I get that the lens is 6.3 constant but is there a range and what is it? I have a 4.0 L lens and the range is 4 to 32 can this be stopped down?
810331
There is no aperture on a mirror lens. They cannot be "stopped down." As a mirror lens, the aperture is fixed, therefore you have to adjust the exposure using shutter speed.
2242622
sorry don't rember ever having that problem ?? but i'll look in the manual tomorrow!! doyou have a correct lens on?
437336
Its a prime lens so it has a constant zoom. I used a D90 and it worked perfectly well.
1620736
It is a f 3.5-6.3 lens and as such, performs as well as it should within those peramiters. If your camera has great high ISO with low digital noise, you should be happy with this lens as it also has lense satbilization except with Sony's A mount version.
982896
I also should point out that FF lenses when used on crop-sensor cameras, such as yours, behave as a longer lens. By the tune of 1.6x so this lens when on your camera would be the equivalent of an 28-216. It's like you have a longer lens. There are some good points to that, one is that since the edges are cropped off and that's where the most lens distortion occurs you'll get a clearer, sharper pic.
1679460
It's continuously variable, you'll have to estimate what f stop you're at... unless your lens has an aperture ring, in which case you just use that. It works well.
368679
I've not used them from much more than 30' away. I'm pretty sure you can't get much farther away than that. And that's straight on from the lens. From an angle it's even less
1092483
You have to get very close to the subject. I'm talking like less than an inch away. It took me a couple of tries to figure it out. It may help if you take your case off so that the lens is directly on top of the camera lens.
1632327
I believe the specs are correct - the lens will focus about 4 inches from the sensor plane (marked on the top right of the body) That's right about the front surface of the lens, which may be the reference. I have a 1A filter on mine, and the lens will go a little blurry if my subject is on the lens, but ease back just a bit and in it comes.
595082
I can focus down to about 1/2" from the lens with very good clarity. The problem may be your ability to get good lighting on the object. I do not know how small your object is. I used a AAA battery as an object and got good focus. The camera does have a macro function for close shots.I recommend backing off about 6-8 inches and using a little zoom for a close up. Auto focus produced a good image on my camera.
994207
The 2 lenses are good, but the main difference is on how sensitive the lens is. In the one i bought, it's lowest f-stop is 4. you need more light for avoiding grain. The one you are referring to works better in a low light condition (f 2.8).
1675352
There is a Macro Mode option. How close you can get to your subject depends on the zoom setting. It ranges from 0.4 inches to 2.0 inches from the lens, according to the user manual.
916481
I have been very happy with the 18-200mm. It was my first lens and remains a workhorse. I have since acquired a 28-135mm as part of a used setup and have yet to try it - there's been no need as the 18-200mm exceeds it in range.
1476725
I'm using this lens for long range stills... like a shot of a full moon I have it mounted on a Nikon D3100 with a doubler 2X making it a 1000mm Zoom lens. The first thing I noticed was that I couldn't hold it still enough to take a picture without some sort of stabilizer (recommend a tripod), the second thing is the light was really low, which for my purpose was perfect. I haven't tried it for any moving objects.
1118682
you will see some distortion at the 18mm range but will disappear in at the 25 to 28mm area- sometimes it is rather a nice special effect, depends on the shot. Make sure it is a Canon IS lens for the stabilization. The zoom has a very nice range but you will loose some speed as compared to a simple wide angle lens. It is a great walk around lens to suit needs of a wide range of situations.
1064913
Most of my contacts have been around 3'+ but I haven't had any issues. It's auto focus but I think you can zoom in/out after you transfer it to a computer.
230129
It has nothing to do with the lens, low light has to do with the camera. The 1.4 Fstop helps, but if you have a pro level DSLR going to 100,000 ISO is no problem.