Kowa TSN-773 spotting scope
Kowa TSN-773 spotting scope is the absolute top in telescopes: comparable with Swarovski, but more affordable! For birders and hunters this spotting scope redefines clarity. This is because (among other impressive features) this spotting scope has a large 77mm XD Prominar objective lens made from ultra quality optical glass. This gives a maximum light gathering, clear field of view and a sharp image. This is beyond comparison with traditional glass lenses.
Filled with nitrogen and fully waterproof
The magnesium alloy body makes this scope sturdy, compact, portable and easy to use. The waterproof housing meets the rigorous standards of JIS Protection Class 7. This spotting scope is filled with nitrogen gas so that water and moisture remain outside.
New inner focusing system: movements in image are reduced
The Kowa TSN-774 spotting scope has a new internal focus system so that, when focused on objects, movements of the image are effectively reduced. The picture above shows a large focus knob and a small one in front of it. This allows you to focus coarse and fine. (Image is of TSN 883)
Interchangeable Eyepieces: Choose from 25x magnification, 30x magnification or a zoom eyepiece 20x to 60x
Multiple interchangeable eyepieces are available, including a 20x-60x zoom, 30x Wide and 25x LER for a total coverage in the field. An eyepiece locking mechanism prevents the eyepiece from coming off This spotting scope comes without eyepieces! To complement the spotting scope you should therefore order one of several eyepieces, which you can find under the accessories or in the bundle offer on this page! (Image is of TSN 883)
Interchangeable tripod connection
The Kowa TSN 774 spotting scope is equipped with an additional screw in the tripod socket so that it can cooperate with 1/4-20" and 3/8" tripod sockets. We don't see this with Swarovski, Leica or Zeiss.
Differences Kowa TSN 771, 773 and 774
Kowa has released three viewers with a 77mm lens (the 881/883/884 have a 88mm lens), but what is the difference between these three spotting scopes? The TSN 773 and 774 are identical in specifications, only the 774 has a straight body and the 773 an angled body at 45 degrees. A straight body is mainly used for digiscoping (photography with a spotting scope) while the angled body is mainly used for normal spotting (with your eyes). In England and Germany the right models are very popular while in the Netherlands almost all sales go to the angled (45 degrees) bodies. The big advantage of a 45 degree angled body is that it is a relief for the neck, because you can see through it easily. However a straight body will find an object more easily because you see "right through" the spotting scope instead of in an angle. If you mainly are going to use it without camera, we recommend you buy the angled body.
So what is the difference between the Kowa TSN 771 and the Kowa TSN 774/773?
The last two (774/773) scopes use "Prominar Fluorite glass" while the 771 does not. Fluorite glass ensures maximum light transmission, thus a clearer image. The details are even more visible and give an even sharper picture, something ordinary glass cannot give. Fluorite has as a feature that the dispersion is incredibly low, so vague colours are fully eliminated. With fluorite glass, light transmission is 99%; the following diagram makes this clear.
Accessories: from a bag to various camera connections
Below we will discuss all the accessories available for the KOWA TSN. All these accessories are optional and can be found under the Accessories tab on this page, or in the bundle offers.
1. Kowa DA-10 Camera Adapter :Allows photography with a Kowa eyepiece andyour digital camera lens
The DA-10 is screwed on one side to the lens of your digital SLR camera. (Your digital SLR camera therefore needs a lens with thread at the FRONT SIDE to connect the camera adapter).At the other side, the DA-10 is connected to the eyepiece of the Kowa. With this set-up, you have a nice magnification and you can zoom enormously. The disadvantage is that the shutter speed decreases. The advantage is that there is a strong connection between eyepiece and objective and vignette is minimal. To get this setup working, you also need the following:
2. Kowa TSN PZ Varifocal Camera Adapter: : shoot without Kowa eyepiece and withoutcamera lens (shooting in primary focus)
This Camera Adapter is compatible with virtually all digital SLR cameras. You take pictures without the lens of your camera and without using the eyepiece of the Kowa Spotting Scope. In this set-up the Kowa Spotting Scope works as a telephoto lens (with F = 650 / f/7.5 to F = 1000 / f/11.4).
What you also need
You will also need the following to work with this set-up: T2 ring for your camera brand (we offer almost all current T2 rings).
3. Kowa TSN DA-4 camera adapter:Capable of shooting with Kowaeyepiece andordinary compact camera
This camera adapter fits virtually all compact cameras (or cameras where the lens cannot be removed). You take pictures through the eyepiece of the Kowa Spotting Scope along with your digital camera.
Advantages:
You will need the following to work with this set-up:
4. Kowa Stay On Case for TSN 774
With this case you can safely store your Kowa TSN. The bag is made for all-weather conditions. This way, you can calmly take your spotting scope with you into the field (please note it is delivered without the tripod shown in the picture).
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| General | ||
|---|---|---|
| Type | spotting scope | |
| Brand | Kowa | |
| Series | TSN | |
| Guarantee | 10 years | |
| Colour | green | |
| Weight | 1330 gram | |
| Waterproof | ![]() | |
| Dimensions | 12,5197×3,2283″ | |
| Image stabilisation | ![]() | |
| Optics | ||
| Lens diameter | 77 mm | |
| Magnification | 20 - 60× | |
| Exit pupil | 3,85 - 1,28 mm | |
| Twilight factor | 39,2 - 68 | |
| Light intensity | 14,8 - 1,6 | |
| Field of view at 1000 metres | 5 m | |
| Lens coating | Multi-coated (MC) | |
| Glass material | BaK-4 | |
| Coating prism | Phase coating (P) | |