Kowa Prominar "Glass" vs Swaro ATX/STX/BTX Modularity

jvon2011

FNG
Joined
Jan 18, 2024
After spending several years behind low quality Celestron glass, I decided to upgrade this past season to a pair of Razor UHD 10x42s. I also added my first spotter to the quiver with the new Razor 13-39x56. I'm primarily a backcountry archery elk hunter, so I didn't feel I needed a big spotter with the larger zoom. That said, I've also started getting into more glass intensive hunts so I can spend more time in the field each year. After most of a season behind the glass, its been undeniable their impact on my ability to find and identify game at distance. All that said, I'm admittedly a bit of a gear head, and find myself wanting to upgrade and further improve that glassing experience. I feel the UHDs and the mini Razor are suiting the way I'm currently using them well enough that the first upgrade, or maybe I should say addition, to my quiver that I'd like to make is a larger spotter. In the long term, I'd like to add to that quiver so I can choose the glass that best suits the hunt I'm on.

After all of my research, I've narrowed it down to (2) lines of spotters, the Swarovski ATX/STX/BTX line, and the new Kowa Prominar line of scopes. I feel I've read enough reviews/comparisons of the scopes to know the Kowa "glass" is subjectively better. I've never used dual focus wheels either, but they seem ideal for me in theory. The helical focus on my Vortex drives me nuts, which gives me a little pause in sinking a ton of $$ into alpha glass with it. On the other hand, the modularity of the Swarovski scopes is what I find intriguing, making it difficult to choose. In the time I've spent behind my current spotting scope, I find myself wishing I had bought the Razor with the straight model 50% of the time, while I'm glad I have the angled model the other 50% of the time. The ability to purchase both the ATX and STX with a single objective lens to have that flexibility in the long term would be a plus in my mind. On the flip side, I could just purchase the body of a second Kowa scope for less than an ATX or STX, depending on the objective lens size. Where the dilemma really comes in is the ability to add the BTX to the lineup. I think its hard to argue that glassing with (1) eye at 20x on a spotter is better than glassing with (2) eyes at 10x with a pair of binos. The same would logically apply to the BTX at 30x vs a typical spotter at 60x. But, I'm not sure how often I'd use it considering the size and weight.

For those of you out there with Alpha glass, what did you do, or what would you do if you could do it again? Is the flexibility and possibility of adding the BTX to the quiver enough to go with Swaro? Or would you go with a couple Kowa bodies in the long term and call it a day?
 
I did all the same research and time in field as you and I ended up buying the Kowa 884 (straight). I felt based on reviews you are splitting hairs on overall image quality of the 2. I would not trade my Kowa for a BTX just for the fact that it’s extra weight and bulk to me. I’ve glassed behind sub alpha glass with Zeiss and Vanguard. I would get a great deal of eye fatigue with both scopes. The Kowa does not give that problem, also I wear an eyepatch which to me makes a big difference. I can spend hours behind it and have no problems. The duel focus is the best focus wheel u can have it makes a world of difference. IMO I will never replace the Kowa, I am going buy the 554 for lightweight backpacking hunts. I do not have anything against Swarovski. I may have bought the BTX if I could afford it but dollar for dollar it’s tough to beat a Kowa. I hope this helps and wish u luck on deciding. If u have any other questions about the Kowa PM me and I’ll answer it best I can
 
I like the eye patch idea. Never thought of that.

Kinda makes me think that a pair of 15X SLCs or 18X UHDs would be the much more economical choice if I really wanted to glass with both eyes and more zoom. Not to mention the packability if I was on a backcountry hunt. Any experience with the higher zoom binos or have you not found the need for them?
 
I really wanted a Swaro 65, but listened to the research and bought the Kowa 66. I wish I had bought the Swaro. Try to test them out for yourself and don’t let others sway you.
 
Any particular reason why you wish you had gone with the Swaro instead?

I've honestly been leaning towards the Kowa, but all these hypothetical uses has the Swaro sticking in the back of my mind. Haven't looked through either though honestly. Haven't seen the need since I don't have any place locally to do that (no Kowa around) to my knowledge.
 
Any particular reason why you wish you had gone with the Swaro instead?

I've honestly been leaning towards the Kowa, but all these hypothetical uses has the Swaro sticking in the back of my mind. Haven't looked through either though honestly. Haven't seen the need since I don't have any place locally to do that (no Kowa around) to my knowledge.
The Kowa wasn’t as clear at the top magnification as I would have liked. Also, the dual focus wheels are aggravating as heck. Way too touchy/finicky in my opinion.
 
I like the eye patch idea. Never thought of that.

Kinda makes me think that a pair of 15X SLCs or 18X UHDs would be the much more economical choice if I really wanted to glass with both eyes and more zoom. Not to mention the packability if I was on a backcountry hunt. Any experience with the higher zoom binos or have you not found the need for them?

I have 12.5x 50 tract binos but no experience with 15s or 18s. I have held them in the store and the only thing I did not like was the weight. They can get significantly heavier because most brands go to 56mm. IMO the 12s as big as I would personally go just because I have a good spotter. I agree though that it would be easier on the eyes for sure, I would watch the weight because my binoculars bivy starts to irritate my neck after a few days and I could not imagine it getting heavier if u know what I mean. I would not try and sway u to Kowa or Swaro, they r both excellent choices but I do not have any experience with Swaro just Kowa and I am happy with my decision and it was based more on a cost basis. $1000 more for one vs the other. If you use your spotter all year long I may have bought the BTX but I only use it a few times a year so the cost to me is not justifiable. I will say this though, a $1500-$2000 spotter is still not in the same league as the swaro or Kowa. I had a nice Zeiss spotter at around $1800 at the time and the Kowa blows it away, so by saying that buy once cry once would be my suggestion if u can afford it.


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Buy the Kowa.... If the BTX really intrigues you buy it later separately

Here is my reasoning. First the cost of just the ATX eyepiece is $2400, that basically gets you there for the Kowa66. The modularity seems great on the ATX/STX/BTX series but when you get down to it an ATX 65(56 ounces) weighs as much as the Swaro ATS 80 and more than the Kowa 88 at 52oz.

If the BTX really interests you buy it as its own optic that is dedicated for certain hunts you need it. Each time you separate the body from the eye piece in the field you are opening up the opportunity for dust and debris to get in and scratch your glass.

Ive also never been in any situation where i needed the STX eyepiece, i dont see having both as a plus.

This is coming from someone who owns the ATX, BTX, 85mm and 65mm lenses. just my .02
 
Buy the Kowa.... If the BTX really intrigues you buy it later separately

Here is my reasoning. First the cost of just the ATX eyepiece is $2400, that basically gets you there for the Kowa66. The modularity seems great on the ATX/STX/BTX series but when you get down to it an ATX 65(56 ounces) weighs as much as the Swaro ATS 80 and more than the Kowa 88 at 52oz.

If the BTX really interests you buy it as its own optic that is dedicated for certain hunts you need it. Each time you separate the body from the eye piece in the field you are opening up the opportunity for dust and debris to get in and scratch your glass.

Ive also never been in any situation where i needed the STX eyepiece, i dont see having both as a plus.

This is coming from someone who owns the ATX, BTX, 85mm and 65mm lenses. just my .02
This is EXACTLY the kind of feedback I was hoping for. I still want to get behind both of them for a look of my own, but this puts my mind at ease.
 
I have the Kowa 77, 88, 99A, Swaro ATC, and BTX 85 and 115. I’ll say for getting super sharp on a very long distance object or animal, the 99A wins, notably. But for breaking down terrain, the FOV and ease of use in the BTX 85mm is pretty awesome. Outright glass quality I’ve found Kowa wins over ATX as well, but I read somewhere that the Swaro’s have a protective element over their crystal, Kowa does not. I tried to buy really high end clear or UV protective elements for the 99A and they notably degraded image quality. If you factor that in, if correct, Kowa’s improved optical quality changes in my mind. You are spot on though that the dual focus wheel is a game changer. After using it on vs traditional spotter, I will never go back.
 
Thanks for the good breakdown S1n1ster.

I pulled the trigger during the Western Hunt Expo on a Kowa 66A. In hindsight, I probably should have gone with the 88 or 99 since I already have a Razor 56, but I figured that the 66 would have the most utility for me over the next couple seasons. My long term plan right now would be to add a 99A and 55S to the quiver for various reasons. Who knows about a BTX. I might just add some 15x or 18x binos to extend my reach a bit when searching for game. Regardless, the Kowa glass is insane. I can glass some slopes at 5.5 - 7 miles from my house and with good conditions, I can see individual tracks in the snow. Not trails in the snow, but single tracks which blows my mind. I do love the dual focus know when using it, but do get a bit nervous that it could get unintentionally broken in my pack. Not sure if that's a legit concern, or if it comes with a new $$$ scope.
 
Ive had 2 773s, maven s1.a, btx/atx 85, and an stc.

I miss my 773s, but ive decided to get an 884 for scouting and to use my stc during hunting season.

The btx was fun but in the mountains id just rather bring some 15s and a full size spotter. In most cases it’s less weight.
 
I’ve had a BTX and 15SLC and have over the years settled on big binos and big spotter (88S) for scouting and the little STC and NL12’s for hunting. I found the BTX to be dark with anything less than the 95. I preferred using 15x56 to an 85BTX most of the time. I prefer the Kowa to the ATX/STX line for the focus. Picture is about equally awesome to me.


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I faced the same decision a short while back. Looked at everything and ended up buying the Kowa 88A - no regrets. While Swarovski’s modular system looks great on paper and in theory I’d prefer having multiple scopes, which I can buy for probably less than SW’s modular princes.
 
Thanks for the good breakdown S1n1ster.

I pulled the trigger during the Western Hunt Expo on a Kowa 66A. In hindsight, I probably should have gone with the 88 or 99 since I already have a Razor 56, but I figured that the 66 would have the most utility for me over the next couple seasons. My long term plan right now would be to add a 99A and 55S to the quiver for various reasons. Who knows about a BTX. I might just add some 15x or 18x binos to extend my reach a bit when searching for game. Regardless, the Kowa glass is insane. I can glass some slopes at 5.5 - 7 miles from my house and with good conditions, I can see individual tracks in the snow. Not trails in the snow, but single tracks which blows my mind. I do love the dual focus know when using it, but do get a bit nervous that it could get unintentionally broken in my pack. Not sure if that's a legit concern, or if it comes with a new $$$ scope.
Also have the 66A and find that it goes with me far more often when I need to pack or carrry the scope. Still use my 88A quite a bit, but the 66A offers far more utility. As always, experience dictates that the best optic is the one you’ll most often have with you in the field.
 
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