Low quality extension tubes or tele-extender
could break or give way to the weight of extended macro lens.
Flash equipment featured the Metz CT 45 with tele-extender
, which he described as the ultimate potato smasher, Nikon SB-800 and Nikon R1C1 Close-up kit with three flashes.
Consider the purchase of a good Barlow lens or tele-extender
to increase your telescope's magnification.
(The 1D was equipped with a 100-400-millimetre stabilised zoom lens, as well as a 1.4x tele-extender
that doubled as a polar-bear-spotting telescope.)
The last category of adapter is the tele-extender
. This works only with Maksutov- and Schmidt-Cassegrain telescopes, which focus by moving the primary mirror back and forth.
An inexpensive way to double the focal length of your telephoto lens is to attach a 2x tele-extender
($30 and up), which fits between the lens and camera body.
For this reason, tele-extender
is not recommended to use on slower lens like f3.5 lens or lower.