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SWAROVSKI OPTIK 25-50x W Wide-Angle Zoom Eyepiece

BH #SWEP2550WW • MFR #49440
7 reviews
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SWAROVSKI OPTIK 25-50x W Wide-Angle Zoom Eyepiece
Key Features
  • For Swarovski Spotting Scopes
  • Waterproof & Fogproof
  • Wide-Angle
  • 65° Apparent Angle of View
The 25-50x W Wide-Angle Zoom Eyepiece provides a wide range of magnification for Swarovski ATS/STS spotting scopes. Its 65° apparent angle of view affords a broad look at the targeted area and makes it easy to find and track your subject. Waterproof and fogproof, this eyepiece is made to withstand the rigors of the field; you won't have to stay home just because there's a chance of rain in the forecast. It can operate in temperatures from -13°F to 131°F, and can be safely stored in even more extreme conditions at -22°F to 158°F.
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$949.00
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SWAROVSKI OPTIK 49440 Overview

The 25-50x W Wide-Angle Zoom Eyepiece provides a wide range of magnification for Swarovski ATS/STS spotting scopes. Its 65° apparent angle of view affords a broad look at the targeted area and makes it easy to find and track your subject. Waterproof and fogproof, this eyepiece is made to withstand the rigors of the field; you won't have to stay home just because there's a chance of rain in the forecast. It can operate in temperatures from -13°F to 131°F, and can be safely stored in even more extreme conditions at -22°F to 158°F.

  • Swaroclean external hydrophobic coating resists moisture/debris and eases cleaning
  • 25-50x magnification
  • Wide 65° apparent angle of view
UPC: 708026493409

SWAROVSKI OPTIK 49440 Specs

Key Specs
Magnification
25 to 50x
Angle of View
65° (Apparent)
2.4 to 1.6° (Actual)
Field of View
138 to 89' @ 1000 yd / 46 to 30 m @ 1000 m
Eye Relief
17.0 mm
Magnification
25 to 50x
Angle of View
65° (Apparent)
2.4 to 1.6° (Actual)
Field of View
138 to 89' @ 1000 yd / 46 to 30 m @ 1000 m
Exit Pupil Diameter
With 65 mm Scopes: 2.6 to 1.3 mm
With 80 mm Scopes: 3.2 to 1.6 mm
Eye Relief
17.0 mm
Fogproof
Yes
Environmental Resistance
Water-Resistant (Unrated)
Dimensions
ø: 2.2 x L: 3.3" / ø: 5.6 x L: 8.3 cm
Weight
0.7 lb / 295 g
Packaging Info
Package Weight
0.76 lb
Box Dimensions (LxWxH)
4.4 x 2.55 x 2.5"

SWAROVSKI OPTIK 49440 Reviews

Astronomers Perspective

By Greg
Rated 2 out of 5
Date: 2023-05-21

I'd like to provide some perspective for people considering this eyepiece for telescope use. I'm a fairly experienced visual observer and tested this zoom in my 8 dob and my AT80 EDL refractor. For me, this eyepiece really missed the mark and did not come close to the level of some other eyepieces ill mention later in my review. Daytime use: scope AT80EDL f/7 - zoom mechanism twists with ease. Buttery smooth. - The sharpest field stop of any eyepiece I've ever used. - Contrast and sharpness are definitely good but not mindblowing, especially for the price. - Parfocal across the entire 25-50 zoom range with the field of view increasing at higher power. - Chromatic Aberration of the Exit Pupil Ring of fire- None - Chromatic aberration- None noticed - Vibrant presentation of colors yet neutral. - Distortion type = Angular Magnification Distortion. Lines stay straight when panning. This is the preferred distortion type for terrestrial users but not for astronomical use since this changes magnification as an object enters and crosses the field, like a bird. Rectilinear distortion is what most astronomical eyepieces have. It keeps magnification constant across the entire field but does not keep lines straight which obviously doesn't matter at night. Since this eyepiece has severe AMD, it hints at it being preferred for daytime use. - The eyecup extender doesn't extend high enough. They should've designed it to raise more to allow for greater immersion for non-eye glass wearers. - Acquisition of the exit pupil is very difficult. This was the "end all" con for me. Probably the most difficult eye placement of any eyepiece I've ever used. Spherical Aberration of the exit pupil is really evident, the worst I've seen in an eyepiece. The horrific kidney beaning and blackouts were extremely noticeable. Even with the eyecup extended up or down in various positions, SAEP was there. - Field lens twist-on cap is unbelievably cheap plastic. Flimsy and very low-end. And the rubber eye lens cap doesn't stay on well at all and is attached to a very low-end lanyard material. Perhaps this lanyard connection cap is perfect for spotting scope users who quickly want to cover/uncover the eyepiece without losing the cap but I'm not a fan of this or the material used. This isn't a deal breaker but for $700 bucks I expect better use of material. Nighttime: 8-inch F/5.9 Dobsonian reflector - not coma corrected for the test obviously -The moon showed less CA or lateral color on its edges than the Televue ethos range. Nice. Contrast - Once again, pretty decent but not excellent. I compare it to a few eyepieces soon. - Sharpness: In the center - very good. middle of the field- getting much softer. Coma is visible even at about 35% away from the center. Edges - coma is extremely evident from about 50% away from the center all the way to the field stop. - field curvature - unfortunately yes. And that is saying a lot since my standard Newtonians field curvature is directly related to its focal length. AKA my scope has a flat field to begin with. The only time I should see field curvature in my 8 dob is if an eyepiece has it by design. The swaro has very evident FC. - The Swarovski Zoom definitely does NOT see as deep as the Televue Naglers(T4,T5 or T6's), Televue Ethos, and Baader Morpheus eyepieces. Not even close actually. The faint stuff is pretty hard to detect or find details in the Swarovski. M13 was the basic test. I could pick out great detail in M13 in all of my Televue ethos, Naglers, and 9mm Baader Morpheus but the Swarovski struggled much more. - EOFB Edge of field brightening- very minimal but I believe it has slight edge of field brightening Overall, definitely mediocre in ability and absurd for the price. I wanted to have a good quality zoom to have for daytime use and even sold my excellent televue delites (which are basically orthos) for this. I heavily regret that decision. I suppose other zooms like the Leica might be a better choice but Im not sure ill ever try a zoom again in this price category. They just don't seem to be at the level of high-end astronimical eyepieces with fixed focal lengths.

The zoom eyepiece to get

By Tippbirder
Rated 5 out of 5
Date: 2012-02-16

I compared this eyepiece with the old 20-60x eyepiece on my 80mm HD scope before I decided which one to get. I came to the conclusion that this is the zoom eyepiece one should get a the Swarovski scope. Both eyepieces offer great clarity and resolution. The main advantage of the 25-50x is the expansive view from 25x all the way to 50x. At the low end, the new eyepiece provides greater true FOV at a higher magnification than the old eyepiece. Translated to real birding situation, that means you see more birds that look larger and has more details. This is a win-win situation. At the high end, the magnification difference is not that great between 50x and 60x. In fact, if 50x vs. 60x makes a difference in your ID, I would argue that you are better off with an astronomy eyepiece that provides even higher magnification. The Swarovski 80mm HD scopes are so good optically, I have no doubt you can push it to at least 75x (6mm eyepiece) without much degradation of the view. Of course, even at 50x, the atomosphric condition often make the image shimmer so much that it provides no more ID help than at 30-40x. In that sense, the slight disadvantage of 50x vs. 60x is even less of an issue in practice. The 25-50x eyepiece is also a lot closer to being parfocal than the 20-60x, which means you'll need to refocus a lot less when you change the zoom. It also has slightly longer eye relief in practice than the 20-60x, which should be better for glass wearers. All in all, if you are deciding which zoom to get, the $160 price difference is a small price to pay for the better view and other nicities of the 25-50x.

See any errors on this page?

question

Would this fit an opticron gs665s?
Asked by: Anonymous
It only fits Swarovski scopes.
Answered by: Dan W
Date published: 2019-09-26

Does this item come with the original Swarovski ...

Does this item come with the original Swarovski box?
Asked by: Logan
The Swarovski 25-50x W Wide-Angle Zoom Eyepiece BH #SWEP2550WW • MFR #49440 is sold new and comes in the original Swarovski box.
Answered by: John
Date published: 2023-03-12
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