• Welcome to BirdForum, the internet's largest birding community with thousands of members from all over the world. The forums are dedicated to wild birds, birding, binoculars and equipment and all that goes with it.

    Please register for an account to take part in the discussions in the forum, post your pictures in the gallery and more.
ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

TSN-664 Prominar ED Lens

kowa tsn 664 flourite ED spotting scope
Manufacturer
Kowa

Item details

Product Highlights
These high-performance models have been created by taking the superior qualities of the TSN-820M Series and putting them into a smaller, more compact scope. These sophisticated scopes satisfy the needs of users in all fields, from beginning bird watchers to scientific researchers.

Features
Prominar Fluorite Lens
For the highest optical performance and optimum color fidelity.

Highest Level of Optical Performance
The 66mm diameter objective lens has more than 120% light gathering power of the 60mm objective lens. All optics are fully multi-coated for brighter, clearer and sharper viewing. Prominar ED models are also available for even better optical performance with optimum color definition.

Compact and Light Weight
Main body length of about 30cm and weight of only 1 kg. Available in Angled or Straight viewing types with the Kowa easy-to-use functions.

Fully Water-Proof Body
An all weather scope completely sealed making it fully water-proof. Nitrogen gas purged to prevent the lens from fogging. "Not intended for underwater use".

Specifications
Effective Diameter of Objective Lens: 66mm
Minimum Focusing Distance: 6m
Main Body Length: 312mm
Main Body Weight: 1,020g

Warranty: Lifetime of the product

Latest reviews

Recommended
Yes
Price
0$
Pros
  • small, bright, sharp, robust
Cons
  • objective hood is tighter than I like
I wrote a review of this scope in March 2008, this is a followup after some heavy use over the past 2 years.

I'll keep it brief. I am still thrilled with this scope and feel it is one of the most under rated spotting scopes out there. Not sure there would be any reason to upgrade, it is as good as any 66mm scope on the market.

Russ
Recommended
Yes
Price
0$
Pros
  • optical quality, focusing, size, weight
Cons
  • Screw on aperture lens cover
This is an excellent spotting scope for the field. The spotting time of this scope is amazing. Again and again, I am amazed at how quickly I can align and focus this scope on a bird in flight or on the ground.

The quality of the body and the eyepiece are excellent.

The one thing that I find a little frustrating is the time it takes to unscrew the aperture lens cap. A quicker snap-on version would be quicker.
Recommended
Yes
Price
900$
Pros
  • small, light
Cons
  • a bit pricey
I will keep this review short and sweet. I have owned both a Nikon Fieldscope EDIII and a Kowa TSN 824 so I do have some experience with decent optics.

This scope is very small and light and is easily carried around which is a big part of the reason I sold my 824. I recieved this scope with the older 20-60x zoom on it and was a little disappointed. I bought the new 20-60x zoom and it has brought this scope up to the level of other top 60-65mm scopes. I am quite surprised more people don't use this unit, reviews are few and far between and none of them rate it very high. I rate it as one of the best small scopes I'v looked through and I'v looked through them all. The optical differences in top scopes are incrimental to my eyes, this scope is amongst the top and is the optical equivelant of other top brands in the same category. I recommend it highly. Make sure you have the newer eyepiece to get the most out of this scope!

Item information

Category
Compact Spotting Scopes
Added by
Russ Jones
Views
46,563
Reviews
3
Last update
Rating
5.00 star(s) 3 ratings

More in Compact Spotting Scopes

Share this item

Back
Top