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Is the doubler practicle to use? |
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windstrings
Optics Apprentice Joined: October/19/2007 Location: United States Status: Offline Points: 81 |
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Posted: February/08/2008 at 11:53 |
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I have a pair of Swarovski EL 8.5 X 42 and was considering the doubler.
Although I've seem pictures of it.. I've never seen pictures of it "installed". Does it cause the side chosen to mount it on to stick out farther than the other? I've read where some would put it on and use one eye to see the distance and the other for up close. I would think that would be somewhat of a hassle to use unless both eye pieces were equal "standard non magnified vs. the doubler added". Can anyone comment on their practical uses and would they recommend it? I've also suspected its quality since they don't seem to offer a "tripler" like some of the other companies.... I didn't know if that was because of quality issues at the higher magnifications or whether they just chose to not offer it. Edited by windstrings - February/08/2008 at 11:55 |
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Bird Watcher
Optics Master Joined: August/30/2006 Status: Offline Points: 1523 |
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Yes, it sticks out. Basically you are turning one side of the binocular into a monocular spotting scope. Here's some spec.'s: Doubler Notice that the length is 4.53" long. Edited by Bird Watcher - February/08/2008 at 12:35 |
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lucznik
Optics Master Joined: November/27/2004 Location: United States Status: Offline Points: 1436 |
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Someone else asked me about the use of a doubler a few months ago. Here is the (slightly updated) response I gave him.
Edited by lucznik - February/08/2008 at 14:00 |
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RifleDude
MODERATOR EVIL OPPRESSOR Joined: October/13/2006 Location: Texas Status: Offline Points: 16337 |
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Thanks for your post, lucznik; I never thought of it that way. I always looked at those doublers as somewhat of a gimmick, but your explanation makes logical sense and I can see where even with its limitations, it would still be useful under the circumstances you describe.
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Ted
Money can't buy happiness... but it's much more comfortable to cry in a Porsche than on a bicycle. |
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windstrings
Optics Apprentice Joined: October/19/2007 Location: United States Status: Offline Points: 81 |
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Although not as serious nor as nice as a full spotting scope... if the higher end units really give good optics, it could sure be a fun after thought to play with for astronomy while camping or actually when finding yourself in that unusual pinch when you would have never dreamed you would need one.... and there you are, out in the middle of nowhere and would love to be able to see something really far off, just a little bit better.... but they are not cheap... unless they maintain the swarovski quality optics for final viewing, I think I would rather spend my money on a high powered monocular or similar and not be messing with my binoculars.
But the viewing ease must also be a consideration.... if when mounted I can simply shut one eye and choose which side to view from, then great, but If it renders the whole binocular useless for normal viewing until removed, then I don't think I would want it. |
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lucznik
Optics Master Joined: November/27/2004 Location: United States Status: Offline Points: 1436 |
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When it is mounted it does extend the length of the effected optical barrel. You can still look through the other optical barrel though, it is a little bit awkward. Removing the doubler is very, very quick and easy - at least the friction fit ones are. Of course, it should go without saying (though I still will say it) that to get the very best images, you should mount the whole thing on a tripod.
I've not looked through the Swaro or Zeiss units so, I can't speak to their quality other than to make two points:
First, you're talking about Swarovski and Zeiss, two giants in the optical market. How bad could the quality really be?
Second, I have a book called The Traditional Bowhunter's Handbook by T.J.Conrads. In it he has a chapter on optics in which he speaks highly of his Zeiss binocular and the Zeiss tripler with it. I've met T.J. and am confident that his assessment is honest.
The Bushnell unit I have offers, as I've already stated, views that I feel are at least comparable to that of the various sub-$300 spotters available. It is very useable as a small fixed-power spotting scope. With it's 3-position eyecup I am easily able to see the full FoV, even though I wear glasses. In addition to the good optical performance, the doubler's meager 4.5 ounce weight puts it in an entirely different class than any high powered monocular you might slip into your pack. I will concede that, if said monocular is of very high quality, the image might prove better but, you will pay for that in much increased bulk and weight.
The Bushnell Elite 2.5x "doubler" cost me $160. (The S & Z units are about twice that much - pretty much par for the course.)
For really serious, extended glassing you will want a larger, true spotting scope. But, I'd rather spend $160 on a doubler than $300 on a budget-class scope. And even if you have to spend the $350 or so for the Swaro or Zeiss, I'm certain you'll still get better performance than you would from a similarly priced spotting scope.
BTW, if you want to try the concept but, just can't justify spending the cash to get the Swaro or Zeiss, or if your binocular is not one of these brands, the lower cost Bushnell unit (because of it's friction fit style) will fit onto just about any full size (40mm+) and some mid size (30mm+) binocular, regardless of brand/model. Either that or you can come to Wyoming and I'll let you take a look through mine!
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What if the hokey pokey really is what it's all about?
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windstrings
Optics Apprentice Joined: October/19/2007 Location: United States Status: Offline Points: 81 |
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I think your right about rather having a doubler with a good quality glass than a spotting scope with lower.... although you get the added FOV etc, high quality glass is indeed intoxicating and hard to go back to less.
I would think the friction style would be real hit and miss as to achieving the exact right focal length etc to achieve perfect results... I'm surprised it works as well as it does. Maybe I'm spoiled, but I just can't see the logic in buying too cheap for something that I will use for years and years.... its almost like a prolonged agony of buyers remorse.... I would rather go for the gusto or just wait till I can get what I really want... in the meantime buy "really budjet" just to get by for the immediate crisis. I expect I will have to try out the doubler as its a nifty little add-on that has allot of potential. If you look at my avatar, you will see I have one eye that sticks out farther than the other one anyway! Edited by windstrings - February/08/2008 at 17:33 |
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lucznik
Optics Master Joined: November/27/2004 Location: United States Status: Offline Points: 1436 |
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What if the hokey pokey really is what it's all about?
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Bird Watcher
Optics Master Joined: August/30/2006 Status: Offline Points: 1523 |
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Just a quick comment.... There are some really good monopods out there as well, my favorite is the Manfrotto 682B self-standing pro. Here's a picture: Manfrotto Monopod Edited by Bird Watcher - February/08/2008 at 18:32 |
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