are these focus free?
1634670
Each eyepiece is independently adjustable and once set, only need minor adjustment for a sharp view depending on distance.
1634671
No. They do not autofocus. But once focused they are very stable, even in rough conditions and changing temperatures.
1634672
Yes, once you have set them to view with your eyes, they remain focused unless someone else uses them.
849351
Sorry, but I am not a birdwatcher so can not give a knowledgeable answer. They are however great for everything I use them for and it is amazing that they need no focusing. The only things out of focus are those that are very close (within about ten feet).
1063893
Yes you can also use a manual focus. it isn't something that I would use but it is there
1081719
It doesn't seem that way; I tried. However, it's hard to say for sure, because if you look closely, there may be a possibility that they can be pried out. I'm afraid to try though because I don't want to break mine. I'd say it's worth buying them anyway. They're not that expensive. Even if you're unable to rotate the lenses, they would be of great use if you like to read in bed or play on your phone. If not, they could be a great gift to someone who does. I can't live without them! I hope that helps. :-)
173803
I really don't know. These do not work for me since I wear glasses. I cannot get a good focus without my glasses, and when I wear the glasses, I can't get a good focus either. I really wish I would not have purchased these for myself. I gave them to my daughter who doesn't wear glasses and she says they are just OK. Hope this helps.
126644
Yes. With 'auto focus' they would be great, but should be supervised as they can break if dropped hard enough.
830702
No, these will give you only a narrow field of vision and magnification, but not clear focus for anything further than your TV set. These will also distort anything near to you.
1746323
Yes... but it's passive so you don't have control over aperture, image stabilization, and auto focus.
196468
Not from what I have seen. At 100x, the distortion is beyond a focus adjustment.
1615408
Yes, they are self focusing as I understand self focusing. You do have to adjust the distance from your eye center to center (pupil to pupil). You do this by grasping each barrel firmly and moving the barrels closer together or further apart until you see a single circular field. Everyone's eyes vary in distance dimension from center of left pupil to center of right pupil. Once this is done you just view an object and there is no distance adjustment required. The next time you use them, it is suggested that you recheck or reset that position as someone else may have used them, or a weight on the binocular may have moved the barrels further apart. Yes, they are self focusing as I understand self focusing. You do have to adjust the distance from your eye center to center (pupil to pupil). You do this by grasping each barrel firmly and moving the barrels closer together or further apart until you see a single circular field. Everyone's eyes vary in distance dimension from center of left pupil to center of right pupil. Once this is done you just view an object and there is no distance adjustment required. The next time you use them, it is suggested that you recheck or reset that position as someone else may have used them, or a weight... » Read More Yes, they are self focusing as I understand self focusing. You do have to adjust the distance from your eye center to center (pupil to pupil). You do this by grasping each barrel firmly and moving the barrels closer together or further apart until you see a single circular field. Everyone's eyes vary in distance dimension from center of left pupil to center of right pupil. Once this is done you just view an object and there is no distance adjustment required. The next time you use them, it is suggested that you recheck or reset that position as someone else may have used them, or a weight on the binocular may have moved the barrels further apart. « Show Less
1919017
They focus with each eye piece. There is no center focus. I like this way since my eyes are different. Focus is easy and the lens are very clear and sharp. The compass is very good but my compass light never did work, no big deal
867063
No. They are just, best suited for day use/bright light conditions. Use clear or amber lenses at night.
561673
These are not meant to autofocus. There is no communication from the camera to the lens through the tube. The ISO problem might be a different one, I don't see why having no communication with the lens can affect the camera's ability to change the ISO.
2112521
No, both lenses do not focus on a common point. The point of focus is extremely close to the lens, and the lenses are pointed straight ahead. It is necessary to use one eye at a time.
433974
yes. When I purchased these lenses quite a while ago, they came with free replacement headlight bulbs. The bulbs are hi/low beam.
345495
Yes they can, they can be utilized on any camera, for all they do is serve as a magnifying glass. If you want to get very very close you can stack one on top of the other. You may have to focus manually instead of using auto focus.
2191699
They are fixed focused. They are great for following action that has a continuous distance. Your eyes help you focus without the mechanical adjustments. I used them to watch races and the wide angle aspect makes them a good product.