KOWA Prominar TSN-99A & TE-80XW Eyepiece Review, By Darin Cooper

robby denning

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Wow Darin, one of the most thorough optic reviews we’ve published on Rokslide. You and @Matt Cashell have the optics reviews nailed down for sure.

And what a great option to be able to rent the Kowa and eyepieces before buying. Good job man
 

Matt G.

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Great review. Just curious, did they update the eyepiece lens cap. The current one slats falls off. Can you supply a picture of that.

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Rent Outdoor Gear

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Great review. Just curious, did they update the eyepiece lens cap. The current one slats falls off. Can you supply a picture of that.

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I don’t think so. I should have commented on the eye piece cap being sub par. You can see the marks made by the cap ribs/slats on the eyepiece rubber in a couple of the photos. It held on decent but wasn’t immune to getting knocked off. I hope the ribs on the cap won’t cause wear to the rubber on the eyepiece over time. I will be searching for a better option.


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aaronk

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I don’t think so. I should have commented on the eye piece cap being sub par. You can see the marks made by the cap ribs/slats on the eyepiece rubber in a couple of the photos. It held on decent but wasn’t immune to getting knocked off. I hope the ribs on the cap won’t cause wear to the rubber on the eyepiece over time. I will be searching for a better option.


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How did the RRS Ascend handle the weight of the spotter?
 

Rent Outdoor Gear

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It works great with a heavy spotter. My Buddy that used it with the TSN-99 decided then-and-there he needed one. Like any tripod, it’s more stable with column down, but it’s still adequate fully extended.

I still occasionally fumble with the controls as I’m not completely used to them. I’ve used the anvil-30 head a lot more and think I still prefer it in spite of the minor weight penalty and loss of independent planning base. I’m not sure I wouldn’t feel the opposite had I started with the Ascend ball head though. Verdict is still out.


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idcuda

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Great review. Just curious, did they update the eyepiece lens cap. The current one slats falls off. Can you supply a picture of that.

Sent from my SM-G981U using Tapatalk
If you have the old rubber version, you can email their customer support and they'll send you an updated version for free. I did that a month or so ago and the current rev is much better; it doesn't fall off easily. Probably the same as what's on the 99mm, since it has the same indentions on the eyepiece (I don't have any concerns about that).
 

Hatchet Jack

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Great review

dont know why everyone uses zoom eyepieces. If you really want great glass fixed eyepieces are definitely the way to go
My little kowa 66 with the 30x fixed wide angle eyepiece is astoundingly sharp and bright with great edge to edge clarity. I can't imagine how amazing the new 40x fixed on the Kowa 99 is.
 
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