High-End Spotting Scopes Review
Is Bigger Always Better?
by Danny Reever
I prepared this review because I’ve spent more hours looking through the eyepieces of spotting scopes than I’d care to remember. The reason for my optical obsession was simple–I wanted to find a scope (hopefully within my budget) that could reliably resolve 6mm bullet holes at 500 meters. I found that, when the mirage is boiling, this is a tall order, even for the very finest optics.
In my pursuit of the ultimate spotting scope, I worked my way up from a modestly-priced Bushnell, finally settling on the “supersized” Pentax 100ED. Along the way I owned a Nikon Sky & Earth, and a Pentax 80ED. I also tried out a variety of 80-85 mm objective scopes, including the vaunted Swarovski and Zeiss Diascope. Eventually, with a group of fellow shooters, we put three high-end products through a serious field test.
PRODUCTS TESTED: Pentax 80ED ($799), Pentax 100ED ($1599), Zeiss 85mm Diascope ($1359)
(Street Prices for body only–no eyepiece. Many vendors include a 20-60x name-brand eyepiece for $200-$300 extra.)
With the assistance of six other shooters, we tested the real-world performance of three premium spotting scopes: Pentax 80ED, Pentax 100ED, and Zeiss 85mm Diascope. In viewing actual targets at 200, 300, and 500 meters, we assessed how well these scopes could display bullet holes on paper. Resolving bullet holes in the black, at very long distances, demands exceptional clarity, contrast, and sharpness. Low-dispersion glass helps with that. All the scopes performed very well. At 200 meters, all three scopes showed bullet holes easily in the white and in the black. At 300 meters, the edge went to the Zeiss since its fixed-power eyepiece gave a slightly sharper image. Still, all three easily showed bullet holes in the white and most of the time in the black.
At 500 meters, all testers felt the Zeiss and the 100mm Pentax were about even with both scopes set at approximately 66X. The smaller Pentax came in a not-too-distant third, a lot to be said for a scope costing $600-$800 less than the other two. However, with the mirage running the day of the test, none of the scopes could resolve bullet holes in the black at 500 meters. I later tested the Pentax 100ED by itself on a clear day with minimal mirage. At 500 meters the Pentax proved itself, allowing me to see 6mm bullet holes, even in the black, no mean feat with my aging eyes. Previously, I found that, with my Pentax 80ED, I could see 6mm bullet holes about half the time at 500 meters when conditions were bad, and nearly all the time when conditions were good.
That provided an interesting lesson–namely that, to a great degree, the resolving power of all these scopes may be limited by environmental conditions, especially mirage. In other words, the atmosphere, rather than the glass, is the final limiting factor with scopes of this quality. Moreover, we quickly learned that to get the most out of these scopes, you need a super-stable platform. You can have the most expensive scope in the world but it won’t do you much good if you scrimp on the tripod and head. You’ve got to consider the whole package.
Disclaimer: I wish to set the record straight right from the word go. These are my own observations and opinions derived from comparing various spotting scopes in real world conditions. That is to say, at matches viewing bullet holes at various yardages. Please don’t fret if we didn’t test your new “Jupiter Buster” astronomical telescope that, theoretically, can resolve .22-caliber holes in the black at 2000 yards–at night–in a rainstorm. Maybe it can, I won’t argue. If you’re happy with what you have, I’m happy for you. For those still searching, hopefully this review will help shed some light, or at least point you in the general direction.
I began to compile a list of what I considered the top scopes for shooting sports, with the ability to see 6mm bullet holes at extreme ranges as my primary criteria. I judged them in real world situations, side by side, over the course of a season. I tried out as many as I could, at every match I attended. I tried both high-end scopes such as the Leica Televid 80mm, as well as modestly-priced optics. I looked through a lot of Kowas at matches, even two rigged together in the “Big Eyes” configuration favored by some 1000-yard shooters. Ultimately, I selected three top performers:
#1 Zeiss 85mm Diascope with 20-60 zoom. The Zeiss, with its large 85mm objective (front lens), edged out the others in clarity and resolution. Its dual-focus system, employing a course adjustment wheel plus a fine adjustment knob, allowed the best resolution of bullet holes at 500 and beyond.
#2 Swarovski 80mm with 20-60 zoom. The 80mm Swaro was not quite as bright as the Zeiss because it has a slightly smaller objective. Otherwise, it was an outstanding performer, coming in a very close second to the Zeiss.
#3 The Pentax PF 80ED-A with 20-60 zoom. For the money the Pentax is an excellent scope, fully waterproof, with ED glass, and the ability to adjust the angle of the eyepiece–very handy when sitting at the bench or shooting from the ground. This combination was not quite as good as the other two. But, at half the cost, the PF 80ED was definitely a contender. I noted that Better View Desired (BVD), a respected optics review, has chosen the Pentax PF-80ED as its “Reference Standard” among 80mm-class spotting scopes. BVD declared that Pentax offers “simply the finest eyepieces currently available for any scope on the market.”
At this point, I must say that none of the three could resolve 6mm bullet holes at 500 and beyond 100% of the time, especially when the mirage was running at its worst.
I chose the Pentax 80ED as my next scope purely on the basis of pricing. Both the Zeiss and the Swarovski nearly twice as much as the Pentax. The Pentax, mounted on my 3221WN tripod with the 3047 head, proved to be a good performer that allowed me to see bullet holes about 50% of the time at 500 and beyond when conditions were bad, and 100% of the time when conditions were good.
The Never-Ending Quest for Better Optics
With my new Pentax 80ED, I was happy–for a while. Then came the winter and lots of time to think. I began to wonder if there was some scope / tripod combo that would work better than even the Zeiss and Swarovski? Research revealed some glowing reports about the Pentax PF 100ED with 26-78 zoom. I began to do more research, and although a lot of New York camera shops advertised the PF 100ED, few actually had them in stock, and if they claimed they did, the price was very high. Besides I wanted to see one in the flesh, ideally to compare against what I already knew to be the best of the best. Well let me tell you, locating a PF 100ED was like tracking down “Bigfoot”–plenty of claimed sightings, but nothing I could get my hands on.
|During this time I accidentally stumbled onto what I consider to be the ultimate tripod / head combo as far as stability goes for our intended use, although some will argue in favor of the massive surveyor tripods that many 1000-yard shooters favor. That would be a Bogen model 3251 with a model 3039 head. Later in the article I’ll explain what makes these units so good.
Word to the wise: You can have the most expensive scope in the world but it won’t do you much good if you scrimp on the tripod and head. You’ve got to consider the whole package. Another important thing to remember when choosing tripods is to buy one tall enough so that you do not need to extend the center column. The setup will be most stable, and less susceptible to wind and vibration, with the center column at its lowest setting.
Now, back to the elusive “Bigfoot” 100mm Pentax. As winter ended and spring arrived I still hadn’t found any place where I could actually handle one. Some of the New York camera shops claimed they could furnish one, but at $1600+ I balked at buying one sight-unseen. I contacted Pentax USA and they didn’t have any either! They told me that it wasn’t a popular model due to the price and size. Their main sales were of the 65mm and 80mm versions to birders and wildlife observers. In fact, the Pentax Rep confided in me that the 100ED might be discontinued due to low sales volume. So, I put the idea on a back burner until I received a call from Pentax in mid June. The extremely helpful lady at Pentax arranged for me, through a great effort on her part, to get my hands on one of the elusive PF 100EDs.
When the brown truck finally delivered the box, I tore into it like a kid at Christmas. My first impression was that it was much larger and heavier than the PF-80ED. Yes, a sturdy tripod was in order for this one. Here’s how the two Pentaxs compare:
|PENTAX Spotting Scopes||Objective||Focus||Body Weight||Eyepiece Wt.||OAL||Eye Relief|
|PF-80ED-A||80mm||19′ to Infin||56.4 oz.||19.4 oz.||19″||22-18mm|
|PF-100ED||100mm||28′ to Infin||91.7 oz.||19.4 oz.||24″||22-18mm|
|The PF 80ED was considerably less massive, so I mounted in on my lighter 3221 tripod. The big 3251 tripod was the logical choice for the heavier and longer 100ED.
Then it was time to head off to the Shippensburg Fish and Game Club, my home range, to compare the scopes side by side, viewing targets at 500 meters. If you’ve ever shot Shippensburg, you know it can be one nasty range when it comes to mirage, not to mention winds from all directions.
|The Big Shippensberg Spotting Scope Shoot-Off|
Now it was time for a serious field comparison of the high-end spotting scopes. We gathered six long-distance shooters to try out the scopes at a real range, looking at real bullet holes in real targets. I brought the Pentax 80ED and its 100mm big brother. Unfortunately a Swarovski 80mm was not available, but we lined up a Zeiss, arguably better than the Swarovski in any case. I made arrangements with Chip Allen, a good friend, to bring his Zeiss 85mm Diascope, equipped with a Teleview Radian 8mm (66x) fixed-power eyepiece so we could compare the three side by side.
We decided to compare the three at different yardages using the actual targets we were shooting. The testers included myself and six other shooters–that way we had many sets of “eyeballs” with which to judge the scopes’ merits. The Zeiss and Big Pentax were set at 66X, while the Smaller Pentax was set at its max 60X magnification.
|Eyepieces–Angle Choice and Magnification
I feel a note about eyepieces is in order. First, should you chose a straight (inline) eyepiece mount, or angled? For the birder who is looking through a scope for hours on end the angled is definately the way to go–it really saves the neck. For shooters, the angled is worth considering since you can rotate the scope’s barrel a full 360 degrees. With the scope mounted to your side, and the angled eyepiece turned at 90 degrees, you can simply turn your head slightly and look through the eyepiece. That’s nice when the benches are cramped, and it may be essential when shooting prone. There is a trade-off though–an angled eyepiece mount adds one more mirror that reduces the clarity of the image somewhat. You’d never notice it until you compare two scopes, one angled and one straight, side by side. Then it’s apparent.
What eyepiece should you choose–fixed-power or zoom? Well, just like bullets being matched to a particular barrel, it sometimes takes some switching and comparison to find what works best with a particular scope. Many of the high-end scopes can use standard 1.25″ astronomy eyepieces, with appropriate adapters. So it’s entirely possible that a Zeiss eyepiece may work best on a Pentax or vice-versa. You don’t know until you try them. One of our readers, Nacroswnd from St. Louis, told us: “I’ve used the big Pentax and [you should mention] that it uses astronomy-grade eyepieces. This means that you can use your ultra fancy Nagler or Plossl astronomy-grade eyepieces for a really great view.”
As to magnification, remember that fixed-power eyepieces usually render a sharper image than variable-power eyepieces. Is the extra clarity of a fixed-power eyepiece outweighed by the zoom’s ability to dial up and down as conditions and mirage change? You must decide for yourself. Personally, I like being able to dial down a variable to 20X–a power level that delivers a nice, wide field of view. It’s much easier to get on target at 20X than 66X. For me, the zoom eyepiece’s ability to match magnification to the conditions more than makes up for a fixed-power eyepiece’s slightly superior clarity. Of course, if you have the cash, you can buy both versions–fixed and variable. (Swapping eyepieces takes just a matter of seconds). The question is, how deep are your pockets? A quality fixed-power eyepiece runs $240-$300.
At 200 meters, all three scopes showed bullet holes easily in the white, and also in the black for that matter. At 300 meters, the edge went to the Zeiss since the fixed power eyepiece gave a slightly sharper image. Still all three easily showed bullet holes in the white and most of the time in the black. At 500 meters, the Zeiss and the big Pentax were about even to everyone present with both scopes at approximately 66X. Cranking the power up on the big Pentax to 78X and it gained a slight edge with the added 12X of magnification. The smaller Pentax came in a not-too-distant third, a lot to be said for a scope costing six to eight hundred less than the other two. The two big scopes were easiest to see bullet holes with, but none allowed us to see holes in the black at 500 meters with the mirage running, on that particular day.
I returned to the range the following Tuesday, our usual “fun shoot” day, to try the big Pentax in simulated Match conditions. It was a beautiful day with a slight headwind and the mirage was almost non-existent. At 500 meters the Pentax proved itself, allowing me to see 6mm bullet holes, even in the black–no mean feat with my aging eyes. The superior light-gathering ability of the big 100mm objective combined with powerful 78X magnification made this possible.
And the Winner Is…
So, which scope was the best? Our seven-man jury decided it was toss-up between the Zeiss and the big 100mm Pentax, with opinions split about evenly. The Zeiss offered a very sharp view through the glass. However, some of the Zeiss’s exceptional clarity can be attributed to its fixed-power eyepiece. That was balanced by the versatility offered by the Pentax. We liked the 100ED’s zoom eyepiece that could go down to 20X for a wide field of view, or all the way up to 78x for max magnification in good conditions. The Pentax 80mm is a very good scope, at a bargain price compared to the other three. All have ED or Fluorite glass, all are water-resistant or waterproof, and most have lifetime warranties. The Zeiss and smaller Pentax are the most compact, with the 100mm Pentax being the largest and heaviest of those tested.
What’s the Bottom Line? If you chose any of the three scopes we tested you can’t go far wrong. I would also add the Swarovski 80mm to the list of truly great scopes, based on my earlier range observations. (If you’re curious about the Swaro, see this thread BirdForum.net where owners compare the Swaro to the Zeiss. There is also a very good discussion of Zeiss eyepiece options.) The 100mm Pentax, Zeiss Diascope 85mm, and the Swarovski 80mm are three premium, state-of-the-art optics.
Right now, I’m the happy owner of the big Pentax PF-100ED, with the 26-78X zoom, but you never know, this winter, when the snow’s blowing, I may read about and even bigger and better spotting scope, and here we go again!
|Other Premium Scopes–Editor’s Comments
No sooner was Danny’s article released than folks began asking about some of the other high-end scopes we didn’t have a chance to test this time around. These include the new Nikon 82ED FieldScope, the 100mm Optolyth, and the new Kowa 823/824 with ED glass. Let’s take those in order. User reports on the Nikon are very positive, and at about $1000 (street price) for body only, it’s a little cheaper than the Swaro or the Zeiss. If you’re looking to spend $1000+, you should take a look at the new Nikon. The German-made Optolyth 100mm is big and heavy, but it is extremely well made and the optics are outstanding. Optolyth’s maker was the first company to use Flourite lenses. Here is an Optolyth 100 User Review. Lastly, the new high-end Kowa TSN 823/824, with low-dispersion glass has garnered excellent reviews. Many of the bird-watchers say it beats the 80mm Pentax optically and is easier to focus than the Swaro. Unlike the Zeiss and Pentax, however, the big Kowa only takes Kowa-brand eyepieces. Most of the top-of-the-line spotting scopes can use a variety of 1.25″ astronomy eyepieces (adapters may be required). Anyway, if time and money permits, in the future we’ll try to get our hands on a Nikon 82ED and a Kowa 823M, and share our findings.
Mini-reviews from Mr. Moderator
Nikon Sky & Earth 80mm
Star-D (Davidson) Tripod
The best thing about the old Star-Ds is the price–you can find them on eBay for as little as $10, and rarely more than $40, in like-new condition. Only purchase the solid tubular all-metal version, not the newer Davidsons that have many plastic fittings. And make sure ALL the control knobs and levers are included.
Siber 20-50x Newtonian Spotting Scope
Orion Apex™ 102mm Spotting Scope
by Danny Reever
It was a snowy day outside, and I was perusing E-Bay in the photography section, when I came upon a unique ad. It seemed that a major western university was in the process of upgrading all of its photography equipment and was selling everything on E-bay in a rather unconventional manner. It wasn’t the usual bid process common to E-Bay; it was a “make offer” auction. If they found your offer acceptable you got the item. Well one of the items happened to be a Bogen 3251 studio tripod with Bogen 3039 professional three-way head, including the optional leg extensions, and in excellent condition with only a minor scratch on the Bogen decal. I quickly checked Bogen’s website and found this combination to be upwards of $750 suggested retail. I contacted the seller and he assured me that the condition was as claimed, with the tripod only having been used perhaps two or three times, it’s size and weight being unpopular with the students. I thought what the heck, and sent him back an e-mail offering a low-ball $200, expecting a counter-offer in return. Low and behold, his next e-mail accepted my offer if I’d kindly include $35 for shipping! Of course I jumped on it and closed the deal in a flash, my only regret being that since he had two I didn’t buy them both. I could have sold the other for $400 and have gotten mine for free. Foolish boy.
Here’s how the Bogen 3221 WN compares to the heavy-duty 3251:
As you can see, the 3251 has the advantage of more weight, and leg-bracing, which, together, add stability in windy conditions. It also has niceties such as bubble levels, quick-release legs, and a super smooth three-way head that is a dream to use. The 3251′s drawbacks are that is it is bulky for storage and transport, and it’s twice as heavy as the 3221 WN.
Bottom line: In the wind I’ll take the 3251 hands down. It’s that stable. The 3221 WN on the other hand packs well and is easier to carry. Here’s my final Tripod Tip: Tie a piece of light rope with a loop at the bottom to the center column of the tripod. Use your foot in the loop to help add instant weight when the wind is blowing.
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