Longer minimum focus distances compared to an SLR
Virtually no telephoto lenses beyond 135mm
Very wide angle or telephoto lenses require an accessory viewfinder, meaning focus and framing are separated
Leica M series History (brief) ...
Change the minimum focus distance
By using extension tubes (compare prices), you will increase the distance between the rear element of your lens and the film or digital sensor.
Shorter minimum focus distances but often some decrease in focal length towards closer focus distances. Non rotating front element.
RF (rear focusing)
Only one or more rear lens groups behind the diaphragm move during focusing.
Minimum focus distance usually varies with focal length, especially with zoom lenses. The more you zoom out to decrease the lens' focal length, the closer you can get to the subject.
Minimum focus distance stays the same. There's a light loss - two stops in the case of a 2x. Image quality suffers. Flare and ghosting can be issues shooting into the light, resulting in lower contrast images.
When shooting macro, you must also consider your lens’ minimum focus distance, which is the shortest distance from the sensor to the subject that a lens can focus. For example, the Nikon 60mm macro lens has a minimum focus distance of 8.
However, using Velvia with a Nikonos and 35mm lens may be difficult because at the minimum focus distance of 2.75 feet, most strobes give only enough light for an f/8 setting.
A teleconvertor increases the focal length of a lens, but it does not change the minimum focus distance. This results in an increase in magnification.
Many digital compact cameras, when set to macro mode and zoomed to the shortest focal length, can focus up to rediculously short distances and with a minimum focus distance of 1 cm, the LX3 is no exception.
Lenses have a minimum focus distance which varies considerably from lens to lens, some longer zoom lenses have a 'macro' setting and will focus quite close but most lenses will not focus close enough to take the picture on the right.
What is the close or minimum focus distance?
Just like a human eye, camera lenses have a near point at which they cannot focus anymore.
Some SLR lenses also have a minimum focus distance switch; setting this to the greatest distance possible (assuming the subject will never be closer) can also improve performance.
a consumer zoom at maximum focal length and minimum focus distance), stopping down to f16 may give optimum results.
Keep in mind the minimum focus distance of your camera's lens. Be sure to read Mark Plonsky's article on really getting close to your subject. Extreme close-up photography is sometimes referred to as macro photography.
These cameras generally have a minimum focus distance of about 1 or 2 feet (1/3 to 1/2 meter). Anything closer than that will look blurry without a macro function.
You may be able to back up a bit and zoom in, but without a special macro lens or close-up attachments, your focusing distance will be limited. Check the minimum focus distance on your lens, and stay farther than that distance.
For instance, at 10 feet, the 300mm setting is really only 200mm, and at 5 feet, the 300mm setting is really only 180mm. This is normal; it's an optical trick that lets it focus to 1.5 feet instead of having a 6 foot minimum focus distance, and yes, ...
Minimum focus distances for all three have been significantly reduced. All things considered, these should be excellent lenses for birders, sports shooters, or anyone who needs a big telephoto.
5 metres which means I can almost fill the photo with a small bird, even though the lens is 25% less powerful. You will have no problem with close focus if you're using a 1.4x, or 2x tele-converter as the minimum focus distance of the original lens ...
 See also: Focus, Minimum focus, Camera, Lens, Image
  
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