Pro-Optic Extension Tubes?

Adorama's selling (a house brand?) set of extension tubes (for the Nikon AF)
that's half the price ($85) of the Kenko DG Auto tube set ($159). Does
anyone have any experience with them and how do they compare with the more
expensive stuff like Nikon's own?

TIA
Norm

"Norm Dresner" wrote in message
...
Adorama's selling (a house brand?) set of extension tubes (for the Nikon
AF)
that's half the price ($85) of the Kenko DG Auto tube set ($159). Does
anyone have any experience with them and how do they compare with the more
expensive stuff like Nikon's own?

Most third-party extension tubes are passive, ie. they don't pass data from
the lens to the camera body, whereas camera makers' tubes do so.

The EOS Pro-optic tubes do pass signals between the body and the lens.
However, there is no comparison between the Pro-optic extension tubes and
the canon ef-25. The Pro-optic tubes have solid pins that extend all the
way through the extension tube instead of "proper" connectors at each end.
I have had lots of problems with the pro-optic tubes and only use the ef-25
at this point.

Not sure how that would translate to the Nikon mount, but I'd suggest you
would be a lot better off purchasing a used nikon set rather than the
pro-optic ones.

Dean

"PanHandler" wrote in message
.. .

"Norm Dresner" wrote in message
...
Adorama's selling (a house brand?) set of extension tubes (for the Nikon
AF)
that's half the price ($85) of the Kenko DG Auto tube set ($159). Does
anyone have any experience with them and how do they compare with the
more
expensive stuff like Nikon's own?

Most third-party extension tubes are passive, ie. they don't pass data
from the lens to the camera body, whereas camera makers' tubes do so.

"Dean Franks" wrote in message
news:zoGEe.110516$Qo.56878@fed1read01...
The EOS Pro-optic tubes do pass signals between the body and the lens.
However, there is no comparison between the Pro-optic extension tubes and
the canon ef-25. The Pro-optic tubes have solid pins that extend all the
way through the extension tube instead of "proper" connectors at each end.
I have had lots of problems with the pro-optic tubes and only use the
ef-25 at this point.

Not sure how that would translate to the Nikon mount, but I'd suggest you
would be a lot better off purchasing a used nikon set rather than the
pro-optic ones.

Dean


It was pretty clear that to get the cost that far below the mfg's set they
had to take some shortcuts in construction but I had no idea what they'd
done. thanks much for the info.

Norm