Join for FREE
It only takes a minute!
Magnifying the passion for nature. Zeiss Victory Harpia 95. New!

Welcome to BirdForum.
BirdForum is the net's largest birding community, dedicated to wild birds and birding, and is absolutely FREE! You are most welcome to register for an account, which allows you to take part in lively discussions in the forum, post your pictures in the gallery and more.

1.6x extender coming!

Reply
 
Thread Tools Rate Thread
Old Wednesday 12th August 2015, 21:04   #1
dipped
Registered User

 
Join Date: May 2004
Location: suffolk
Posts: 1,123
1.6x extender coming!

Yes Kowa have taken on board the wishes of birders for an extender for their scopes to give 40x to 96x. Wow - now if only I had one of their new scopes.

Details here http://www.kowaproducts.com/KowaTSN8...1616xextender/
dipped is online now  
Reply With Quote
Old Wednesday 12th August 2015, 23:14   #2
karmantra
Registered User

 
Join Date: Feb 2005
Location: Oregon
Posts: 406
Thumbs up

Quote:
Originally Posted by dipped View Post
Yes Kowa have taken on board the wishes of birders for an extender for their scopes to give 40x to 96x. Wow - now if only I had one of their new scopes.

Details here http://www.kowaproducts.com/KowaTSN8...1616xextender/
Wow! Great product! Wonder if it will work with the original 20-60x eyepiece?
karmantra is offline  
Reply With Quote
Old Thursday 13th August 2015, 04:04   #3
Xayvian
Registered User

 
Join Date: Jul 2015
Location: Richmond, BC, CANADA
Posts: 19
Quote:
Originally Posted by dipped View Post
Yes Kowa have taken on board the wishes of birders for an extender for their scopes to give 40x to 96x. Wow - now if only I had one of their new scopes.

Details here http://www.kowaproducts.com/KowaTSN8...1616xextender/
Rob Wilton has tried it out and has included some sample pictures - http://www.lifeinfourthirds.co.uk/th...f-digiscoping/.
Xayvian is offline  
Reply With Quote
Old Friday 14th August 2015, 01:16   #4
stereotruckdriver
Registered User
 
stereotruckdriver's Avatar

 
Join Date: Feb 2008
Location: Oregon Coast
Posts: 1,773
Excellent, can't wait thanks for sharing.

Bryce...
stereotruckdriver is offline  
Reply With Quote
Old Friday 14th August 2015, 01:20   #5
stereotruckdriver
Registered User
 
stereotruckdriver's Avatar

 
Join Date: Feb 2008
Location: Oregon Coast
Posts: 1,773
Quote:
Originally Posted by karmantra View Post
Wow! Great product! Wonder if it will work with the original 20-60x eyepiece?
I have both ep's just looking don't see any difference to speak of so should work.

Bryce...
stereotruckdriver is offline  
Reply With Quote
Old Saturday 15th August 2015, 14:04   #6
DRodrigues
Registered User

 
Join Date: May 2007
Location: Coimbra
Posts: 475
Nice!!!
I hope it will be not expensive...
Kowa 88 models regained interest!
It's one more reason for Swarosvki produce a similar product for the Xline. The X95 has light enough to also go over 115x...
__________________
David
_____________________

http://www.pt-ducks.com
DRodrigues is offline  
Reply With Quote
Old Saturday 15th August 2015, 14:07   #7
Ratal
Registered User
 
Ratal's Avatar

 
Join Date: Jun 2012
Location: Scotland
Posts: 1,017
Quote:
Originally Posted by DRodrigues View Post
Nice!!!
I hope it will be not expensive...
Kowa 88 models regained interest!
It's one more reason for Swarosvki produce a similar product for the Xline. The X95 has light enough to also go over 115x...
It would have to go at the join mid body, and really would be a feat of engineering to take that strain. I'm looking forward to the first test results of the Kowa extender. This if results are favourable will be my set up.for.sea watching. Tried the Leica and it blew me away, just don't like the half buried focus wheels.
Ratal is offline  
Reply With Quote
Old Saturday 15th August 2015, 21:03   #8
henry link
Registered User

 
Join Date: Feb 2004
Location: north carolina
Posts: 4,155
I suppose I shouldn't complain since these extenders from Kowa and Leica are better than nothing, but they would be so much more useful if they were built into the scope bodies. They could easily be designed to switch in and out of the optical train at the turn of a knob, with no need to change parts on the scope backs. Questar scopes have had internal switchable 1.6x Barlows built into the scope bodies for 60 years.

Also I'm afraid this announcement means that no new Kowa scopes can be expected anytime soon. I'd much rather see a new 95-100mm scope. It's been almost 10 years since the introduction of the current scopes.

Last edited by henry link : Saturday 15th August 2015 at 22:01.
henry link is offline  
Reply With Quote
Old Sunday 16th August 2015, 22:05   #9
Vespobuteo
Registered User

 
Join Date: Aug 2013
Location: Utopia
Posts: 1,875
new 25-60 zoom with XD lenses last year, new TC this year,
kowa is working hard,

with Kowas fluorite lenses this one could work pretty good,
under good air conditions,

+ I love the music they use in their promo videos



but still missing KR-koatings on the 88/77 series,
strange that the cheaper scopes got it, but not the top scopes
Vespobuteo is offline  
Reply With Quote
Old Wednesday 19th August 2015, 22:29   #10
DRodrigues
Registered User

 
Join Date: May 2007
Location: Coimbra
Posts: 475
Quote:
Originally Posted by Ratal View Post
It would have to go at the join mid body, and really would be a feat of engineering to take that strain.
Nothing special. The problem is the optical design since in the X case, the extender is before the prism. Also it has to be thin since other wise the focus and zoom wheels will be too distant - I'm loving the X focus/zoom system...

Quote:
Originally Posted by Ratal View Post
I'm looking forward to the first test results of the Kowa extender. This if results are favourable will be my set up.for.sea watching. Tried the Leica and it blew me away, just don't like the half buried focus wheels.
For high magnifications optics have a look at cr-telescopes at www.pt-ducks.com

Henry,
I'm with you, but if it will help Swarovski to produce something similar to the X line, you will have a 95mm with high magnifications...
__________________
David
_____________________

http://www.pt-ducks.com
DRodrigues is offline  
Reply With Quote
Old Saturday 14th November 2015, 10:09   #11
DRodrigues
Registered User

 
Join Date: May 2007
Location: Coimbra
Posts: 475
Costs

Saw selling in USA at 385$ and in UE at 325 - similar to Leica price...
Not cheap but better than nothing i.e. purchasing an top astro-eyepiece isn't cheaper and not so easy to adapt, besides you keep the zoom function!
Any one have / tested one?
I'm waiting for the Swarovsky reply...
__________________
David
_____________________

http://www.pt-ducks.com
DRodrigues is offline  
Reply With Quote
Old Saturday 14th November 2015, 11:07   #12
Vespobuteo
Registered User

 
Join Date: Aug 2013
Location: Utopia
Posts: 1,875
Quote:
Originally Posted by DRodrigues View Post
Saw selling in USA at 385$ and in UE at 325 - similar to Leica price...
Not cheap but better than nothing i.e. purchasing an top astro-eyepiece isn't cheaper and not so easy to adapt, besides you keep the zoom function!
Any one have / tested one?
I'm waiting for the Swarovsky reply...
the price is reasonable, for 40-96x,
but just wonder if it will work well for
more general use,
thinking about ER, FOV, DOF etc,
Vespobuteo is offline  
Reply With Quote
Old Sunday 15th November 2015, 11:29   #13
kabsetz
Registered User

 
Join Date: Jun 2004
Location: Finland
Posts: 1,465
Vespo,

ER should remain the same. FOV for comparable magnification will be somewhat reduced, since at 40x it will have the same AFOV as without the extender at 25x, and zooms typically have an AFOV that increases with magnification. DOF will, as always, be directly related to magnification, so should be the same at 40x whether with or without the extender, but of course the depths of field attainable at under 40x mags will be unavailable when the extender is on.

But the main point with these kinds of extenders is not that they would be slapped on the scope and left there forever. Rather, you use it or not depending on what kind of situation you are in and what are your needs. Therefore, it expands your range of more general use, rather than limiting it. The magnification range of 25-96x available with this combo is nearly everything one could hope for for an 88mm high-quality scope. Only the sub-25x range is missing, as higher than 96x is unlikely to give any additional benefits in daytime use. For astro use, being able to reach 200x or thereabouts would be nice, but for birding 96x is fine. And it will show smaller detail further away than 60x, easily.

Kimmo
kabsetz is offline  
Reply With Quote
Old Thursday 3rd December 2015, 21:40   #14
dipped
Registered User

 
Join Date: May 2004
Location: suffolk
Posts: 1,123
It's here. 249 at Viking Optical Centres http://www.vikingopticalcentres.co.u...-ex16-extender.
dipped is online now  
Reply With Quote
Old Tuesday 8th December 2015, 10:17   #15
kabsetz
Registered User

 
Join Date: Jun 2004
Location: Finland
Posts: 1,465
I had a first encounter with the Kowa 1.6x Extender on a Kowa 883 & 25-60x wide zoom today.

Briefly, it is excellent and just as good as could be hoped for.

- Very little additional light loss. When viewing through just the extender alone, against a brightly lit white glass shelf very much like a light table, there is barely perceptible darkening through the lens, almost none. So little that if the alternative would be a dedicated eyepiece with a 40-96 range, I doubt I could see a difference to the zoom-extender combo. Coatings look very good.

- Image quality looks just the same as with the eyepiece without extender at corresponding magnifications. I had limited time so did not check fields of view.

- Sharpness, contrast and illumination is limited by the scope, not the eyepiece-extender combo. And the scope is very good indeed and can easily take magnifications up to the 154x I tried (will get to that in a minute).

- Just as without the extender, the image is sharp from edge to edge, with exceptionally low levels of lateral CA. Of course, as magnification goes up, the later CA there is becomes easier to see, but there is so little that it does not become objectionable.

- The extender is very compact, and adds less than an inch to the overall length of the eyepiece. It mounts very solidly and inspires confidence. It threads onto the male thread at the base of the eyepiece bayonet, the same thread that Kowa's digiscoping adapter threads to. In order to facilitate the digiscoping adapter, there's another identical male thread on the extender, under a plastic cover ring that screws off. The eyepiece bayonets on the extender, and there's a small metal safety pin/latch to prevent accidental eyepiece removal. For intentional eyepiece removal, the knobby needs to be pushed towards the scope body, not pressed down, while turning the eyepiece. There's a white arrow on the extender body to indicate the direction of movement, but for those who do not read instruction or look for these kinds of things, there's a risk of breaking the pin by incorrect operation and excessive force.

- The big surprise for me is that these extenders can be stacked. Since there's that digiscoping adapter mounting thread, on it, you can mount a second adapter onto the first just the same as the first to the scope body, and can keep adding if you wish. I tried it with two, which gives a range of 64-154x magnifications, and the results were just as good as could be expected with a high-quality 88mm scope at those magnifications. It will take much more rigorous testing to evaluate how much useful resolving power one gets in daylight viewing with the 100x + magnifications, but for birders who wish to use their spotter for astro use the 883 with a double extender at 154x would be an excellent planetary viewing scope.

I'll do a detailed review later, with comparisons to my ATX 95, but I think I can already say that for those who have a good 883/4 and do serious birding, the extender is a no-brainer. I would personally also choose this combo over the Swaro ATX 85. Compared to the ATX 95, these two have slightly different strengths, so if I could afford it I may wish to have both. As it is, I will most likely stick to my superb ATX, but if I were coming into premium scopes from something less spectacular, I might have to think about the choice a bit.

Kimmo
kabsetz is offline  
Reply With Quote
Old Tuesday 8th December 2015, 11:16   #16
DRodrigues
Registered User

 
Join Date: May 2007
Location: Coimbra
Posts: 475
Thanks Kimmo. You are giving me ideas...
I (we) need to have the Swaro reply to decide about the future options...
I think that are members of CloudyNights that will be interested in your report!
__________________
David
_____________________

http://www.pt-ducks.com
DRodrigues is offline  
Reply With Quote
Old Tuesday 8th December 2015, 12:25   #17
Vespobuteo
Registered User

 
Join Date: Aug 2013
Location: Utopia
Posts: 1,875
Seems like Kowa did a good job!
And good news for Kowa-owners.
I have only tried the Leica-converter and it seemed surprisingly bright.

A 1.6x converter would give a light loss of approx. 1.3 stops (in photographic terms).
In daylight probably not that easy to detect by eye.

Last edited by Vespobuteo : Tuesday 8th December 2015 at 12:46.
Vespobuteo is offline  
Reply With Quote
Old Tuesday 8th December 2015, 17:35   #18
JerryLogan
Registered User

 
Join Date: Oct 2014
Location: San Francisco
Posts: 243
Quote:
Originally Posted by kabsetz View Post
I had a first encounter with the Kowa 1.6x Extender on a Kowa 883 & 25-60x wide zoom today.

Briefly, it is excellent and just as good as could be hoped for.

- Very little additional light loss. When viewing through just the extender alone, against a brightly lit white glass shelf very much like a light table, there is barely perceptible darkening through the lens, almost none. So little that if the alternative would be a dedicated eyepiece with a 40-96 range, I doubt I could see a difference to the zoom-extender combo. Coatings look very good.

- Image quality looks just the same as with the eyepiece without extender at corresponding magnifications. I had limited time so did not check fields of view.

- Sharpness, contrast and illumination is limited by the scope, not the eyepiece-extender combo. And the scope is very good indeed and can easily take magnifications up to the 154x I tried (will get to that in a minute).

- Just as without the extender, the image is sharp from edge to edge, with exceptionally low levels of lateral CA. Of course, as magnification goes up, the later CA there is becomes easier to see, but there is so little that it does not become objectionable.

- The extender is very compact, and adds less than an inch to the overall length of the eyepiece. It mounts very solidly and inspires confidence. It threads onto the male thread at the base of the eyepiece bayonet, the same thread that Kowa's digiscoping adapter threads to. In order to facilitate the digiscoping adapter, there's another identical male thread on the extender, under a plastic cover ring that screws off. The eyepiece bayonets on the extender, and there's a small metal safety pin/latch to prevent accidental eyepiece removal. For intentional eyepiece removal, the knobby needs to be pushed towards the scope body, not pressed down, while turning the eyepiece. There's a white arrow on the extender body to indicate the direction of movement, but for those who do not read instruction or look for these kinds of things, there's a risk of breaking the pin by incorrect operation and excessive force.

- The big surprise for me is that these extenders can be stacked. Since there's that digiscoping adapter mounting thread, on it, you can mount a second adapter onto the first just the same as the first to the scope body, and can keep adding if you wish. I tried it with two, which gives a range of 64-154x magnifications, and the results were just as good as could be expected with a high-quality 88mm scope at those magnifications. It will take much more rigorous testing to evaluate how much useful resolving power one gets in daylight viewing with the 100x + magnifications, but for birders who wish to use their spotter for astro use the 883 with a double extender at 154x would be an excellent planetary viewing scope.

I'll do a detailed review later, with comparisons to my ATX 95, but I think I can already say that for those who have a good 883/4 and do serious birding, the extender is a no-brainer. I would personally also choose this combo over the Swaro ATX 85. Compared to the ATX 95, these two have slightly different strengths, so if I could afford it I may wish to have both. As it is, I will most likely stick to my superb ATX, but if I were coming into premium scopes from something less spectacular, I might have to think about the choice a bit.

Kimmo
Thanks Kimmo, that's a great report and good news!

Also, as a follow up to your stacked extender thought, it's now likely that a t2 adapter can be fitted to the extender which would allow for mounting an eyepiece holder and the use of any standard astronomical eyepiece, not just the Kowa.

Best,
Jerry
JerryLogan is offline  
Reply With Quote
Old Monday 21st December 2015, 11:46   #19
Boy Wonder
Warden - RSPB Lincolnshire Wash Reserves

 
Join Date: May 2008
Location: RSPB Frampton Marsh
Posts: 532
So this is now out and in the field.... Think this would be a better investment than upgrading to the new zoom but wondered if anyone has tried it with the 30x? Would give a 48x and if it retains the clarity and qualities or at least has minimal drop off then this combo would blow any other fixed lenses out of the water. Ideal for seawatching and scanning the flat Lincolnshire expanses. Any reviews or digiscoped photos (especially with smartphones) would be much appreciated. Thank you
T
Boy Wonder is offline  
Reply With Quote
Old Monday 21st December 2015, 16:34   #20
israel
Registered User

 
Join Date: Mar 2006
Location: west midlands
Posts: 172
Quote:
Originally Posted by Boy Wonder View Post
So this is now out and in the field.... Think this would be a better investment than upgrading to the new zoom but wondered if anyone has tried it with the 30x? Would give a 48x and if it retains the clarity and qualities or at least has minimal drop off then this combo would blow any other fixed lenses out of the water. Ideal for seawatching and scanning the flat Lincolnshire expanses. Any reviews or digiscoped photos (especially with smartphones) would be much appreciated. Thank you
T
I have had mine two weeks and am very impressed.Coupled with the 883 and the older 20-60 zoom i don't see the need for the newer 25-60.

Chris.T.
israel is offline  
Reply With Quote
Old Monday 21st December 2015, 16:53   #21
Pileatus
Registered User

 
Join Date: May 2004
Location: USA
Posts: 2,483
Quote:
Originally Posted by Boy Wonder View Post
So this is now out and in the field.... Think this would be a better investment than upgrading to the new zoom but wondered if anyone has tried it with the 30x? Would give a 48x and if it retains the clarity and qualities or at least has minimal drop off then this combo would blow any other fixed lenses out of the water. Ideal for seawatching and scanning the flat Lincolnshire expanses. Any reviews or digiscoped photos (especially with smartphones) would be much appreciated. Thank you
T
I like the 30X but I bought the 25-60 zoom along with a new 883 body. After a lot of "looks" I just could not justify the 30X. Also, the Kowa 30X is now discontinued, probably due to the superb performance of the 25-60.

I used a 30X exclusively on my ED82A for many years and I loved it. The Kowa 25-60 does more and it does it better.
Pileatus is offline  
Reply With Quote
Old Monday 21st December 2015, 18:23   #22
markho
Registered User

 
Join Date: Jun 2004
Location: ruislip
Posts: 1,169
I have a 883 and I am thinking of getting this. I assume the stay-on case part that goes over a normal eyepiece is unusable when the extender is in use. As I wouldn't fancy taking eyepiece's on and off out in the field on a wet day like today.
markho is offline  
Reply With Quote
Old Monday 21st December 2015, 21:28   #23
israel
Registered User

 
Join Date: Mar 2006
Location: west midlands
Posts: 172
Quote:
Originally Posted by markho View Post
I have a 883 and I am thinking of getting this. I assume the stay-on case part that goes over a normal eyepiece is unusable when the extender is in use. As I wouldn't fancy taking eyepiece's on and off out in the field on a wet day like today.
You can just about use the stay on case when the extender is in use by using the one top press stud only.

Chris.T.
israel is offline  
Reply With Quote
Old Monday 21st December 2015, 22:30   #24
Boy Wonder
Warden - RSPB Lincolnshire Wash Reserves

 
Join Date: May 2008
Location: RSPB Frampton Marsh
Posts: 532
Quote:
Originally Posted by Pileatus View Post
I like the 30X but I bought the 25-60 zoom along with a new 883 body. After a lot of "looks" I just could not justify the 30X. Also, the Kowa 30X is now discontinued, probably due to the superb performance of the 25-60.

I used a 30X exclusively on my ED82A for many years and I loved it. The Kowa 25-60 does more and it does it better.
Sorry if I wasn't clear. I already have the 30x as I got it when I bought the scope several years back. Just wondering if anyone that has the extender has the wide as well and knows if they are compatible and also if they perform well together. I wasn't sure if this 1.6 lens was purely designed to enhance the zoom eyepieces.
Thank you for your replies.
Boy Wonder is offline  
Reply With Quote
Old Tuesday 22nd December 2015, 01:17   #25
Pileatus
Registered User

 
Join Date: May 2004
Location: USA
Posts: 2,483
Quote:
Originally Posted by Boy Wonder View Post
Sorry if I wasn't clear. I already have the 30x as I got it when I bought the scope several years back. Just wondering if anyone that has the extender has the wide as well and knows if they are compatible and also if they perform well together. I wasn't sure if this 1.6 lens was purely designed to enhance the zoom eyepieces.
Thank you for your replies.
I'm not sure but I can't see why it wouldn't work with the 30X.
Here's the customer service email.
[email protected]
They respond quickly and should have your answer.

Hope it works for you.

PS
I originally thought it would be more versatile just to add the 25-60 zoom instead of increasing the fixed 30X to 48X. Then again, the zoom is a more expensive route to your goal.
Pileatus is offline  
Reply With Quote
Advertisement
Reply


Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Which extender? Xmor Canon 8 Tuesday 11th November 2014 19:30
1.7x Extender davethebird Canon 9 Sunday 17th June 2012 15:45
1.4 extender on a 40D with 100-400? nikovich Canon 5 Monday 16th March 2009 02:27
Extender lesjames Cameras And Photography 1 Sunday 9th May 2004 18:15

{googleads}

Fatbirder's Top 1000 Birding Websites

Help support BirdForum

Page generated in 0.24334097 seconds with 34 queries
All times are GMT. The time now is 20:58.