6 replies to this topic

[JimP]

I have not heard a lot about these four eyepieces. Does anyone have any experience with them?

 

JimP

[RLK1]

I have not heard a lot about these four eyepieces. Does anyone have any experience with them?

 

JimP

https://www.cloudyni...ahashi-tak-uws/

[213Cobra]

I have all four, 10mm, 7mm, 5.7mm and 3.3mm. They are designed to presume a flat field scope. Fantastic 90° view that I prefer over wider 100°+ AFOV. Contrast and clarity comparable to Naglers, maybe a tad better. On the short end, the UW 3.3mm falls just short of the ultimate contrast seen in the simpler, narrower, Tak TOE 3.3, as expected. The Tak UWs are not inexpensive, but once you have them they are keepers.

 

All my Takahashi refractors are flat field quads, and I use a TSFlat2 on my LOMO triplets, visually, so the flat field scope expectation in the UW design is perfect for me. I have checked views in the LOMOs sans flattener, and the UW showed the f/6 FC as expected, only a trifle more notable than through a Nagler. The closest Nagler equivalents I have are 9mm and 3.5mm. I have the full set of more orthoscopic DeLites and TOEs. The Tak UWs emulate the contrast and clarity of the ortho-like narrower AFOV eyepieces while indulging a wide field for framing and drift time. The UW eyepieces are an astute reconciliation of conflicting ortho and wide field priorities.

 

Phil

[SandyHouTex]

I have all four, 10mm, 7mm, 5.7mm and 3.3mm. They are designed to presume a flat field scope. Fantastic 90° view that I prefer over wider 100°+ AFOV. Contrast and clarity comparable to Naglers, maybe a tad better. On the short end, the UW 3.3mm falls just short of the ultimate contrast seen in the simpler, narrower, Tak TOE 3.3, as expected. The Tak UWs are not inexpensive, but once you have them they are keepers.

 

All my Takahashi refractors are flat field quads, and I use a TSFlat2 on my LOMO triplets, visually, so the flat field scope expectation in the UW design is perfect for me. I have checked views in the LOMOs sans flattener, and the UW showed the f/6 FC as expected, only a trifle more notable than through a Nagler. The closest Nagler equivalents I have are 9mm and 3.5mm. I have the full set of more orthoscopic DeLites and TOEs. The Tak UWs emulate the contrast and clarity of the ortho-like narrower AFOV eyepieces while indulging a wide field for framing and drift time. The UW eyepieces are an astute reconciliation of conflicting ortho and wide field priorities.

 

Phil

I may have to get a few after that great review.

[Fivemileshigh]

This was only 2 years ago, and yet they seem to have vanished without a trace! Is there anywhere where one can still buy these?

Thanks.

[payner]

Seems the used market is the only way to obtain these. I have hardly seen any come up over the life of the production and can't recall seeing any post-production.

[j.gardavsky]

According to Takahashi, these eyepieces are "outdated",

https://takahashi-eu...ak-5-7uw-5-7-mm

 

Their outerform reminds me of some of the spotting Nikon eyepieces,

https://www.astrosho...iii-iii-/p,5530

 

But this is just an impression,

JG