Sorry, I'm a bit puzzled. What's the difference between -4.0 and -4? I'm from China and 400 degrees of myopia. Should I choose -4.0 or -4 or 4?
82129
I think -4.0 and -4 are the same. If you are near-sighted, you should choose negative.
717780
Hello L., Unfortunately, these do only come in negative diopters. We do have -8 but not +8. Sincerely, Roy Lazarus Trivillage.com
2240578
I have had the 17-85 for a couple months and i already want to upgrade.. i want to sell it. i want the 17-40 f4 really bad. i would say unless dont mind about pictures that lack somewhat sharpness i would go with the 17-40. the 17-85 is hard to use i think.. of course unless you want mine ide sell it to you :)
878180
They were trying to say 7.4 - 22.4. Don't forget to calibrate this properly! It scares you when you don't haha
1212726
Yes, that is miss leading. Not sure which is more accurate. I would lean toward the 30 degree figure. More fog than driving, but fog lights that project better than traditional q/h type.
960178
I'm having difficulty recalling as I use mine only at 0 deg. --- but it seems as if the choices were indeed only 0 and 90. EDIT: based upon consensus, I'm guessing that my previous comment is not correct!
21264
Honestly there isn't a big deal between -3.50 and -3.00 and you can get either one and you will see grate. But if you are still not satisfied go for 2 pairs of one -3.00 and -3.50 and just switch lenses and this way you have to pairs with perfect match
473926
I'm getting ready to order the 400mm. I already have the 70-200L 2.8 IS and if I wanted the extra reach with zoom, I could put my 1.4x teleconverter on it, making it a [roughly] 100-280 f4.0. I don't have the 100-400 to compare, but I'd guess the sharpness is about the same between the 100-400 and the 70-200 + 1.4x. I still wouldn't have the reach between 280-400 but I'd have the sharpness when I need it. I can always attempt to move my feet to frame a subject with a prime if I'm too close. Read the reviews and decide for yourself.
41418
That is a very broad question. Everyone has different sensitivity. I can personally say I bought the .5 instead of 1.0 because I read it is best to work up to 1.0 because it is powerful. If you don't have sensitive skin then try 1.0. I did what was best for me when I purchased it. When I run out of .5 May up it to 1.0.
1140833
4.04 is from a specific vendor that I assume has worked something out with Amazon to be the default vendor for these glasses. If you look a little lower down you'll see where it says "New at $1.69" click on that link and other distributors will come up at a lot lower price. BTW if you want to buy some click on Aretex's link and order from me and I'll throw in a free pair of Radians Crossfire safety/sun glasses.
1660679
As others have stated there is no magnification. The 1-4 I believe refers to the MOA size of the dot. 1 MOA for more precise aiming 4 MOA for faster sight aquisition. You probably already know this but 1 MOA is roughly equal to 1 inch at 100 yards, 4 MOA roughly 4 inches so the bigger the dot the more of your target is covered and the less precise your aiming. This is a very generalized explanation. Hope it is helpful.
15899
The lenses in these are not as sophisticated as the ones you would get from an optometrist. Consider the price! As a rule, I normally go down rather than up, so in your case I would get -3 (rather than -3.5)
1276663
I've been using the 14-24mm f2.8 for a year now. Tack sharp! No lens creep. I was worried about no filters to protect glass also. Built in lens hood protects front element well enough. Lens cap fits OVER hood when not in use. I am comfortable with that. No VR doesn't seem to be an issue, as a lot of light comes through the glass and allows higher shutter speeds I feel. I generally shoot with a standard ISO of 400 to kick it up the speed a bit. Great lens. I also use the 24-70mm and 70-200mm lenses, both at f2.8 as well. Throw any pic from these three lenses on you monitor and you could cut yourself on the sharpness. LOL. I've been using the 14-24mm f2.8 for a year now. Tack sharp! No lens creep. I was worried about no filters to protect glass also. Built in lens hood protects front element well enough. Lens cap fits OVER hood when not in use. I am comfortable with that. No VR doesn't seem to be an issue, as a lot of light comes through the glass and allows higher shutter speeds I feel. I generally shoot with a standard ISO of 400 to kick it up the speed a bit. Great lens. I also use the 24-70mm and 70-200mm lenses, both at f2.8 as well. Throw any pic from these three lenses on you monitor and you could cut... » Read More I've been using the 14-24mm f2.8 for a year now. Tack sharp! No lens creep. I was worried about no filters to protect glass also. Built in lens hood protects front element well enough. Lens cap fits OVER hood when not in use. I am comfortable with that. No VR doesn't seem to be an issue, as a lot of light comes through the glass and allows higher shutter speeds I feel. I generally shoot with a standard ISO of 400 to kick it up the speed a bit. Great lens. I also use the 24-70mm and 70-200mm lenses, both at f2.8 as well. Throw any pic from these three lenses on you monitor and you could cut yourself on the sharpness. LOL. « Show Less
108097
This represents approximately 1/2 stop of light. That may not sound like much but in low light it can make a difference. Also, Nikon doesn't make a 24mm 1.8. the closest is a 28mm 1.8 which is obviously a different focal length. It is a very good lens however. If you don't need the 1.4 and 28mm is an acceptable focal length then go for that as it is much cheaper.
336773
Hi, I said I would check the use of the MaxTV glasses with my 4.25 Diopter contact lenses removed.I did, the focus adjustment did NOT go quite far enough to give a sharp focus. It was very close,but not quite there. If you used a two diopter, I don't think you would have a problem, even a 3 diopter would probably work. So for what it's worth. Ang, again, they work as I wanted them to.
382298
The 2.8 gives you slightly better VR and one more stop over the f4. You could always take advantage of Amazon's 30 day return policy and try the f4. If it works well for you, keep it. If not, return it for the f2.8 model. Your current lens has NO VR, so either lens would be a big improvement.
2151079
3-9 and 4-12 refer to magnification rate.You have ability zoom in more with later scope.