What's the difference between 2.8mm / 4mm / 6mm /12mm?
52205
The smaller the number the wider the focal point, the larger the number the tighter the focal point. So 2.8mm is good for keeping an eye on your whole drive way and 12mm would be great for keeping an eye on the mail box at end of the driveway.
52206
2.8mm will give you wider coverage from one camera. As 12mm will give you a narrower coverage. The 12mm will allow you to cover a specific area location such as a cash register with greater detail. Hope that helps.
52207
It's the lens, a 2.8mm will give you the widest possible view, 12 being the closest.
52208
2.8 will provide a wider view, reference the link for a relative example. http://learnphotographywithtomgrill.blogspot.com/2011/05/lenses-introduction-to-focal-lengths.html
52209
Focal Length (mm)The focal length (measured in "mm") of a lens determines how far the camera can see. The most common focal length on security cameras is 3.6mm, which will allow for roughly a 72 degree field of view (FOV described below). This particular focal length works well for residential or small office surveillance applications.If you can only learn one thing about security camera lenses, you should learn that the bigger the focal length, the farther away it can focus. The smaller the focal length, the wider the field of view.- See more at: http://www.2mcctv.com/blog/2012_07_18-cctv-lens-guide-choosing-a-security-camera-lens/#sthash.XunzUGW5.dpuf Focal Length (mm)The focal length (measured in "mm") of a lens determines how far the camera can see. The most common focal length on security cameras is 3.6mm, which will allow for roughly a 72 degree field of view (FOV described below). This particular focal length works well for residential or small office surveillance applications.If you can only learn one thing about security camera lenses, you should learn that the bigger the focal length, the farther away it can focus. The smaller the focal length, the wider the field of view.- See more at:... » Read More Focal Length (mm)The focal length (measured in "mm") of a lens determines how far the camera can see. The most common focal length on security cameras is 3.6mm, which will allow for roughly a 72 degree field of view (FOV described below). This particular focal length works well for residential or small office surveillance applications.If you can only learn one thing about security camera lenses, you should learn that the bigger the focal length, the farther away it can focus. The smaller the focal length, the wider the field of view.- See more at: http://www.2mcctv.com/blog/2012_07_18-cctv-lens-guide-choosing-a-security-camera-lens/#sthash.XunzUGW5.dpuf « Show Less
52210
the smaller the mm the wider the picture, 2.8mm is i wide view, 12mm is more telephoto
52211
This is the difference in the fixed lenses on the unit. 2.8mm gives you the widest view and is generally the most common, 12mm gives a zoomed in image. So if you are putting the cameras in a tight room go with the 2.8 if you want to see down a long hallway or view far away go with a higher one.
1079498
9 mm is shorter than 3/8 in and 10 mm is longer than 3/8 in. so either one of those settings
707840
From what I can remember, 12" to 16" and thats about it. 4.8" -R12 7.5" -R16 195/75/R14 205/60/R15 205/70/R15 215/70/R15 225/75/R16 235/75/R15 235/80/R16 33" X 12.5"/R15
624550
I have the 2.8L lens, and I love it, but I wish it had IS. In my opinion, the only real advantage of the 2.8 is its greater light gathering power, to shoot inside or in deep shadows. The f4 with the IS can do most everything you want, especially if you have a camera with a high ISO. I don't know of any differences in the glass.
1289019
The web site says .5mm, and that is what I ordered. I think you should start with that size.
1130013
Your pocket should answer this question mainly.. I had f4 before getting the f2.8. For me , I love the 2.8 even though it is very expensive than the f4.The only thing I miss is the handy size of the f4....would not like take the the 2.8 when I go out to park with the children......
67140
Medium - up to 1/4in(8mm) or so at max & down to as small as about half that
895703
I bought the 0.5mm and the 1.5mm -- wish I had just purchased the .5mm because even though they both HURT, the smaller one is more tolerable.
622593
Thank you for your answers. I emailed the company and here is the information I was looking for.The larger tip is 9mm, the smaller 7mm., Hope this helps someone else, TechMatte was very responsive and quick....I love that :-)
325162
I think it's 2mm because it's small, that's equal to a little less than 1 inch ( like 3/4 of an inch)
633978
The one I order is 2.2. Different sellers sell different sizes so read description carefully.
1554185
You would need to drill it out. 6.4mm is equivalent to 1/4 inch. 1/8 inch would be 3.1 to 3.2 mm.
1824426
they are the standard 2 or 2 1/2" as far as I remember. They are definitely not 4". I have a Rikon dust collector that I am using now and it has a 4" inlet.
1675843
3/8" is the norm for everything. 1/2" is what we use for taking of truck tires. I'd go with the 3/8" if he bolts you sre working with are not larger than an inch or more
857191
It goes from 0.4mm to 5.0mm. However, from 0.4mm to 2.0mm, it's in 0.2mm increments. From 2.0mm to 5.0mm, it's it 0.5mm increments. (0.4,0.6,0.8,1.0,1.2,1.4,1.6,1.8,2.0,2.5,3.0,3.5,4.0,4.5,5.0)
1930004
The smallest is 2.2 mm, the largest is 11.2 mm (approximately). I use them for light duty applications, and so far they have been fine.
83488
12 mm is actually 0.472441 inches. Very close but not quite 1/2 inch. Hope this helps.