Jason Binoculars were popular in the 1970s and 1980s for their auto focusing ability.
Bushnell bought out the Jason brand in 1992 and now offers the auto-focusing binoculars under their PermaFocus series.
They are completely automatic and focus free.
The lenses are fully coated and give clear, bright, sharp images that are automatically focused as you view through the lenses.
You just bring them up to your eyes, aim them at whatever you want to see focused in the field of view and voila, instant clarity!
The 7x set of these will of course have less magnification than any of the others in this series, but is a favorite among those who want smaller and lighter binoculars to carry around.
These have a particularly wide field of view at 578 feet.
These Jason binoculars give you more magnification, but a little less field of view than the 7x35s at 393 feet instead of 578 feet.
It is one-half pound more heavier in weight than the 7x's as well.
The 12x50s have less than half the field of view of the 7x35s at 265 feet. The exit pupil is a little smaller than both the 7x's and 10x's at 4.2mm instead of 5mm.
The larger the exit pupil, the more light is able to come through the lens.
At 9mm eye relief, it may be a problem for those with eyeglasses.
Eye relief is the distance you can hold the binoculars from your eyes and still see a complete focused field of view.
I would say these would be best for viewing in far away subjects such as at concerts, perhaps hunting or viewing migrating raptors from an overlook.
I would not want to use the 12x50s for finding fast moving warblers in trees or on a pelagic bird trip because it is more difficult to steady binoculars at higher magnification.
But it is ultimately up to you and what your preference is. Lots of people did have positive reviews of these.
From the reviews of users, it is obvious that these "Jason Binoculars" by Bushnell are one of the best out there.
Users like their durable construction, lightweight feel and the fact that they really can focus on objects fast and quite easily.
Most use them for a multitude of purposes including bird watching, sporting events, concerts, golfing, hunting, star gazing and lots more.
So if you do not want to mess around with adjusting knobs and want quick, easy viewing, then these are the binoculars for you.
The Bushnell focus free Jason binoculars are available in the following sizes and magnifications:
They are also available in both wide angle (porro) and roof prism binoculars.
The wide objective lens is a great feature for letting in lots of light and wide field of views.
review of the differences between prism design go here:
Porro vs Roof Prism Binocular Design
In general, roof prism binoculars will be a little lighter in weight, slimmer in design and more durable but will generally cost more than porro prism binoculars.
Focus-free Jason binoculars give you the convenience of auto-focusing in a well-made, relatively low-priced binocular.
Just aim and your target appears not only magnified closer, but instantly in focus as well.
Focus free binoculars that have fully coated optics and rubber armoring at this price, you really cannot beat it. Go and give them a try!
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This appears to be a common complaint and I get asked this question quite often so I though I would address it here.
"We have a pair of Jason Perma Focus 1000 Model 295 binoculars. For the past several years, they have gotten sticky and the black material they are made out of comes off on our hands. Is there something we can clean them with?"
And similarly, William asked:
"I have a pair of auto focus Jasons, I enjoy and have for years, but the exterior has decomposed and get on everything including hands, like melted rubber, a mess."
Note again that this is an issue with the older brand Jason Binoculars, not the new Bushnell Perman-Focus Binoculars.
Answer 1: Our best DIY solution to get rid of the stickiness based only what we have read, but have not personally tried, is to put acetone (finger nail polish remover) on a cloth and wipe the binoculars down, being careful not to get any on the lenses. It will remove the stickiness, leaving a matte-looking surface. Use at your own risk! Maybe try a small test spot first.
Answer 2: Steve, a Birdwatching Bliss visitor, said this: "I cleaned mine using isopropyl alcohol, it is a messy job, but there was no chance of messing up the lenses. Just thought I'd pass on this method." I'm sure Steve can be trusted, but again, UAYOR and try a small test spot first!
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