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Pros: Cheap extension tubes for playing around with macro work. No glass to distort your image quality. Worked with my M42 to K mount adapter. I've seen others from China that were cheap looking. These ones seems to appear a little better built.
Cons: Won't communicate with auto lenses. This doesn't bother me, as I've got all manual lenses.
Other Thoughts: Others commented about tubes not mounting properly. I had no issues on camera or lens side. Worked as it should. (Pentax *ist D)
Bottomline: For the money, and free shipping, you can't go wrong.
Pros: Its a better choice than macro filters, as it doesn't change your image, if you settle it right you can really make great macro photos with it
Cons: actually it's impossible to screw the tube all the way in to the lens, although it does the job, and if used with careful you can work with it.
Other Thoughts: As in any other macro tubes you will need a lot of light to take the picture.As so, to take a macro indoor, you need a lot of artificial light very close to the object, and probably a tripod
Bottomline: for this price, it looks like a nice choice for begginers.
Pros: The price is even cheaper than comparable do-it-yourself solutions. Very strong metal construction and the matte black finish matches black Pentax lenses and bodies from the 70s onward. I've successfully tested my set on several film bodies, my K100D and my K20 without any issues.
Cons: Does not work well with automatic lens because the aperture on these lenses is electronically communicated and adjusted. If you must use automatic lens, be sure to use a well diffused external flash or a tripod, remote and a long exposure.
Other Thoughts: Contrary to other reviews, the body mount fits perfectly. However, the lens mount is tricky. Should you lose the little metal knob on the lens mount, your lens will become stuck to the mount and only a machinist will be able to remove it. So don't lose it!
Bottomline: Not as good as a dedicated macro lens, but a good introduction to those who are interested in macro photography. The included instructions are written in Chinese, but reading the Pentax forums on the Internet, and the various macro forums as well, are a good substitute.
Pros: + low price+ made out of metal+ three tubes yield six different combinations to fit your macro needs+ extension tubes don't affect the image quality
Cons: - the metal threads for attaching the tubes and mounts make a grating noise when screwed- the camera body mount does not fit so well, it only turns about 30 degrees before halting- the threads and mounts may lock very tightly together if turned too hard- no caps, but you can buy a set here for less than $3
Other Thoughts: Be very careful when attaching the tube mount to camera, it will turn only a short amount. If you try to turn it up to the locking pin, the metal will grind very tightly into the camera bayonet and raw force will be needed to get it off.
Bottomline: Very affordable set of three different sized extension tubes plus the two mounts, one for camera body and on for the lens. The Pentax mount does not fit well, so use with caution.
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