How to focus properly?

I just bought a second-hand Oberwerk 10.5 X 70 Ultra and I’m a rookie when it comes to individual-focus binoculars.  When I try to focus the binos I feel like my eye is compensating for improper focus and when I look with both eyes the image takes some effort to focus on.  I think my eyes are compensating because the image can be in focus over quite a broad range of the eye piece’s movement and when I check after focusing each eye individually the right and left sides are often quite different.  It’s a bit hard to describe what’s happening but I thought this might be common trap for young players.  What’s the correct procedure for focusing IF binoculars?  Thanks.

With an individual-focus binocular, if you try to focus with both eyes open, you’ll have lots of trouble as your brain compensates for out-of-focus images.  I always close one eye, while I focus for the other eye.  Then I do the same for the other side.  When you close each eye, do so gently, otherwise you may temporarily change your eye focus from excess pressure.  After you do this a few times, it will become quite natural, and fast.  Let me know if that helps, or not.
Kevin Busarow

Hi Kevin,
Thanks for your help, it just took some experimenting to get worked out. The binoculars are fantastic,  particularly at night.

New for 2017, our Heavy-Duty Aluminum-Frame Case for Deluxe Series and Ultra Series

Our Deluxe Series and Ultra Series binoculars (except for the 10×50 Ultra) now come with the new Oberwerk Heavy-Duty Aluminum-Frame Case. On first glance, these new cases look similar to last year’s cases, but they are substantially stronger and simply much better quality. The only downside is they are almost twice as heavy as the old cases- but we’re sure you’ll agree it’s worth the extra weight to have a much better case protecting your binocular investment.

Black Friday?

Every year about this time, we’re asked what we’re doing for Black Friday/Cyber Monday. For 17 years, the answer is always the same- our products never go “on sale”, with the exception of discontinued items. 2540afcatWhenever you’re ready to order, any time of year, you’ll get our best price. We’re pretty-well stocked on most of our products, and we do have two more incoming shipments in the next 3 weeks- but we will run out of some items before Christmas. We therefore recommend that you order sooner rather than later. We just received a shipment containing our popular 25/40×100 “Contemporary” Long-Range Observation binoculars, but all were pre-sold to waiting customers- so they are still “out-of-stock”. Another shipment containing those arrives in mid-December, in time for Christmas delivery to the contiguous USA. The 25/40×100 “Classic” version is in stock. So order early and often!

Crystal Serenity Cruise Ship Completes the Northwest Passage (Long-Range Binoculars by Oberwerk)

Crystal Cruise’s Serenity just completed a 30-day cruise of the Northwest Passage. The Serenity is equipped with twelve of our 25/40×100 Long-Range Observation Binoculars. Four are placed on the Palm Court, some are moved around on the decks, and the rest are installed in penthouse suites. In the video below, the Cruise Director, standing next to one of our binoculars, talks about this first-ever voyage by a cruise ship. Crystal Cruise Lines is now taking reservations for the 2017 Northwest Passage Cruise (Aug. 15th – Sept. 16th).

Broadcasting live from Crystal Serenity.

Posted by Crystal Cruises on Tuesday, August 16, 2016

Fixed binoculars for Galapagos Ship

Dear Sirs,
I’m looking for binoculars to install on a ship’s outdoor deck that operates in the Galapagos Islands.  Similar to coin operated but without coins, for use of the passengers aboard so they can look at animals on the islands.  They must withstand salty weather conditions.  Please suggest anything you might have.

There are very few binoculars that can withstand a marine environment.  One would be the Fujinon 25×150 MT-SX, however it is quite expensive ($6195 not including mount).   The outdoor binoculars that you typically see at tourist sites are not very good optically, but you can find those at  You can read more about why I don’t recommend them at this link.   Our 25/40×100 Long-Range Observation binoculars are optically excellent, and affordable (under $2000), but can only be outdoors when the weather is good.  The cruise ship Crystal Serenity, which is just completing a 30-day Northwest Passage expedition, has 12 of these strategically placed onboard.  Let me know if you have any questions.
Kevin Busarow

Hi Kevin,
We would be interested in the 25/40×100 at $2000.  What do you mean by good weather?  No rain?  Most of the time we have trouble in equipment with the salinity.  Everything gets rusty.  IF it rains we could tell the crew to cover them or to take it inside.  What do you think?  Thanks.

Yes, the 25/40×100 is water resistant, not waterproof or weatherproof.  So would be best to mount these in the pilothouse or somewhere out of weather.  If that’s not possible, we do have weatherproof covers available.


Long range binocular recommendation

I was some 30 years ago invited to visit a US Navy destroyer and had the opportunity to view one of its high power stationary binoculars from off shore and was very much impressed on its quality.  I can view through the bino some miles away like it was just like in front of you.  My question is do you carry something similar?  Thanks.

The Navy binocular you saw was a 20×120, probably manufactured by Litton.  I’ve had a few of those in our shop. The Oberwerk 25/40×100 Long-Range Observation binocular is the closest thing on the market to that 20×120.  The Oberwerk comes with both 25x and 40x magnification built-in, so this binocular has even more power.  Available in two styles, “Classic” and “Contemporary“.  Let me know if you have any questions.
Kevin Busarow

Hi Kevin,
I actually bought a used Swarovski 30×75 binoculars with a Manfrotto Bogen Italian tripod but find it difficult to focus and therefore will be trying to sell it.  Instead I might buy the Oberwerk BT-100-45, yet I have following questions:
1) The 25/40×100 can easily turn the eye piece from 25x to 40x and vice verse. How about the BT-100-45
The 25/40×100 Long-Range has two pairs of eyepieces permanently attached to turrets, they simply rotate to switch in 25x or 40x.  The binocular telescopes hold just one pair of eyepieces.  To change magnification, you must remove the eyepieces and insert a different pair.

2) Is the BT-100-45 comes with the 45x?
No, the “45” means the eyepieces are mounted to the body at a 45-degree angle.  The binocular comes with 25x eyepieces.

3) The 75X eyepieces too powerful or should I go for lesser magnification?
75x is the maximum usable magnification, the image quality at 75x will not be as good as 25x.  If you are concerned about that, the 38x or 50x might be a better choice.

4) What is your honest recommendation for someone that knows very little about binoculars?
If you are not using this for astronomy, you might be better off with the 25/40×100 Long-Range (Classic or Contemporary).   For most customers, 25x and 40x is enough, and these are easier to use because everything is built-in, you are not dealing with loose eyepieces as you would on the BT’s.

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