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Pentax XW 3.5 mm and 5 mm discontinued

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#26 Sarkikos

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Posted 20 September 2016 - 02:19 PM

The closest eyepieces to a larger AFOV 3mm are an Ethos-SX 3.7 (110 degrees) and a Nagler T6 2.5 (82 degrees).

 

Mike


Edited by Sarkikos, 20 September 2016 - 02:21 PM.


#27 Deep13

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Posted 20 September 2016 - 03:45 PM

I have a 5, but can only use it in very good seeing. Also have 7 and 10. They are very nice.
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#28 SteveG

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Posted 20 September 2016 - 04:39 PM

 

 

Too bad, the 3.5 and 5 XWs are wonderful eyepieces. Maybe a bit more breathing room for TeleVue (Delos) though. 

 

 

There is a downside to brand loyalty. For many years I drank the Green kool-aide and would not look at the XW's.

 

When I finally did look at the 5XW I realized that Pentax was about 10 years ahead of Delos. And still better.

 

Wow! I'm a fan of both brands, but I always thought the Delos was designed as an equal to the XW's. I don't have nor have I looked through any Delos. What didn't you like about them, and which did you have?



#29 paradise

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Posted 20 September 2016 - 05:15 PM

 


Wow! I'm a fan of both brands, but I always thought the Delos was designed as an equal to the XW's. I don't have nor have I looked through any Delos. What didn't you like about them, and which did you have?

 

I have compared 10mm Delos and Pentax eyepieces with fast Newtonians, they are really equivalent.

The 14mm Delos has a better control of field curvature, well seen in fast Newtonians.

 

I have compared the 6mm Delos with the 7mm Pentax, it is very difficult to say which one is 'better', cause of the different focal lenght.

 

I do not know about 5, 4.5, and 3.5mm's.

 

I think that the two lines are, nearly, equivalent.

 

Some observers found very little differences depending on the types of objects, planetary or DSO.



#30 ausastronomer

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Posted 20 September 2016 - 09:23 PM

Here are the replacements:   3.7 Ethos-SX, 4.7 Ethos-SX.

 

Mike

Not and never will be.  FOV is too large and eye relief insufficient for many observers.

 

Cheers,

John B


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#31 ausastronomer

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Posted 20 September 2016 - 09:31 PM

 

 


Wow! I'm a fan of both brands, but I always thought the Delos was designed as an equal to the XW's. I don't have nor have I looked through any Delos. What didn't you like about them, and which did you have?

 

I have compared 10mm Delos and Pentax eyepieces with fast Newtonians, they are really equivalent.

 

I think that the two lines are, nearly, equivalent.

 

Some observers found very little differences depending on the types of objects, planetary or DSO.

 

 

That's a pretty good achievement on Pentax's part considering the design is over 15 years old and the parent design (Pentax XL's) is well over 20 years old.  That having been said, to be fair, when the Pentax XL's and XW's were designed Pentax's annual budget for Reseach and Development was probably a much larger number than Televue's annual sales revenue.

 

Cheers,

John B


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#32 AustinAstronomer

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Posted 20 September 2016 - 09:33 PM

Why are the Pentax XW's being discontinued, slowly but surely?  Are they not selling sell?  I have to assume that they are not.

 

Bill



#33 Jeff Morgan

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Posted 20 September 2016 - 11:05 PM

Wow! I'm a fan of both brands, but I always thought the Delos was designed as an equal to the XW's. I don't have nor have I looked through any Delos. What didn't you like about them, and which did you have?

 

 

On Delos, I actually liked them quite a bit. I owned the 8, 10, and 14. (The 17.3 briefly, not used enough to count.) 

 

But I felt Pentax was just a bit better optically and much better ergonomically (5mm and 7mm). They are reputed to have field curvature issues in the longer lengths and after seeing it in the 40XW I never pursued others.

 

Both my Delos and XW were replaced by a better eyepiece (Leica ASPH), not sold for any reason of deficiency or dislike. If I was to go back to fixed-length eyepieces it would be XW 10mm and below, Delos 12mm and above.


Edited by Jeff Morgan, 20 September 2016 - 11:06 PM.

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#34 CounterWeight

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Posted 21 September 2016 - 01:49 AM

Well I guess that helps make up my mind about the 3.5 decision...  I'll try and snag a Pentax 3.5 XW while there's still some left out there at the dealers, the site host Astronomics lists them as in stock.


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#35 Sarkikos

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Posted 21 September 2016 - 05:28 AM

 

Here are the replacements:   3.7 Ethos-SX, 4.7 Ethos-SX.

 

Mike

Not and never will be.  FOV is too large and eye relief insufficient for many observers.

 

Cheers,

John B

 

 

But much better for scopes that don't track.

 

Mike



#36 Sarkikos

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Posted 21 September 2016 - 05:41 AM

 

On Delos, I actually liked them quite a bit. I owned the 8, 10, and 14. (The 17.3 briefly, not used enough to count.) 

 

But I felt Pentax was just a bit better optically and much better ergonomically (5mm and 7mm). They are reputed to have field curvature issues in the longer lengths and after seeing it in the 40XW I never pursued others.

 

Both my Delos and XW were replaced by a better eyepiece (Leica ASPH), not sold for any reason of deficiency or dislike. If I was to go back to fixed-length eyepieces it would be XW 10mm and below, Delos 12mm and above.

 

I agree on all points.

 

IME with Delos, it was more difficult to acquire and sustain the exit pupil for comfortable viewing.  With the XW's, I could just take a casual look through the eyepiece and my eye was exactly where it needed to be.  

 

However, I did experience severe field curvature in the XW 20.  My eyes do not accommodate well.  Even the old trick of focusing between center of field and edge of field did not work for me.  I needed to put the eyepiece in a Paracorr before I could get some relief from the FC.  The threat of FC is why I have not pursued the XW 30, 40 or 14.  

 

Mike


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#37 Mariner@sg

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Posted 21 September 2016 - 08:16 AM

 

 

The good news is there will be plenty of the eye massage eyepieces on the used market for many years. 

At eye gouging prices! :(

 

You mean like $650 for a used 2" XW?  :)

 

In defence there was another one that sold for $675. ;)



#38 Sarkikos

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Posted 21 September 2016 - 08:31 AM

Might as well wait for the next TeleVue sale - or a coupon from a vendor - and get a new 31 T5 or 21 E.  No FC to my eyes in either of those.

 

Mike


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#39 CounterWeight

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Posted 21 September 2016 - 02:26 PM

Got a shipping notice from Astronomics - PXW 3.5 on the way :)



#40 Tamiji Homma

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Posted 21 September 2016 - 02:35 PM

If you go to Japanese Ricoh telescope/eyepiece web page, XW 5 and 3.5 are still listed.

You can see XW 30 and 40 were listed as discontinued but 5 and 3.5 aren't listed as "discontinued."

 

http://www.ricoh-ima...lescope/eye/xw/

 

It makes me wonder :)

 

Tammy


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#41 areyoukiddingme

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Posted 21 September 2016 - 05:23 PM

If you go to Japanese Ricoh telescope/eyepiece web page, XW 5 and 3.5 are still listed.

You can see XW 30 and 40 were listed as discontinued but 5 and 3.5 aren't listed as "discontinued."

 

http://www.ricoh-ima...lescope/eye/xw/

 

It makes me wonder :)

 

Tammy

 

The link at the top contains information on the XO series and full XWs. Gives the impression that they may not have updated for a little while.



#42 Jeff Morgan

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Posted 21 September 2016 - 05:38 PM

This puts me in mind of the angst when Tele Vue discontinued the 26 and 20 Naglers.

 

Don't sweat it guys, enough of these eyepieces are in circulation that they will be available on the used market for decades to come. But it may require some patience ...


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#43 Sarkikos

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Posted 21 September 2016 - 06:45 PM

... and some green.  Not necessarily the kind on TeleVue eyepieces.

 

Mike



#44 Howard Gao

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Posted 21 September 2016 - 08:21 PM

 

If you go to Japanese Ricoh telescope/eyepiece web page, XW 5 and 3.5 are still listed.

You can see XW 30 and 40 were listed as discontinued but 5 and 3.5 aren't listed as "discontinued."

 

http://www.ricoh-ima...lescope/eye/xw/

 

It makes me wonder :)

 

Tammy

 

The link at the top contains information on the XO series and full XWs. Gives the impression that they may not have updated for a little while.

 

And Ricoh should still have some stock themselves which can be sold to dealers.



#45 csrlice12

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Posted 21 September 2016 - 08:35 PM

Of course, if you have a few spare hundreds laying around...



#46 Sarkikos

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Posted 21 September 2016 - 08:36 PM

Yes, the XW's were much better deals a few years ago.  I choose not to buy them at their current new prices.   And I don't want to buy used if I can help it.  Besides, I've found other eyepieces to take their places.  

 

Ethos and XO for the shorter ranges.  Baader & Leica Zoom for the middle.  Ethos, Nagler and Pan for the longer focal lengths.

 

I'm done with the XW's.

 

Mike


Edited by Sarkikos, 22 September 2016 - 05:45 AM.


#47 GeneT

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Posted 21 September 2016 - 09:07 PM

Were the sales not good enough? The 3.5 and 5 XW's are excellent eyepieces. I prefer the Delos only because the 4.5 and the 6 suit my 12.5 inch, F5 telescope better for me.



#48 CounterWeight

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Posted 21 September 2016 - 09:13 PM

I think I can remember buying new for in the $270's years back for the 1.25"  fl's? 



#49 Jeff Morgan

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Posted 21 September 2016 - 09:22 PM

Were the sales not good enough? 

 

When you look at astronomy as a hobby - it is a very small niche. The big-name companies cater to birders, photographers, etc etc etc. More of them. And they probably spend more money too (as hard as that may be for us to believe).

 

Aside from the Cottage Industry players, astronomers are probably on the bottom of everyones list. 


Edited by Jeff Morgan, 21 September 2016 - 09:23 PM.


#50 paradise

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Posted 22 September 2016 - 03:55 AM

Yes, the XW's were much better deals a few years ago.

 

Mike

Why many people do not own XW's ? Are they not informed enough ? :grin:


Edited by paradise, 22 September 2016 - 04:11 AM.

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