sharp and gives me an exit pupil of 3mm, which I happen to like observing at. You can get it used for about $150, which I think is a great deal.

#5 Hamsterdam

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Posted 04 May 2013 - 01:27 PM

I have noticed Radians selling for much lower prices than Naglers on ebay. I know Naglers have a wider APOV, but are they that vastly superior?

#6 george tatsis

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Posted 04 May 2013 - 02:33 PM

I have noticed Radians selling for much lower prices than Naglers on ebay. I know Naglers have a wider APOV, but are they that vastly superior?


I find the Radian design sharper than the Nagler one and superior to the latter as well. The 82* FOV means nothing to me because the shorter eye relief of most Naglers does not allow one to enjoy the whole FOV. You always get the feeling that you are missing something.

The Radian on the other hand is a pleasure to view through, as it is sharper, flatter and let's not forget the abundance of focal lengths (3mm,4mm,5mm,6mm,8mm,10mm,12mm,14mm and 18mm) :jump:

George

#7 Scanning4Comets

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Posted 04 May 2013 - 04:52 PM

Thanks guys,

I'm going to trade my 22mm Vixen LVW for one of the two I mentioned, (A 17mm Vixen LVW or an 18mm Radian).

Cheers,

#8 bdcmd

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Posted 04 May 2013 - 07:22 PM

Count me in as another unabashed fan of the Radian line. I use them frequently for extended viewing, due to the long, very comfortable eye relief. In general, I find them very sharp, edge to edge, in my scopes, which are all longish f/l compared to yours, but TV eyepieces are known to be well corrected down to f/4 or so. I also like the Instajust, never really had any problem with it, once I got used to the feel of it. For your purposes, I would think either would work. The LVW is slightly wider fov, the Radian should be cheaper, and easier to find used, I would think. Of all my Radians, I use the 18, 5 and 6 the most. The 18 works really well in Stellarvue F50 and F60 finders, also.

#9 GeneT

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Posted 04 May 2013 - 07:37 PM

I owned one, and it is fine. Delos makes a 17.3 that you might consider. The 17 Nagler is also an excellent eyepiece.

#10 bremms

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Posted 04 May 2013 - 08:47 PM

My 6mm Radian and 8mm Radian are far better then the Vixen LV's I used to have. They are great eyepieces

#11 Mirzam

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Posted 05 May 2013 - 06:36 AM

I've owned two 18 mm Radians. I think it is the best eyepiece of the Radian series. Very compact with good optical performance. You could spend a lot more and get a 17.3 mm Delos and it will be better. But the Radian 18 mm is a fine eyepiece.

JimC

#12 Pinbout

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Posted 05 May 2013 - 08:38 AM

I had one, it was a great eyepiece. but I didn't use it a lot because I would barlow my 35mm finder eyepiece then increase mag from there, so I wound up skipping that eyepiece a lot.

if I had two for my binoviewer, that would be a different story.

#13 Scanning4Comets

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Posted 05 May 2013 - 11:12 AM

You could spend a lot more and get a 17.3 mm Delos and it will be better.


I have tried one in my fast scope. Edges are not good. I don't use a Paracorr, and I don't plan on getting one, so this EP is out for me. The Radian or the 17mm LVW will be better edge-wise, hence the reason I only mentioned the two for my scope. I know the Delos will have better throughput, but I don't want to spend any $$$. I am only trading my 22mm LVW as I said in my OP.

I owned one, and it is fine. Delos makes a 17.3 that you might consider. The 17 Nagler is also an excellent eyepiece.


17mm Nag T4 is completely out of the question as it costs too much and I would need a Paracorr for it to perform right in my scope. I tried one and it was not happening.

Thanks for the tips though! They are always appreciated! :waytogo:

Cheers,

#14 coopman

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Posted 05 May 2013 - 06:01 PM

The Hyperion 17mm is a good eyepiece also.

#15 Scanning4Comets

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Posted 05 May 2013 - 07:04 PM

The Hyperion 17mm is a good eyepiece also.

--------------------
Regards,
Clay


Hi Clay,

I've owned this one also. While it has excellent eye relief and a fairly good central area, the edge in a fast scope wasn't good at all, so this one is out of the question too.

It looks like only a 17mm Vixen LVW or an 18mm Radian with be picked!

Thanks anyways,

Cheers,

#16 Rocketlawnchair

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Posted 06 May 2013 - 01:36 PM

I love mine, it's one of my most used eyepieces.

A number of people seem to dislike the insta-adjust, but I never use it because I view with my glasses on, so it stays flush.

#17 WesC

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Posted 06 May 2013 - 07:16 PM

Radians are great. I have a 6mm and really like it. And I compared it directly with a 6mm Delos and found it to be very nearly equal in sharpness and contrast... for half the cost!

#18 Jeff Gardner

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Posted 07 May 2013 - 03:26 PM

The Radian series are great eyepieces, I wear eyeglasses and own most of the focal lengths. Another option would be a 68* 19mm Panoptic, one of the nicest in the series and readily available in the used market.

#19 george tatsis

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Posted 07 May 2013 - 04:25 PM

Radians are great. I have a 6mm and really like it. And I compared it directly with a 6mm Delos and found it to be very nearly equal in sharpness and contrast... for half the cost!


Have them all, and never get tired of praising them !

Regardless of what some people say, my tests show that when it comes to observing atmospheric features on Jupiter, whether it be Delos, Ethos, XWs,or less glass eyepieces, none of them beat the Radians or TV plossls. :grin:

My 7mm XL gets out of the case only when Saturn monopolizes the night sky. ;)

George

#20 great_bear

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Posted 07 May 2013 - 04:41 PM

I do like it - but I also wish it didn't make the moon look like someone's gone around the edge with a bright yellow highlighter pen.

#21 Scanning4Comets

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Posted 29 June 2014 - 12:02 PM

Has anybody done a shootout between the 17mm LVW and the 18mm Radian? :question:


#22 ausastronomer

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Posted 29 June 2014 - 12:47 PM

The Hyperion 17mm is a good eyepiece also.


It's a fair eyepiece but not near as good as the 18mm Radian or 17mm Vixen LVW in an F4.7 scope without a paracorr. You get what you pay for in this case.

Both excellent and as good as each other outside the extra 5 degree FOV in this case Marcus. The Radian may be a tiny touch tighter at the edge of its narrower FOV, but its very close. I like them both a lot.

Cheers

#23 Scanning4Comets

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Posted 29 June 2014 - 01:37 PM

I agree on the 17mm Hyperion. I actually put one in my focuser to see if it was as bad as the 31mm Baader ASPH and they were both just as bad as each other!

Hyperions are not good in fast scopes.....IMO, even the central area does not have a good "snap" test.

Thanks John, It's always nice to get some insight!

Cheers,

#24 precaud

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Posted 29 June 2014 - 01:57 PM

Hyperions are not good in fast scopes.....IMO, even the central area does not have a good "snap" test.


Hmmm... my Hyp 5mm has excellent snap-to-focus, in fact it is one of the first things I noticed about it when I got it, how sharp and distinct the optimum focus point was to find.

#25 Jim Romanski

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Posted 30 June 2014 - 12:34 PM

I have an 18mm Radian and I also have a 17mm Nagler and have used a 17.3mm Delos. They all have great eye relief and pinpoint views. I like FOV so I have to say that over all I prefer the 17mm Nagler. However, I bought the 18mm Radian to use on a small 4.25" F/4 reflector that I use as an auxiliary scope on my 17.5" scope. The Nagler and Delos are too large for the little 4.25" reflector and I wanted a long focal length eyepiece with lots of eye relief. The 18mm Radian works perfectly for this and it has a really nice views.

BTW - My two favorite 5mm eyepieces are the 5.1mm Pentax XO and the Radian 5mm.






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